MOTOROLA SPECTRA MOBILE RADIO INFORMATION

	TABLE OF CONTENTS - DETAILED CONTENTS
		- INTRODUCTION
		- SINGLE RADIO DRAWER MOBILE CONFIGURATIONS
		- CONTROL HEAD CONSTRUCTION & PARTS COMBINATION EXAMPLE
			- Control Head Drawings
		- ORIGINAL STYLE REMOTE MOUNT CONTROL HEAD CONFIGURATIONS
		- SYSTEMS 9000 REMOTE MOUNT CONTROL HEAD CONFIGURATIONS
		- SYSTEMS 9000 PHYSICAL SECURITY CONTROL HEAD CONFIGURATIONS
		- SYSTEMS 9000 HOUSINGS CONFIGURATIONS
		- HHCH NOTES
		- PROGRAMMING TIPS
		- VHF MODEL NOTE
		- SYSTEMS 9000
		- MODELS
		- MANUALS
		- CABLES
		- BOARDS
			- Very Early Control Head P103 Connectors
			- Early Control Head P103 Connectors
			- Later Control Head P103 Connectors
			- Control Head P104 Connectors
		- DEKs
		- PARTS and ACCESSORIES
			- DPL / DCS INFORMATION
			- PAC-PL and PAC-RT VEHICLE REPEATERS
			- HAND HELD CONTROL HEAD
			- PROM PROGRAMMERS
			- GLOSSARY
			- WEB LINKS
			- SURPLUS PARTS GUIDE
			- ITEMS FOR SALE
			- WEB SITE REVISIONS
	- HOME

INTRODUCTION

The Spectra and Spectra II mobile radios are covered on this web site. The Consolette, Railroad, Metrocom MTC3600 (NYCTA) and VRM 600 Spectra radios are not covered. The Astro Spectra mobile is somewhat similar to the Spectra II, but is not covered (some Astro only accessories and manuals are identified for reference only). The Spectra II can be identified by its E2, E3, E4, E5, E7 or E9 control head designation and is sometimes called Spectra E instead of Spectra II. The Astro Spectra can be identified by a W3, W4, W5, W7 or W9 control head designation, or the Astro logo on the radio or control head.

The Spectra product line uses the Systems 9000 serial bus from the Syntor X 9000 radios. It also uses the same option Rx Option audio and Tx Option audio scheme used by the Syntor X 9000. The original Spectra uses PROM based firmware on a MLM board. Over the long time the original Spectra has been around, several different variations have been created. Even if they look the same on the outside, there can be important differences inside. The Spectra II is a more advanced Trunking radio later (newer) development that uses FLASH based firmware. The Astro Spectra is a digital capable radio with RSS programmable wide/narrow band that also uses FLASH firmware.

Spectra control head designations that start with A (i.e. A2, A3, A4, A5, A7 and A9) are for conventional (i.e. not trunking) Spectra radios. Control head designations that start with B (i.e. B2, B4, B5, B7 and B9) are for trunking Privacy Plus Spectra radios. Control head designations that start with C (i.e. C2, C4, C5, C7 and C9) are for trunking Smartnet Spectra radios. Control head designations that start with E (i.e. E2, E4, E5, E7 and E9) are for trunking Smartnet/Smartzone Spectra II radios. The A2, B2, C2 and E2 limited control heads have many of their button positions blanked out and do not support scanning or many features found on other radios. Trunking radios will usually also allow some conventional frequencies to be programmed.

These radios come in VHF, UHF, 800 MHz and 900 MHz versions. See the model chart for more information.

These radios contain a program with things like the Rx / Tx frequencies, PL / DPL tones, signaling, scan lists, etc., inside them called a code plug. The Radio Service Software (RSS) and programming hardware is used to read, edit, save and write the radio's code plug. You can not create a Spectra code plug from scratch. If must be read from the radio or loaded from a saved file on the RSS computer. The code plug contains the radio's model and serial number, which the RSS checks for, so Motorola made it difficult to use any other code plug than the one that came with the radio. Batlabs is the best Motorola site and their Spectra page is the best source of information on this that I know of.

The Spectra radio drawer uses a MLM board that plugs into the main Command Board. This MLM board contains RAM, PROM and EEPROM. The PROM has the radio's firmware permanently programmed into it. This PROM firmware is something like the radio's operating system. The EEPROM stores the radio's code plug. The code plug is like a program that runs under the radio's firmware based operating system. Because the firmware can not be reprogrammed, it is immune to corruption from failed radio programming attempts. In fact, the essential built-in programming that allows the radio to communicate through the Systems 9000 bus with the RSS computer, is contained in this PROM firmware. Because the code plug is reprogrammable with the RSS, it is not immune to corruption from failed radio programming attempts (a corrupted code plug can prevent the radio from powering up). The older HLN6024, HLN6062, HLN6064 and HLN6074 Command Boards use a 37 pin MLM connector and the newer HLN6094 Command Board uses a 40 pin MLM connector.

The Spectra II has a different Command Board with a built-in large flash EEPROM instead of a plug-in MLM board. The firmware and code plug both reside in this flash EEPROM. Because the Spectra II firmware can now be reprogrammed, it is not immune to corruption. At worst, corrupted firmware can even leave the radio totally unable to communicate with the RSS computer (this requires a major repair or replacement Command Board). FYI, the Astro Spectra also has a large flash EEPROM.

The version of the firmware in the radio can directly affect what accessories and options will or will not work with the Spectra radio. This version information can be accessed when the radio is powered up (after the "self chk" quickly press Home 5 times) or through the RSS and its programming equipment. Even if you have the correct firmware version and any required hardware, the radio's code plug still may not allow the accessory/option to used (i.e. you still may not be able to program it in the RSS). Here is a primitive beginning of a firmware version table:

Spectra Option Description	Required  Radio  Firmware  Version	Required Radio Hardware / Code Plug
Advanced Securenet	5.10 or later	Physical Security Housing assembly and Cabling.  Compatible control head.  Advanced Securenet capable code plug.
DTMF Decoding	5.10 or later	HLN6151A DTMF Decoder or  HLN6150SP?? Hear Clear (unknown SP #).  DTMF decode capable code plug.
Zone Operation	6.00 or later	Zone capable code plug.
Conventional RSSI	6.15 or later	A pre-programmed RSSI control head key.  An A4, A5, A7 or A9 control head.

• Do not confuse DTMF Decoding with DTMF Encoding. DTMF Encoding is a standard feature on many Spectra radios.
• The Hear Clear HLN6150 only has the copper traces for the DTMF decoder parts on the printed circuit board. I do not have the SP part number for the Hear Clear boards that actually comes with the DTMF decoder parts installed. The earlier Hear Clear boards do not have any DTMF support at all.

