- Hand Held Control Head (HHCH)
     - Types of HHCH
     - System Interface Units
     - HHCH Manuals
     - HHCH SIU Configurations
       
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[SYNTOR] [SYNTOR X] [SYNTOR X 9000 and X 9000E] [TRUNKING SYNTOR X and SYNTOR X 9000] [SPECTRA]

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Types of HHCH:

There are two distinct types of HHCH units. This section will provide some limited information to help understand the important differences and to identify Motorola documentation on HHCH radios.

The HHCH is an inherently limited control head because it has so few control switches on it. Some of the HHCH units that use external System Interface Units (SIU) have connectors for separate control switch boxes (i.e. like a Siren control box). These control boxes must be mounted separately from the HHCH unit and they extend the control capabilities of HHCH equipped radios. Most HHCH units are also limited to a pair of seven segment LED displays. This limits the mode display to 99 modes maximum (Motorola does not use mode 00). The Syntor X group and zone HHCH units use a fourteen segment display for A, B, C and D display on the first digit (it is similar to the Syntor X pushbutton control head arrangement) and a seven segment display for the second digit.

The first type of HHCH unit is used on the Syntor X radios. These do not use any Surface Mount Devices (SMD) and all the switch outputs are individually connected directly to wires in the HHCH cord. There are two versions of these. One version has two seven segment LED displays. The other version has one 14 segment LED display and one seven segment LED display. Different cords/connectors, toggle switches and escutcheons are used on different models as well. Remember, the Syntor X radio drawer requires specific code plug programming to accommodate an HHCH.

The second type of HHCH unit is used on the Syntor X 9000, Spectra and MaraTrac radios. These have some SMD components and the switch outputs are routed through an 8 bit shift register chip. This shift register converts the switch outputs into a synchronous serial data stream, which requires fewer wires in the HHCH cord. Different cords/connectors, toggle switches and escutcheons are used on different models as well.

These two different types of HHCH units are not interchangeable at all. The difference between the hard wired switches and the serial data output switches each require specific hardware to make them work. There is no hardware available that can work with both types of HHCH switch configurations (i.e. the switches are radically different).

Different HHCH models can have different cords with unique connectors. This may mean that certain HHCH units only work with the particular hardware they were designed for, even though the actual HHCH electronics may be otherwise identical.

The Syntor X HHCH is not compatible with any any other HHCH units. According to the documentation artwork, these HCN4026, HCN4027, HCN4028, HCN4029 and YCN4018 HHCH units use printed circuit board part number 84D80086H02 for the upper board (i.e. the one with the two 7 segment displays on it) and 84D80036H02 for the lower board (execpt for the YCN4018, these models also have jumper JU6 "Scan Program Switch"). The YCN4018 lower board does not use JU6 or Q3, and it has custom wiring to the first 7 segment display decimal point on a line marked CALL. The YCN4014, YCN4015 and YCN4017 HHCH units use printed circuit board part number 84D06116T01 for the upper board (i.e. the one with the 14 segment and 7 segment display on it) and 84D06117T01 for the lower board. Different toggle switches and escutcheons are used, depending on the HHCH model. The correct HHCH model should be used with its corresponding System Interface Unit or HLN4728 Interface board (since the interface does all the real work, not the HHCH, the interface and its cables determines what switches, escutcheon and model is required for the HHCH). Remember, these use hard wired switches.

The Spectra and MaraTrac HHCH are compatible with each other (except for the cords and connectors). The Syntor X 9000 and Spectra Dual Radio HHCH has some modifications. According to the documentation artwork, the Spectra and MaraTrac HHCH units both the same use printed circuit board part number 84D80151N01 for the upper board (i.e. the one with the two 7 segment display on it) and 84D80150N01 for the lower board. The Syntor X 9000 and Spectra Dual Radio HHCH units use printed circuit board part number 84D80151N02 for the upper board (i.e. the one with the two 7 segment display on it) and 84D80150N02 for the lower board. The difference on the Dual Radio units is an 820 ohm R1057 resistor was added on the lower board between the Mic Hi line and ground (it is connected to the PTT switch that switches the Mic Hi line and is only in the circuit when the PTT is not pressed). On the upper board, jumper JU1001 was added between J2 pin 2 and U1001 pin 17 and 18. Then a 100 ohm R1026 resistor was added between devices U1001 pins 17, 18 and DS1001 pin 1. Then J2 pin 2 was relabeled from HUB to S'NET ON LED. Remember, these use synchronous serial data switches.

