| - 64 MODE SYNTOR X | |||
| - 64 Mode Explanation | |||
| - 64 Mode Programming | |||
| - 64 Mode Control Head Conversion | |||
| - 64 Mode Notes | |||
| - Syntor X Home | |||
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There is enough room in the EEPROM for 64 modes, but all of the scan controls and mode displays are only set up for 32 modes. The M6 mode line is used during Mode Select to select the normal bank of 32 modes (1-32) or the upper bank of 32 modes (33-64). The way to think of this is more like an electronically switched EEPROM replacement. If M6 is in the 1-32 position you have 32 usable modes and if M6 is switched to the 33-64 position it is really more like someone unplugged the old 1-32 EEPROM and plugged in a new EEPROM (i.e. you now have 32 new modes). The control head interface will treat modes 33 through 64 as if they were numbered as modes 1 through 32 for scanning and display purposes. This is not true 64 mode operation, just the ability to switch between two different code plugs of 32 modes each, allowing you to have up to 64 different modes. Of course the EEPROM is not really unplugged and a new one plugged in, that is just a metaphor.
For example: lets say mode 22 is an important mode you scan as the primary priority mode all the time. You can only scan mode 22 when a mode from 1 to 32 is selected before the scan is initiated. If you select a mode from 33 to 64 before you start the scan, mode 22 will not be accessible. The remedy for this simple example would be to program mode 54 to be exactly the same as mode 22. The mode 54 EEPROM primary priority mode would still be set to mode 22 (remember no scan modes beyond mode 32 can be programmed and 54-32=22). Of course, because you have now duplicated a mode in 22 and 54 you can only have 63 different modes in the radio.
If you select a mode from 33 to 64 and initiate a scan, the radio will use the information in the EEPROM as if modes 33 to 64 were actually numbered as modes 1 through 32. Remember, you can not program any scan beyond mode 32 in the EEPROM and the control heads can not display any mode beyond mode 32. The radio will keep track of and remember you are really using the upper bank of 32 modes (modes 33 to 64).
The Operator Select Multiple PL/DPL Encode and Decode (i.e. MPL - photo) uses the upper half of this memory where the other 32 modes (33-64) go. The MPL control head can still be used if you are willing to program a bank of up to 8 modes with PL/DPL information for the MPL (you will be stuck with the PL/DPL codes for the MPL in these modes). Lets just say it's not very practical, so consider MPL and full 64 mode operation to be incompatible. However, if you have 8 modes you want to program as receive only you can program 8 Tx MPL codes without causing any problems.
The big question is how do you program a 64 mode Syntor X Code Plug? It's simple, just make two separate 32 mode binary Code Plugs. Use a binary editor or programming utility to paste one above the other in a file. Each 32 mode Code Plug is 512 bytes long (0x200 bytes in hexadecimal) so both of them will be 1024 bytes long (0x400 bytes in hexadecimal) when combined. Then program the EEPROM using the modified file. The 32 mode Code Plug stored in the mode 33 to 64 EEPROM positions will become modes 33 to 64 and all of the scan information will have been correctly programmed within the 32 mode limits. See the code plug Memory Map for location details.
64 mode control head conversion:
In order to access the new modes from 33 to 64, the mode select control head must be modified. This is not quite as easy as it sounds. If you do not have System 90*s accessories that generate a "Mode Strobe" signal, a diode from the M6 line is switched to ground to select modes 1 to 32 and opened to select modes 33 to 64. If you do have System 90*s accessories that generate a "Mode Strobe" signal, a diode from the M6 line is switched to the "Mode Strobe" signal to select modes 1 to 32 and opened to select modes 33 to 64.
The other problem is M6 is already connected to either ground or the "Mode Strobe" signal in the existing control head. The System 90*s 8 mode control heads have a jumper that must be changed to allow M6 to select modes 33 to 64.
TRN4344A - 8 Mode without display - Move JU10 from A to B (gnd.)
TRN4338A - 8 Mode with Display - Move JU9 from A to B (gnd.)
TRN4336A - 8 Mode with Display - Move JU11 from A to B (gnd.)
Sometimes jumper position A is labeled "CHS" on the
circuit board.
Keep in mind that the TRN4338 will have problems with the false mode 32 display.
Do not forget the control head must first be jumpered and/or modified for 32 mode operation before it can be converted to 64 modes.
Syntor X compatible clamshell control heads do not have a jumper for this. First find diode CR4 inside the clamshell control head. One end of CR4 is connected to the 22 pin blue connector pin 14 Mode 6. The other end of CR4 is connected to a BLK/WHT wire (be careful, there are other BLK/WHT wires that go to other diodes). The other end of this BLK/WHT wire should be disconnected and reconnected to the switch. The common terminal of the switch should then be connected to the same place the BLK/WHT wire was removed from. In this case CR4 becomes the diode in the above drawing. The switch can be mounted inside or outside the clamshell control head (the wires may have to be lengthened). However, if you want to avoid making any changes inside the clamshell control head, the Mode 6 wire from pin 14 on the 22 pin blue connector can be removed from the blue connector and rewired to an external 64 mode modification (see drawing above).
Hand Held Control Heads (HHCH) can be jumpered for 64 mode operation and it will display all 64 modes. The reason it can display 64 modes is because of the microprocessor controlled Hand Held Control Head Interface Board that is installed inside the Syntor X radio. See the Motorola 68P80100W43 HHCH manual for details. The HHCH does not support MPL so there is no EEPROM memory conflict with this control head. This is the only Motorola factory control head that supports 64 modes so I would assume the factory 64 mode programming was only available for HHCH equipped radios.
Many other places in this web site say there are only 32 modes or 32 modes maximum. I am not going to change this because the 64 mode operation is really two separate 32 mode Code Plugs, it causes problems with MPL codes and the programming for scanning (i.e. scan mode numbers) is still done as if there are only 32 modes (i.e. you can only scan the lower 32 or upper 32 modes depending on the mode select setting, never all 64 modes at once).
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