The way the Spectra powers up is different from previous radios like the Syntor X 9000. Just like other older models of mobile radios, the Spectra has a red/black power cable that supplies power to the radio drawer. All dash mount radio control heads and remote mount radio control heads, except for the Systems 9000 remote mount control heads, are supplied with power directly from the radio. Older radios, like the Syntor X 9000, used to supply switched power from the control head to the radio drawer. The Spectra radios do not work this way. The power switch on the control head goes to the radio drawer serial input/output chip and then to the radio drawer microprocessor through the switched B+ connection. It is a fancy way of providing a control head to radio drawer microprocessor interrupt wake-up function using the switched B+ line. The Spectra radio drawer serial input/output chip and microprocessor always has power whenever the radio drawer red/black power cable has power. When the radio is off, the microprocessor is in a sleep mode that draws an extremely small amount of power and the radio does not function. When the wake-up interrupt is activated through the switched B+ connection, the microprocessor comes out of sleep mode and the radio functions like normal (it draws way more power from its power cable when it is on). The difference is, the control head no longer provides the on/off switched power through the control head to the radio drawer internal voltage regulators, using switched B+ as the power source. Now the Spectra radio drawer serial input/output chip and microprocessor turns these internal voltage regulators on or off using the radio drawer unswitched A+ as the power source. Therefore, these switched internal voltage regulators draw their power from the radio's red/black power cable, instead of the control head power switch.

This change in the radio's on/off control improved the optional radio drawer based Emergency button operation. Now a Spectra radio drawer that is turned off can power itself up and send the Emergency signal to dispatch, without having to manually turn on the radio first. If the radio is off, the control head does not even power up at all. This improved Emergency operation is also one reason why the radio drawer based Emergency switch must be installed or the radio drawer Emergency input pin must be shorted to ground for the radio drawer to function normally (when command board optional jumper JU502 is installed, the Emergency input pin should be left open and not shorted to ground for normal operation).

Do not confuse this improved Emergency option, that originates from its own hardware input line attached to the radio drawer, with the old RSS programmable control head Emergency key or the RSS programmable control head VIP In Emergency button. The old control head Emergency key or button can also initiate the Emergency signal, but the radio must be manually turned on first, before this control head based setup will work. Even when the Emergency key or button is RSS programmed into the control head code plug, the new Emergency option input line from the radio drawer still must be setup correctly.

Obviously, the RSS programmed control head based Emergency key or button is not the preferred method of controlling the Emergency function. The Emergency line from the radio drawer is the preferred method. To use the Emergency function, MDC Signaling and Emergency must be enabled in the RSS Conventional Configuration (not to be confused with the control head Emergency key or VIP In button RSS programming). Even if MDC Signaling and Emergency is not enabled in the RSS Conventional Configuration, activating the radio drawer Emergency line will still cause big problems.

Changing command board jumper JU502 will reverse the radio drawer Emergency Switch polarity. JU502 is installed in most radios (i.e. it is the default) and radios with JU502 installed will act as described in the preceding paragraphs. If JU502 has been removed, then the radio drawer Emergency line wiring must be changed. Radios with JU502 removed that have their radio drawer Emergency line wired as described in the preceding paragraphs, will power up and be stuck in the Emergency state.

This change in the radio's on/off control can also have a negative side effect. If the radio's code plug suffers from certain types of corruption, the radio's microprocessor may not even turn the radio on. This type of code plug corruption might even leave you with no choice, except to replace the MLM on a Spectra or send in a Spectra II for service (the Spectra II has no replaceable MLM). Because the radio's microprocessor expects to find particular pre-installed code plug data before it will power up the radio, you can not simply replace the MLM EEPROM chip with a new unprogrammed chip when repairing the radio.

Control heads like the A2, B2, C2, E2, A5, B5, C5, E5, A7, B7, C7 and E7 using the HLN6075, HLN6263, HLN6283, HLN6337 and HLN6338 circuit boards have a U4 chip with interface circuitry and a built in electronic power switch control. There is no mechanical switch carrying power to the control head, radio drawer and VIP accessories. This electronic power switch is a operated by a simple momentary contact switch that causes U4 and Q51 to toggle the control head switched B+ power on or off. The switched B+ feeds the control head switched 5 volt regulator, which powers the control head U1 microprocessor. The switched B+ also goes to the radio drawer and wakes up the radio drawer microprocessor. This power switch difference can be important when troubleshooting radios with these electronic power switches. If you have a radio with one of these control head boards that will not power up, this could be one potential source of the problem. Control head circuit board jumper JU7 will bypass the electronic power switch and force the control head to be turned on all the time. Keep in mind that the control head internal switched B+ power, including the Switched B+ sent to the radio drawer, VIP Switched B+ pins and VIP-II DEK Switched B+ pins, all draw their power through Q51. All of the other control heads (including the HLN6020 and HLN6078) have a mechanical power switch that physically switches to and remains in the on or off position.

As these radios get older, the electrolytic capacitors can become a problem. If the electrolytic capacitors on the control head boards, radio drawer command board or RF board leak, it will disrupt the operation of the radio. Any leakage will also eat through the printed circuit board traces if left there long enough. The more common problems are radios that will not power up, get stuck in SELF TEST or give a FAIL 001 error message. Electrolytic capacitors are not the only cause of these problems, but they are becoming a fairly common cause. Keep this in mind when trouble shooting these radios.

Never ground either radio speaker lead. Grounding any/either speaker lead will destroy the audio amplifier chip on the Command Board. Motorola sells an audio isolation transformer for connecting test equipment, like a SINAD meter, to the radio speaker leads.

The standard HSN4018B speaker is 8 ohms. An optional HSN6001A 3.2 ohm speaker is available that is louder than the standard speaker.

The above drawing has "hot spots" you can click on for additional information. These are functional block diagrams only and have no relationship at all to true physical proportions.