I do not know if the Syntor X HHCH units with the two seven segment displays, and the Syntor X HHCH units with the one fourteen segment and one seven segment display are interchangeable or not. I also not know know if they can be modified to be interchangeable or not.

The Syntor X hard wired HHCH switches depend on the cable the HHCH cord plugs into for the correct wiring/functions. The Syntor X 9000, Spectra and MaraTrac HHCH switches do not depend on any special cable wiring because the radio drawer or SIU simply interprets the serial switch data the way it wants to (i.e. the HHCH switch escutcheon labels had better match whatever it is expected to be).

 

System Interface Units:

With the exceptions of the Syntor X with the internal HLN4728 HHCH Interface board, Spectra single radio drawer HHCH and the MaraTrac HHCH; an external Systems Interface Unit (SIU) box is required to make the HHCH interface compatible with the radio drawer or drawers. All of these external SIUs have on board microprocessors to perform the HHCH to radio drawer interface tasks.

Syntor X HHCH External System Interface Units:

MaraTrac Single Radio HHCH External System Interface Unit:

Spectra Single Radio HHCH External System Interface Unit:

Syntor X 9000 and Spectra Dual Radio HHCH External System Interface Unit:

Syntor X HHCH Model Numbers

Model

Features
 HCN4026  Securenet, 2 Digit Display (JU6 removed)
 HCN4027  Securenet, Non-Priority Scan Control, 2 Digit Display (JU6 installed)
 HCN4028  Non-Priority Scan Control, 2 Digit Display (JU6 installed)
 HCN4029  2 Digit Display (JU6 removed)
 YCN4014  Securenet, Zone/Channel Display
 YCN4015  Securenet, Group/Channel Display
 YCN4017  Securenet, Dual Code, Group/Channel Display
 YCN4018  Dual Radio, Securenet, 2 Digit Display

 

Syntor X 9000 / Spectra / MaraTrac HHCH Model Numbers

Model

Radio Model
 HCN1051  MaraTrac
 HCN1053  Spectra
 YCN4021  Syntor X 9000 Dual Radio, probably Spectra Dual Radio

 

HHCH Manuals (listed in the same order as the SIU listing above)
Part # Description
 68P06037T96  Syntor X Option W356AASP HHCH with Securenet and Siren
 68P06088T27  Syntor X Option W766AASP HHCH w/ Securenet
 68P06273T37  Syntor X Option W303AFSP HHCH w/ Dual Code Securenet
 68P06038T16  Syntor X HHCH Dual Radio Accessory Group
 68P80100W43  Syntor X Hand Held Control Head
 68P80102W39  MaraTrac 29.7-50 MHz (AK Models)
 68P80102W95  MaraTrac 29.7-50 MHz (BK Models)
 68P80102W18  MaraTrac VHF (AK Models)
 68P80102W94  MaraTrac VHF (BK Models)
 68P80102W21  MaraTrac UHF (AK Models)
 68P80102W87  MaraTrac UHF (BK Models)
 68P80102W61  Spectra Later Version Detailed Service Manual - VHF, UHF, 800 MHz and 900 MHz
 68P07992D43  Syntor X 9000 HHCH Dual Radio System w/ Securenet
 68P07993D06  Spectra HHCH (A3) Dual Radio T83 and T84 Models

 

The following part number list examples have been provided since the Syntor X HHCH units depend on the correct combination of HHCH, HHCH radio cable and SIU box or Internal Interface board to work correctly.

 

Syntor X YLN1046 SIU configuration:

 

Syntor X YLN1056 SIU configuration:

 

Syntor X YLN1056ASP02 SIU configuration:

 

Syntor X Dual Radio YLN1097A SIU configuration:

 

Syntor X HLN4728 Interface board configurations:

Non-Securenet:

Securenet:

The combination of the HHCH middle toggle switch (this depends on the HHCH model), the HHCH JU6 jumper and the radio cable that attaches to the HHCH cord all work together. A HCN4028 HHCH and HKN4215 cable would be the wrong combination, even though the HHCH connector will fit into the HKN4215 cable connector. The HKN4215 cable will route the HHCH middle toggle switch to different HLN4728 Interface board contacts than the correct (for the HCN4028 HHCH) HKN4216 cable will.

 

Here is some Syntor X 9000 dual radio HHCH information. Here are some Spectra HHCH notes.

 

[SYNTOR] [SYNTOR X] [SYNTOR X 9000 and X 9000E] [TRUNKING SYNTOR X and SYNTOR X 9000] [SPECTRA]

[PL] [DPL] [PAC-PL and PAC-RT VEHICLE REPEATERS] [HHCH] [PROM PROGRAMMERS] [POWER WIRING]

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