• The radio drawer chassis comes in two different basic configurations. There are the low/medium power (50 watts or less) radio drawers and the high power (110 watt) drawers.
• The low/medium power radio drawer chassis is used for dash mount and remote mount radios.
• The high power radio drawer chassis is only used for remote mount radios.
• The low/medium power radio Interconnect Boards are interchangeable. The existing Interconnect board can be removed and a different one installed to change the radio configuration. Other changes to the code plug or control head accessories may be required to complete the conversion and/or installation. However, the Interconnect board for a high power radio can not be installed.
• The high power radio Interconnect boards are interchangeable. The existing Interconnect board can be removed and a different one installed to change the radio configuration. Other changes to the code plug or control head accessories may be required to complete the installation. However, the Interconnect board for a low/medium power radio can not be installed.
• When changing out an old dash mount control head for a new dash mount control head, first check the Interconnect board part number and new Control Head board part number. Any HLN6058 or HLN6066 Interconnect board will require modifications to work with later HLN6263, HLN6283, HLN6337, HLN6338, AALN4009 or AALN4015 control heads. If you do not want to make the Interconnect board modifications, then you will need a new HLN6285A Interconnect board instead.
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• The Low/Med Power and High Power radios use different power cables. The Low/Med Power cable is shared with other radio models like the MaxTrac and Radius mobiles. The High Power cable is unique to the Spectra/Spectra II/Astro Spectra high power radios.
• High power 110 watt VHF and UHF radios do not have a rear J2 DB-15 connector. All high power radios are remote mount only and have two DB-25 connectors (J5 & J6) on the front of the radio. There is no radio drawer plastic front either, it is metal with a locking drawer handle and uses a special base mounting plate (it is not exactly the same as, but is very similar to the Syntor X and Syntor X 9000/9000E radio drawer mounting system).
• The low and medium power radios have a standard mounting trunnion bracket and other optional mounts. There is also an optional locking kit.
• The low power motorcycle radios have a weather proof enclosure with an antenna.
• The Interconnect Board used depends on the radio configuration. Some earlier dash mount Interconnect Boards that appear to duplicate the same control heads supported by other boards, only work with older control heads (these older Interconnect boards can be converted to work with the newer control heads). The Interconnect Board is installed in the front of the radio drawer. The HHCH dash/remote mount radios and all low/medium power remote mount radios require a special plastic front. The other dash mount radios have the Interconnect Board sandwiched between the radio and control head.
• Clear Interconnect Boards are for radios without Internal Securenet circuit boards (the model number identifies Securenet capable radios). The Secure Interconnect Boards have the P506 Internal Securnent Keyloader Port for the P501 radio drawer internal option connector (an Internal Securenet circuit board can be plugged into the P501 connector). A Key-Variable Loader (i.e. also know as KVL, Code Inserter or Keyloader) and its cable are used to load the encryption key or keys into a Securenet option board through a Keyloader Port.
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• The pushbutton or rotary dash mount uses a A2, B2, C2, E2, A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7 or E7 control head. The dash mount J2 DB-15 wiring is slightly different than a remote mount (see below). Dash mounts use the 3080091M01 accessory cable attached to the J2 DB-15 connector on the rear of the radio drawer. Remote mounts may or may not use an accessory cable on the control head J3 DB-15 pigtail connector. Keep in mind, the high power radios and motorcycle radios are not available in dash mount configurations.
• The only real difference between a dash HHCH and remote mount HHCH, is the remote mount HHCH uses a special 3080069P02 or HLN6092A (old part # 3080069P01) J5 cable. The DB-15 Accessory Connector attaches to the radio's J2 DB-15 on a dash mount or to the cable's J3 DB-15 "pig tail" connector on a remote mount (this Accessory cable includes a Hang-Up Box connection). All of the single radio drawer HHCH radios use a special HHCH Interconnect Board and MLM module (the HHCH Interconnect Board and MLM will only work with the HHCH). The dual radio drawer HHCH radios that use the SIU, have the same Interconnect Board and MLM module as an A9 radio (the radio has a special SIU HHCH code plug with 2 digit numbers instead of mode names). The low / medium power HHCH radio drawer has different wiring on the J2 DB-15 connector.
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• All Low/Med power remote or dash mount radios can use the J2 DB-15 connector to program the radio.
• All remote mount radios with the J6 DB-25 connector on the front of the radio drawer can use it to program the radio. One exception is a low/med power radio with the HLN6261B Interconnect Board, which has its Systems 9000 bus pins on J6 disconnected (this version of the Interconnect Board comes without certain chip resistor jumpers installed).
• The very early HLN6020 and HLN6078 control head circuit boards have the Bus +, Bus - and Busy connections on the front microphone connector (later model control head circuit boards use these pins for the Securnet Keyloader Port). Radios with these very early control head circuit boards could possibly program the radio's code plug using these connections with a custom cable.
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• The J6 Options DB-25 connector is required for options like a rear control head (if available), Systems 9000 housings, etc.
• The remote mount radio configurations that show J2 as "not used", can still use this connector. It is just not part of the "standard" radio installation. Normally, the J3 cable connector or Systems 9000 connector is used instead.
• There are remote mount kits for dash mount radios. Therefore, radios with a D model number are commonly found in remote mount configurations where you would expect a T model.
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• Securenet dash mount radios have special Keyloader Port pins on the microphone connector (very early control head circuit boards do not have Keyloader pins) and use an Internal Securenet option board located inside the radio drawer. However, there was a special dash mount that used an external Physical Security Housing with a HKN6044A Securenet cable, a HLN6268A Interconnect board and part number 27-80246R01 Spectra radio chassis. The HKN6044A cable is attached to the bottom of the radio drawer using a unique Interconnect Board connector only found on this special radio (the special chassis has a hole in the bottom of the radio for this connector).
• Securenet remote mount radios with an internal Securenet option board located inside the radio drawer have a special P506 Keyloader Port connector above the J5 connector and require special secure plastic fronts to accommodate this extra connector. Radios with the external Securenet option board located outside the radio drawer in a Physical Security Housing have their own Keyloader Port on the housing, so these do not use P506. The Physical Security Housing is cabled between the radio drawer and front control head or SIU/HHCH. The Physical Security Housing requires the SIU if the HHCH is used (the HHCH can not communicate directly with the Systems 9000 external Physical Security Housing Securenet board). The radio drawer microprocessor could possibly substitute for the SIU, but it appears the factory never made any cables to support this configuration. When the SIU is used, the radio drawer Interconnect Board is not the HHCH model, it is an A9 compatible model instead.
• Full Feature Securenet is supported by the radio drawer P501 Internal Securenet Board.
• Advanced Securenet is supported by the Physical Security Housing Securenet Boards.
• Securenet capable radio models with the X in their model number (i.e. T83GXA....) have Securenet enabled code plugs and the remote mount models have a P506 Keyloader Port connector (except for the SIU/HHCH X model which has no P506).
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• The optional radio drawer emergency button (not to be confused with the control head based Emergency key or button) must be installed or the radio drawer emergency pin must be jumpered to digital ground for the radio to operate normally. The Low/Med Power radios include an emergency jumper to digital ground inside the 3080091M01 accessory cable or 3080010R01 accessory cable shorting plug. There is also a jumper on most newer remote mount radio Interconnect Boards to ground the emergency line that is not normally installed (I am not sure about high power radios). Some radio drawer Command Boards also have a jumper to ground the emergency line.
• The HLN6432 Systems 9000 connector converter board can jumper the emergency line to the VIP In 2 pin (this jumper may be installed by default on some boards). This board also has an optional jumper to short the Emergency line to ground.

The above drawing has "hot spots" you can click on for additional information. This is a functional block diagram only and has no relationship at all to true physical proportions.

• There is an early version of the J5 remote mount connector with a unique pin out. It exists when a dash mount HLN6058 or HLN6066 Interconnect Board is combined with a remote mount HLN6055 Interconnect Board. The early HLN6055 combination Interconnect Board was superseded by the newer HLN6077 dedicated single circuit board remote mount Interconnect Board. The HLN6077 has also been superseded by newer Interconnect Boards with the more commonly found J5 pin out. This HLN6055 Interconnect Board does not work with the Advanced Securenet Physical Security Housing.
• The HLN6058 or HLN6066 Interconnect Boards have special connections just for the HLN6055 board. The very early and early dash mount control heads avoided using these special connection pins. However, the later dash mount control heads did use these pins for other functions. The most noticeable problem is a later dash mount control head plugged into a HLN6058 or HLN6066 Interconnect Board will force the PTT to be stuck on. You can modify the HLN6058 or HLN6066 Interconnect Board to work with later control heads or you can replace the Interconnect Board with a HLN6285A.

J2 Dash and Remote Mount Radio Drawer Rear DB-15 Accessory Connector (all except HHCH and Motorcycle) (click on the above pin out for the cable info.):
The above view is looking at the back of the radio.

1. Tx Audio or Reset in SP customer applications
2. Emergency
3. VIP Out 2 * (Voice Inhibit in SP customer applications)
4. Switched B+
5. Ignition * (Switched B+ in SP customer applications)
6. Speaker Hi
7. Speaker Lo
8. Digital Ground
9. Systems 9000 Busy
10. Systems 9000 BUS -
11. Detected Audio or Voice Inhibit in SP customer applications
12. VIP Out 1 * (Data Inhibit in SP customer applications)
13. Inverted PTT or Switched B+ in SP customer applications
14. Systems 9000 BUS +
15. Microphone Hi (Ground or Reset in SP customer applications)

* Functional only in dash mount configuration. Not Connected in remote mount T model configuration when the J3 DB-15 connector or Systems 9000 connector is used.

J2 Motorcycle Remote Mount Radio Drawer Rear DB-15 Connector (click on the above pin out for the cable info.):
The above view is looking at the back of the radio.

1. Tx Audio in SP customer applications
2. Emergency
3. Horn / Lights
4. Switched B+
5. Ignition
6. Speaker Hi
7. Speaker Lo
8. Digital Ground
9. Systems 9000 Busy
10. Systems 9000 BUS -
11. Detected Audio in SP customer applications
12. Hang-Up Box 1 (HUB 1)
13. PTT 1
14. Systems 9000 BUS +
15. Microphone Hi

J2 HHCH Dash Mount Radio Drawer Rear DB-15 Connector.
The above view is looking at the back of the radio.

1. Tx Audio in SP customer applications
2. Emergency
3. Hang-Up Box (HUB)
4. Switched B+
5. Ignition
6. Speaker Hi
7. Speaker Lo
8. Digital Ground
9. Systems 9000 Busy
10. Systems 9000 BUS -
11. Detected Audio in SP customer applications
12. VIP Out 1
13. Inverted PTT in SP customer applications
14. Systems 9000 BUS +
15. Microphone Hi

• All of the above J2 connector pin outs are for normal (i.e. not SP) radios. There are jumpers located on the Command Board that can change the functions of some of these pins in SP radios.
• Radios that have code plugs with different control head configurations (i.e. different than what the radio original came with) forced into them, may not have the correct Command Board jumpers set and the J2 connector pins may not work correctly as shown above. Keep in mind, the single radio drawer HHCH has a unique MLM and Interconnect board that only works with an HHCH code plug.

Here is an example of how to put A2, B2, C2, E2, A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7 and E7 control heads together:

The above drawing has "hot spots" you can click on for additional information.

• Check out the control head drawing page for information on the different types of control head fronts.
• This is an example of how A2, B2, C2, E2, A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7 and E7 control heads are put together. Substitute A5 with A2, B2, C2, E2, B5, C5 or E5. Substitute A4 with B4, C4 or E4. Substitute A7 with B7, C7 or E7.
• The example shows how different variations of parts can build the same control head for dash mount, original style remote mount or Systems 9000 remote mount.
• FYI, the A9, B9, C9 or E9 control heads are Systems 9000 only and as far the above example goes, they will only work with the Systems 9000 HKN4355 or HKN4356 remote mount cables. They are also available as a completely assembled control head with a part number that starts with HCN.
• Notice the A2, A5 and A7 share the exact same control head circuit boards. What matters is the radio's code plug. You can attach an A7 control head to a radio drawer with an A5 code plug and none of the extra A7 buttons will work because the radio's code plug will not recognize them.
• The radio's RSS programmed code plug will determine what types of control head can be used (see above). If you can not program it in the RSS, you can not use it!
• This example does not go into any exceptions. For example, the motorcycle control head only exists as an original style remote mount. There is no such thing as a motorcycle dash mount or motorcycle Systems 9000 remote mount. Another small flaw is, the HKN6062 motorcycle cable should be shown going to a Motorcycle radio drawer, not the Trunk mount radio drawer.
• The A5 / A7 control head circuit boards evolved, starting with the HLN6020, then the HLN6078, HLN6075, HLN6263, HLN6283 and finally the HLN6337. The HLN6338 is the motorcycle control head which I believe has different jumper settings and is probably weather resistant.
• The HLN6020 and HLN6078 circuit boards use different A5 / A7 front plastic that I do not have the part numbers for. It has a different type of power switch that is attached to the front plastic. The front microphone connector wiring is also different.
• The A4 rotary control heads come in a standard AALN4009 or motorcycle AALN4015.
• The HLN6337 is an enhanced control head. When this control head is installed, the RSS can set the control head to enhanced and program VIP inputs / outputs and control head options like the DIM levels. If you have the enhanced head and a Systems 9000 remote mount, you can also program and use up to 3 DEKs.
• I think the AALN4009 rotary head may also be enhanced (there were lots of versions of this board starting with revision A and it is at least at revision J now, so some older version may or may not be enhanced)?
• I do not know if the HLN6338 motorcycle head is enhanced or not.
• The AALN4009 can be ordered as a kit with the front panel included as part number AALN4008J. The motorcycle AALN40015 can be ordered as a kit with the front panel included as part number AALN4013D.
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• The A5 and A7 code plugs can be set as "standard" or "enhanced" in the RSS. If you start with an A5 code plug, then "standard" and "enhanced" only applies to an A5 control head. If you start with an A7 code plug, then "standard" and "enhanced" only applies to an A7 control head. The "standard" setting will not allow the control head configuration RSS programming screen to program any DEKs, DEK VIP inputs/outputs or control head options (i.e. Backlight and Dim settings). The RSS "enhanced" setting will allow all of these to be programmed. An enhanced control head circuit board is required for the control head options programming (i.e. Backlight and Dim settings) to have any effect. A Systems 9000 remote mount and an enhanced control head circuit board is required for the DEK programming to work (but it will mess up your regular VIP ports if you program a DEK without the required stuff).
• Troubleshooting tip: If you do not have an enhanced A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7 or E7 control head circuit board and you attach a DEK, the DEK will not work. You have to separate the control head housing plastic (using the 2 front screws) and check the control head circuit board part number tag to find out if it is enhanced. The other alternative would be to try programming several different enhanced control head options (i.e. Backlight and Dim settings) and see if the control head responds to the programming. If you only tried programming it one time with one setting, you would have to check the jumpers on the control head circuit board first, too make sure your programmed values do not mimic the jumpered defaults (i.e. in that case just look for the tag instead). The enhanced control head is the only one that will respond to the different settings correctly.
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• If you have a HLN6075, HLN6263 or HLN6283 control head circuit board, you can remove the zero ohm chip resistor jumper JU16 and install jumper JU17 to always force the backlight to be on.
• The enhanced HLN6337 and HLN6338 also have these jumpers, but the backlight setting is RSS programmable (therefore, there is no reason to mess with these jumpers unless you do not want the radio operator to be able to manually turn the backlight off).
• FYI, the A9, B9, C9 and E9 control heads have a RSS programmable VIP In backlight DIM control. One of the VIP In ports can be set to "DIM ON HIGH" or to "DIM ON LOW" and that input port pin is connected to the vehicle headlight switch.
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• A later version dash mount control head plugged into a HLN6058 or HLN6066 Interconnect Board will produce the following short circuits (the Command Board audio amplifier chip may be blown up by these speaker lead short circuits):

HLN6058 and HLN6066 Interconnect Board to Later Version Control Head Short Circuits
P502 pin #	P502 Description		J103 pin #	J103 Description
3	Emergency	-to-	28	HUB
10	Ground	-to-	24	PTT
34	Speaker Lo	-to-	2	VF Sense 2
35	Speaker Hi	-to-	1	VF Sense 1

• The dash mount HLN6058 and HLN6066 Interconnect Board P502 pins 3, 10, 34 and 35 must be removed or the PC board traces cut for use with dash mount later version control heads. These changes convert the older HLN6058 or HLN6066 into an equivalent of the newer HLN6285A Interconnect Board. These four P502 problem connections found on the HLN6058 and HLN6066 were originally intended to support the long obsolete HLN6055 remote mount converter board.

Here are the original style and motorcycle Spectra remote mount control head hookups. The original style cables were eventually replaced with Systems 9000 cables, see below. The HHCH cables were not changed to Systems 9000 cables because the HHCH is not Systems 9000 compatible. The motorcycle radios were not changed to Systems 9000 because their control head connector is weather resistant. The A9, B9, C9 and E9 control heads will not work with these cables:

The above drawing has "hot spots" you can click on for additional information.

• A: Radio drawer J5 remote mount A2, B2, C2, E2, A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7 or E7 control head, uses the 3080157M01 or 3080157M04 cable. The P104 microphone connector on the front of the control head is used.
• B: Radio drawer J5 remote uses the HKN6034A or HKN6035A cable to connect to the Physical Security Housing. The Physical Security Housing J2 / J5 & J100 connects to the remote mount A4, B4, C4, E4 or later version A5, B5, C5, E5, A7, B7, C7 or E7 control head, using the HKN6036A or HKN6037A cable. The very early control heads will not work (the VF Sense connections are missing and the firmware is not compatible). Special control head jumpering to connect the VF Sense leads to the Spare leads is required (the control head Spare leads are not usable as Spares with the VF Sense jumpers connected). The P104 microphone connector on the front of the control head is used for the microphone connection. The Physical Security Housing has its own Keyloader Port, so it does not use the P506 radio drawer Keyloader Port or the control head P104 microphone connector Keyloader Port pins.
• C: Radio drawer J5 HHCH remote mount uses the 3080069P02 or HLN6092A (old part # 3080069P01) cable. A special Hang-Up Box is required for the HHCH. These remote mount cables only work in conjunction with a special radio Interconnect Board and MLM (i.e. the single radio drawer HHCH is different than any other configuration). The dual radio drawer HHCH is different than this single radio drawer HHCH and uses a standard A9 type Interconnect Board and MLM (it has a SIU and different Systems 9000 J5 cables also). The HLN6024, HLN6062, HLN6064 and HLN6074 Command Boards do not support the single radio drawer HHCH.
• D: Radio drawer J5 motorcycle remote mount A2, B2, C2, E2, A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7 or E7 motorcycle weather resistant control head, uses the HKN6062A cable. The P104 microphone connector on the front of the control head is closed off with a plug (part number 7502118Z01). The weatherproof J3 DB-9 microphone connector is used with a special HMN1062A weather resistant microphone. The 3080010R01 accessory connector is used to attach the fused orange ignition wire, optional headset connector, optional radio drawer emergency switch (or standard emergency ground jumper) and any optional VIP hardware at the J2 DB-15 connector on the rear of the radio drawer.
  •  
• The 3080157M01 or 3080157M04, HKN6036A or HKN6037A and HKN6062A cables require the remote mount control head 1580293L02 rear plastic housing. None of these cables can be used with a DEK.
• Only the 3080157M01, 3080157M04, HKN6036A, HKN6037A, 3080069P02, HLN6092A (old part # 3080069P01) or HKN6062A remote mount cables have a J3 "pigtail" connector. The J3 connector is not found on any Systems 9000 cables.
  •  
• As you can see, the dash mount, motorcycle and HHCH VIP connections are very limited, comapred to the remote mount.
  •  
• I do not know if a remote mount rear control head is supported for these configurations or not (I doubt it is possible). The remote mount Systems 9000 HCN1071 is the only rear control head I am aware of, which will not work with these original style cables. If there is a another rear control head, it will require the radio drawer J6 Options connector. The radio's code plug will also have to allow the use of a rear control head.
• The HLN6261B Interconnect Board has the Systems 9000 serial bus and Filtered Audio disabled on the second DB-25 J6 connector. A Spectra radio with this Interconnect Board can not be programmed from the J6 front DB-25 connector and will not support any Systems 9000 housings or rear control head options.

J3 Remote Mount "Pigtail" Cable DB-15 Accessory Connector (all control heads listed for configuration A above) (click on the above pin out for the cable info.):
The above view is as if you were looking at the face of the connector on the radio cable.

1. No Connection
2. Emergency
3. VIP Out 2
4. Switched B+
5. Ignition
6. Speaker Hi
7. Speaker Lo
8. Digital Ground
9. VIP In 3
10. VIP In 2
11. No Connection
12. VIP Out 1
13. No Connection
14. VIP In 1
15. VIP Out 3

J3 HHCH Remote Mount "Pigtail" Cable DB-15 Accessory Connector:
The above view is as if you were looking at the face of the connector on the radio cable.

1. Tx Audio in SP customer applications
2. Emergency
3. Hang-Up Box (HUB)
4. Switched B+
5. Ignition
6. Speaker Hi
7. Speaker Lo
8. Digital Ground
9. Systems 9000 Busy
10. Systems 9000 BUS -
11. Detected Audio in SP customer applications
12. VIP Out 1
13. No Connection
14. Systems 9000 BUS +
15. No Connection

J3 Motorcycle Remote Mount "Pigtail" Cable DB-9 Connector:
The above view is as if you were looking at the face of the connector on the radio cable.

1. Microphone Lo
2. Microphone Hi
3. Hang-Up Box 2 (HUB 2) *
4. PTT 2 *
5. Digital Ground
6. Switched B+
7. No Connection
8. No Connection
9. No Connection

• * If a motorcycle cable is not used with a motorcycle radio drawer and motorcycle control head, then pin 3 HUB 2 becomes VIP Out 2, and pin 4 PTT 2 becomes VIP In 1. This means the HMN1062A microphone on the J3 DB-9 microphone connector will only work correctly on a motorcycle radio (it is probably possible to reconfigure other radios to work with this microphone).

Here are the Spectra Systems 9000 remote mount control head hookups:

The above drawing has "hot spots" you can click on for additional information.

• A: Radio drawer J5 remote mount A2, B2, C2, E2, A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7, E7, A9, B9, C9 or E9 control head uses the HKN4355 (old part # 3080183P01) or HKN4356 (old part # 3080183P02) cable. The optional VIP hardware uses a 15-80221J01 VIP Connector Housing. There is a total of 3 VIP In and 3 VIP Out physical connections available.
• B: Radio drawer J5 remote mount A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7, E7, A9, B9, C9 or E9 control head with 1 DEK, uses the HKN4355 or HKN4356 cable. The DEK is attached with a HKN4273A (old part # 3080248L01) DEK Interconnect Cable. The optional VIP hardware uses a 15-80212L01 VIP II Connector Housing. There is a total of 3 VIP In and 3 VIP Out physical connections available.
• C: Radio drawer J5 remote mount control head (see B above for CH models) with 2 DEKs, uses the HKN4355 or HKN4356 cable. Each DEK is attached with a HKN4273A DEK Interconnect Cable. The optional VIP hardware uses one or two 15-80212L01 VIP II Connector Housings. There is a total of 6 VIP In and 6 VIP Out physical connections available.
• D: Radio drawer J5 remote mount control head (see B above for CH models) with 3 DEKs, uses the HKN4355 or HKN4356 cable. Each DEK is attached with a HKN4273A DEK Cable. The optional VIP hardware uses one, two or three 15-80212L01 VIP II Connector Housings. There is a total of 9 VIP In and 9 VIP Out physical connections available.
  •  
• Special programming note for early A9, B9, C9 and E9 control heads. One early Spectra head was a HCN1045B and later C, D, etc. revisions. This control head uses through hole printed circuit board construction and Dual In-line Package (DIP) integrated circuits. The HCN1047 is a trunking example of one of these early heads. If you try and write a code plug to the radio with the RSS on one of these early heads, the RSS will return error 80 (cannot program the S9000E control head). These early control heads have a built in hardware protection circuit that prevents the EEPROM from being programmed unless the microphone hi line is shorted to ground. Motorola used to make a Spectra programming adapter for this function that plugged into the microphone jack, that I do not have a part number for. However, you can make your own programming adapter or modify the programming cable to short the microphone hi line. Be careful and do not power the radio on or off with the microphone hi line shorted or you might corrupt the code plug in the control head EEPROM. The later control heads, starting with the HCN1061 and higher numbers uses surface mount printed circuit board construction and Surface Mount Device (SMD) integrated circuits. These later control heads do not require the microphone hi line to be shorted.
  •  
• The optional radio drawer Emergency button can be wired to the control head VIP port. When a VIP In pin is used for the radio drawer Emergency Button wiring, that VIP In port is not RSS programmed with a VIP In Emergency function (i.e. it is only used as a convenient place to attach the external Emergency switch wire at the cost of consuming the use of one of the unprogrammed VIP In port pins). The DEK VIP II pins can not be used for the radio drawer Emergency line. This Emergency line can be wired to a DEK cable connector that is plugged into the control head (VIP In 2 is used). The radio does not have to be turned on for this radio drawer based Emergency function to work. The A9, B9, C9 and E9 control heads require a custom jumper to connect the radio drawer Emergency line to the VIP In pin (usually J1 pin 27 to J1 pin 3).
• The control head keypad, VIP or DEK VIP II ports can still have a RSS programmed Emergency key or button. These control head based Emergency functions will not work if the radio is turned off.
  •  
• The A2 B2, C2, E2, A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7 and E7 remote mount control heads require the HLN6432 Systems 9000 connector converter board and 1502116Z02 rear plastic housing to use the HKN4355 or HKN4356 Systems 9000 cable.
• The A9, B9, C9 and E9 control heads only come with a Systems 9000 connector.
• To add any DEKs, the Spectra requires an A9, B9, C9 or E9 control head, or an enhanced A5, B5, C5, E5, A7, B7, C7 or E7 control head (with the RSS code plug set for an "enhanced" control head). The HLN6020, HLN6078, HLN6075, HLN6263 and HLN6283 control heads are not enhanced and will not work with any DEKs. The HLN6337 is enhanced and will work. The A2, B2, C2 and E2 control heads are limited function heads and their RSS code plug may not support any DEKs? I do not know if the HLN6338 motorcycle control head circuit board is enhanced or not. I do not have any information on A4, B4, C4 or E4 control head DEK compatibility. I do not have any information on Spectra II E4, E5 or E7 control head DEK compatibility (these will probably work with the correct control head circuit board).
• When adding DEKs, the larger connector of the HKN4273A (old part # 3080248L01) DEK cable goes to the left (the connection marked VIP or EXP) in the above drawing. The smaller connector that looks like a microphone connector goes to the right to the DEK in the above drawing.
• When using a A2, B2, C2, E2, A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7 or E7 control head, the microphone connector on the back of the control head housing or the microphone connector on the front of the control head may be used. The HLN6020, HLN6078 and HLN6075 control head circuit boards do not work with the HLN6432 rear microphone connector.
  •  
• The A9, B9, C9 or E9 HCN1071 is the only rear control head I know of at this time. The HCN1071 remote mount rear control head requires two DB-25 radio drawer connectors with the J6 Options connector and uses a HKN4378B cable attached to the J6 connector (this is different if you have a Systems 9000 Housing). The radio's code plug will also have to allow the use of a rear control head.
• The HLN6261B Interconnect Board has the Systems 9000 serial bus and Filtered Audio disabled on the second DB-25 J6 connector. A Spectra radio with this Interconnect Board can not be programmed from the J6 front DB-25 connector and will not support any Systems 9000 housings or rear control head options.
  •  
• If the retainer clips are broken off of the control head connector, use REX-1070B as a replacement.

The above view is looking at the back of the control head or DEK. Some control heads have another microphone connector on the control head face. Click on the hot spots above for the individual connector and cable pin outs that plug into the above connector.

VIP and VIP II Pin Outs
Control Head VIP Pins	DEK VIP II Pins	Description
4	15	VIP In 1
3	16	VIP In 2
37	17	VIP In 3
2	43	VIP Out 1
1	44	VIP Out 2
34	45	VIP Out 3
18	48	Switched B+
19	49	Switched B+
35	50	Switched B+
20	10	Ground
21	11	Ground
36	12	Ground

• The VIP and VIP II connector housings can use standard over the counter DB-9, DB-15, DB-25, etc., female pins and standard pin insertion/extraction tools. I prefer a metal pin extraction tool over the breakable plastic one Motorola sells.

Here are the Spectra Systems 9000 remote mount physical security housing control head hookups:

• A: Radio Drawer J5 remote mount to Physical Security Housing uses the HKN6034A or HKN6035A cable. The Physical Security Housing J2 / J5 to remote mount A9, B9, C9 or E9 control head uses the HKN4290A or HKN4292A cable. The optional VIP hardware uses a 15-80221J01 VIP Connector Housing.
• B: Radio Drawer J5 remote mount to Physical Security Housing uses the HKN6034A or HKN6035A cable. The Physical Security Housing J2 / J5 to remote mount A9, B9, C9 or E9 control head with 1 DEK, uses the HKN4290A or HKN4292A cable. The DEK is attached with a HKN4273A (old part # 3080248L01) DEK Interconnect Cable. The optional VIP hardware uses a 15-80212L01 VIP II Connector Housing.
• C: Radio Drawer J5 remote mount to Physical Security Housing uses the HKN6034A or HKN6035A cable. The Physical Security Housing J2 / J5 & J100 to remote mount A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7, E7, A9, B9, C9 or E9 control head uses the HKN6059A or HKN6060A cable. The optional VIP hardware uses a 15-80221J01 VIP Connector Housing.
• D: Radio Drawer J5 remote mount to Physical Security Housing uses the HKN6034A or HKN6035A cable. The Physical Security Housing J2 / J5 & J100 to remote mount A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7, E7, A9, B9, C9 or E9 control head with 1 DEK, uses the HKN6059A or HKN6060A cable. The DEK is attached with a HKN4273A (old part # 3080248L01) DEK Interconnect Cable. The optional VIP hardware uses a 15-80212L01 VIP II Connector Housing.
  •  
• The optional radio drawer Emergency button can be wired to the Physical Security Housing, as the control head cables are missing this wire. The radio does not have to be turned on for this radio drawer based Emergency function to work.
• The control head keypad, VIP or DEK VIP II ports can still have a RSS programmed Emergency key or button. These control head based Emergency functions will not work if the radio is turned off.
  •  
• See the above Systems 9000 remote mount control head configurations for specific information on adding additional DEKs.
• See the above VIP and VIP II pin out information.
• The Physical Security Housing has its own Keyloader Port, so it does not use the P506 radio drawer Keyloader Port or the P104 microphone Keyloader Port found on some control heads.
• There are some special considerations for the A4, B4, C4, E4, A5, B5, C5, E5, A7, B7, C7 or E7 control heads. First, the HLN6432 Systems 9000 connector converter board and 1502116Z02 rear plastic housing is required. Second, the very early and early control head boards will not work. Third, I assumed that a DEK or DEKs can be used with the Physical Security Housing Securenet. This will depend on having an enhanced control head that is also Advanced Securenet compatible (I have not seen any documentation that confirms this, but I do not think using an enhanced control head will be a problem). The later HLN6283 is called for on the A5, B5, C5, E5, A7, B7, C7 or E7 control heads (the HLN6337 or HLN6338 may also work, but the HLN6263 will not).
• J2 / J5 pin 1 may have a blue power wire with a fuse on it coming out of the Pysical Security Housing. This was only used by the Syntor X 9000 and Syntor X 9000E radios. Do not use this blue wire. In fact, J2 / J5 pin 1 will already have power on the blue wire from the radio's A+ line through J5 pin 20.
  •  
• The rear control head does not appear to be supported with the Advanced Securenet Physical Security Housing. The Physical Security Housing intercepts the microphone line from the front control head for use by the Securenet Board, before it is sent to the radio drawer J5 connector. This is not possible for a rear control head attached to the radio drawer J6 connector. The VF Sense and S.NET LED would also be a problem. There could be other problems as well.

Here are the Spectra Systems 9000 housing hookups:

The above drawing has "hot spots" you can click on for additional information.

• A: Radio drawer J6 remote mount. The HLN1185B or later revision Siren/PA housing use the HKN4363 cable.
• B: Radio drawer J6 remote mount. The YLD1008A and YLE1007A VRS housings use the HKN6038 cable.
• C: Radio drawer J6 remote mount. The YLD1005A and YLE1008A VRS & Siren/PA Combination housings use the HKN4363 cable.
• D: Radio drawer J6 remote mount. Same cable as B.
• E: The HLN1185B or later revision Siren/PA housing uses the HKN4304A T-cable when a VRS is already installed (the VRS must be first). There are some problems addressed below.
• Only one of the above A through D configuration connections is used in any single radio system.
  •  
• Problems daisy chaining a Siren/PA to a VRS. If you use a HKN4363B cable to the VRS with a HKN4304A T-cable to the Siren/PA, you will run into a problem. The HKN4363B cable does not have a pin 7 on the VRS connector and the HKN4304A T-cable uses pin 7 to transfer switched B+ to the Siren/PA at the end of the daisy chain. The Syntor X 9000 T-cable has a pin 7 that is shorted to pin 6 on the VRS connector, which is why the Syntor X 9000 uses this type of setup without any problems.
• Fix number 1: add a new pin 7 and a jumper it to pin 6 in the HKN4363B cable VRS connector. This requires a new pin 7 and a 6684690C02 contact pin removal tool to remove pin 6 to add the jumper wire.
• Fix number 2: add a jumper wire to the bottom of the VRS circuit board from pin 6 to pin 7.
• Fix number 3: open up the HKN4304A T-cable T-connector housing and swap pin 6 and pin 7. This requires a 6684690C02 contact pin removal tool and possibly a psychiatric visit after getting 39 pins to line back up with their tiny slots all together when reassembling the connector body.
• This daisy chaining problem has not been checked for on a HKN6038 cable (this cable could possibly short pins 6 and 7 on the VRS connector, which would mean it has no problem?).
  •  
• The Siren/PA Housing has space for up to two Internal Option Boards. These are only used with the Syntor X 9000 / 9000E radios. I am not aware of any Internal Option Boards that will work with a Spectra from inside the Siren/PA housing. This is also the reason the HLN1247 Systems 9000 External Options Housing, which only supports up to two of these Internal Option Boards, is not used with the Spectra.
  •  
• The early HLN1185A version of the Siren/PA does not work with the Spectra.
• The VRS model should end with a SP02. Some of the SP01 VRS functions work, but not all of them work with the Spectra.
• When one of the above Systems 9000 Housings is connected to a Spectra radio, a remote mount Spectra radio that has two DB-25 connectors with J5 and J6 is required. The Systems 9000 Housing cable is attached to the J6 connector.
• The HLN6261B Interconnect Board has the Systems 9000 serial bus and Filtered Audio disabled on the second DB-25 J6 connector. A low/med power remote mount Spectra radio with this Interconnect Board can not be programmed from the J6 front DB-25 connector and will not support any Systems 9000 housings or rear control head options.
  •  
• The A9, B9, C9 or E9 HCN1071 is the only rear control head I know of at this time. When a Systems 9000 Housing is used with a HCN1071 rear control head, the J6 radio connector and HKN4378B cable are not used for the rear head. Instead a HKN4376B rear control head T-cable or any Syntor X 9000 rear control head T-cable is used and is connected to the last Systems 9000 housing. It is done this way because Motorola did not make a T-cable equivalent type of connector for the Spectra J6 DB-25 radio drawer connectors. The radio's code plug will also have to allow the use of a rear control head.

HHCH notes:

Single Radio Drawer A3 HHCH	Dual Radio Drawer HHCH with SIU
Requires HLN6094 Command Board	-
HHCH Interconnect Board	Normal A9 Interconnect Board
HHCH MLM Board	Normal MLM Board
HHCH code plug	Special SIU code plug with 2 digit mode identifiers

• The older HLN6024, HLN6062, HLN6064 and HLN6074 Command Boards do not work in the single radio drawer HHCH. The HLN6094 and later variants do work with the HHCH.
• If you want to convert a single radio drawer HHCH for use with another control head (i.e. A2, A4, A5, A7, A9, B2, B5, B7, B9, C2, C5, C7 or C9), you will need a new Interconnect Board, new MLM Board, and a new code plug. The two Boards and code plug should be the correct ones for the control head type you are converting to.
• If you want to convert an A2, A4, A5, A7, A9, B2, B5, B7, B9, C2, C5, C7 or C9 radio drawer into a single radio drawer HHCH, you will need the correct Command Board, new HHCH Interconnect Board, new HHCH MLM Board and new HHCH code plug.
• If you want to convert a dual radio drawer HHCH for use with another control head (i.e. A2, A4, A5, A7, A9, B2, B5, B7, B9, C2, C5, C7 or C9), you will need a new code plug for the control head type you are converting to.
• Keep in mind there are cable and control head changes not mentioned above when converting radios.
• The HHCH uses directional, non-differential, synchronous serial communication with a clock line and without a busy line (this is similar to the MaraTrac control head communications). The HHCH single radio drawer has a special HHCH Interconnect Board that provides the necessary support for this type of synchronous control head communication. No other Spectra radios, including the HHCH dual radio drawer, uses this type of synchronous communication from the radio drawer. For the HHCH dual radio drawer, the SIU converts the HHCH pin out and control signals into Systems 9000 compatible pin out and control signals for the radio drawer. Systems 9000 uses differential, bidirectional, asynchronous serial communication with a bidirectional busy line at 9600 baud, which is totally incompatible with the HHCH synchronous serial communications.
• Each radio drawer in a dual radio drawer HHCH usually comes with an Advanced Securenet Physical Security Housing.
• There are tricks to changing MLM Boards and code plugs covered in the Batlabs Spectra pages.
• Be careful, the J5 DB-25 for the single radio drawer HHCH has a different pin out than other J5 DB-25 pin outs. The HHCH Interconnect Board is responsible for the different J5 pin out. For example, if you plug a remote mount A2, A4, A5, A7, A9, B2, B5, B7, B9, C2, C5, C7 or C9 control head into a single radio drawer HHCH J5 DB-25, it will apply the full power supply A+ voltage to the Speaker Audio Hi lead (pin 25). This might damage the Command Board audio amplifier chip.
• Keep in mind that all HHCH radio drawers have a J5 DB-25 connector, even the dash mount HHCH.
• The point is the single radio drawer HHCH has special parts that are different from any other Spectra radios. So, converting radios into a single radio drawer HHCH or from a single radio drawer HHCH is more complex than most other control head conversions.
• On the HLN6094 Command Boards, JU505 and JU506 are only installed for the single drawer HHCH and should be removed if converting from an HHCH to a different control head. There are probably other Command Board jumpers that should be changed.

Programming tips:

Here are some simple programming tips. The function key sequence to the programming screen will be given as a reference. When the function key list starts with "Main Menu", it is giving you a reference to the beginning menu the RSS starts with. When "Main Menu" is missing, it is assumes you are continuing on from the last programming screen mentioned (it is assumed you have already loaded a code plug into the RSS).

Conventional Zones:

Whenever the SCAN TYPE Priority List is set to Mode Slave, it causes the Dynamic Priority Assignment to only show as Not Available and the RSS will not let you change its setting or enable it. As soon as you enable Zones, the SCAN TYPE programming is hidden and no longer accessible. Therefore, if the SCAN TYPE Priority List is set to Mode Slave before you enable Zones, you will loose control over the Dynamic Priority Assignment. As long as you have control of the Dynamic Priority Assignment function, you can set it to Enabled or Disabled.

If you have Zones enabled and the Dynamic Priority Assignment function shows as Not Available, you will have to disable Zones in order to un-hide the SCAN TYPE Priority List selection if you want to get back control over the Dynamic Priority Assignment function. When you disable Zones, the RSS will totally forget ALL your Zone programming. Also, if you change the MDC SIGNALING when Zones are enabled, you will loose control of the Dynamic Priority Assignment function and have to disable Zones to change the SCAN TYPE to regain control. When you enable Zones again, you will have to reprogram all the Zones from scratch. The solution is to get everything set correctly, before you enable Zones the first time.

BTW, you can have a maximum of up to 25 Zones. Each individual Zone can include any mode you want to use that is programmed into the radio. Each Zone has its own unique scan list. Not all MLM firmware versions support Zones and the code plug must also allow Zones to be enabled.

To avoid loosing control of the Dynamic Priority Assignment function (Main Menu, F4, F2, F6), perform the following.

Before enabling Zones (Main Menu, F4, F2), first go to any mode on the Conventional Mode Configuration screen (F10, F5) and set SCAN to Enabled, then go to the Conventional Configuration screen (F10, F3). Under SCAN TYPE set the Priority List to Op Select. You can also set the Non_Priority List to Op Select if you want to (I am not sure, but I do not think this setting affects anything else after Zones are enabled). Set the MDC SIGNALING as Enabled or Disabled at this time, then leave this setting alone. Now you can enable Zones (F10, F2), then enter the Zone programming screens (F7) and program the Zones. Using the Zone Scan Options screen (Main Menu, F4, F2, F7, F8), you can still select slaved scan lists if you want them, so do not worry about the SCAN TYPE being set to operator select.

Here is a neat trick for disabling MDC SIGNALING without loosing control of the Dynamic Priority Assignment function (if you turn MDC back on later, it will still cause the Dynamic Priority Assignment function problem). Go to the Conventional Mode Configuration screen (Main Menu, F4, F5) and set the Call Signaling to DTMF and DTMF Options to Decode. A warning screen will appear and you select F2 CONTINUE. Now go to the Conventional Configuration screen (F10, F3) and MDC SIGNALING will be disabled without affecting the Dynamic Priority Assignment function. If you had gone straight to the Conventional Configuration screen (Main Menu, F4, F3) instead and disabled MDC SIGNALING, the Dynamic Priority Assignment function problem would have occurred.

Conventional DTMF Decode:

If the DTMF CALL OPTIONS (Main Menu, F4, F3, F2, F2) shows as "Not available for this model; please refer to catalog sheet.", try the following:

From the Conventional Mode Configuration screen (Main Menu, F4, F5), set the Call Signaling to DTMF, DTMF Options to Decode and Decode Call Type to Sel Call (if your RSS lets you). If MDC was enabled a warning screen will appear. If this happens and you select F2 CONTINUE, all MDC SIGNALING will be disabled. Now go back to the Conventional Configuration DTMF Signaling Options screen (F10, F3, F2). If a new section of DECODER OPTIONS appeared, then the DTMF CALL OPTIONS screen (F2) will now work.

DTMF decoding and MDC SIGNALING can not both be enabled at the same time.

If you are using Zones, remember that enabling MDC SIGNALING in the future (which will disable DTMF Decoding) will cause the Dynamic Priority Assignment function control problem.

Not all MLM firmware versions support DTMF decoding and a special DTMF circuit board plugged into P501 inside the radio drawer is required. If you program DTMF decoding without all the right stuff, it simply will not work.

The "Not available for this model" message is misleading, as it really depends on the RSS selections. DTMF decoding is not available if the radio drawer has an internal Securenet board installed in P501.

VHF model note:

The optional receiver preamplifier found in Spectra VHF radios is implemented with some resistor changes (the printed circuit board is the same). This means the non-preamp model has different resistors that cause the front end to be less sensitive, but also have improved interference rejection (this is a big plus in an urban environment with lots of RF pollution). The parts list and circuit board component layout is located in the detailed service manual.

BTW, the UHF preamplifier option is more complex. It has a transistor, capacitors and resistors that have to be changed out on a hybrid sub-straight.

PL, Private Line, DPL, Digital Private Line, MPL, Talkaround, MDC-600, MDC-1200, MVS-20, Securenet, Smartnet, Smartzone, Privacy Plus, Smartnet, Touch Code, Quick Call II, Channel Scan, Talkback Scan, Systems 9000, MaraTrac, Mitrek, Micor, Spectra, Spectra II, Astro Spectra, MataTrac, Syntor, Syntor X, Syntor X 9000 and Syntor X 9000E are trademarks of Motorola Inc.