Kenwood TKR-750 Service Manual page 12

TKR-750
3-3. KPG-46 Description (PC Programming Inter-
face Cable : Option)
The KPG-46 is required to interface the TKR-750 to the
computer. It has a circuit in its D-sub connector (25-pin)
case that converts the RS-232C logic level to the TTL level.
The KPG-46 connects the microphone connector of the
TKR-750 to the computer's RS-232C serial port.
3-4. Programming Software Description
The KPG-66D programming disk is supplied in 3-1/2" disk
format. The software on the disk allows a user to program
TKR-750 repeater via the programming interface cable (KPG-
46).
3-5. Programming With IBM PC
Data can be programmed into the flash memory in RS-
232C format via the microphone connector.
KPG-66D
12
REALIGNMENT
IBM PC
KPG-46
TKR-750
Fig. 1
4. Firmware Programming Mode
4-1. Preface
The TKR-750 uses flash memory to allow it to be easily
upgraded when new features are released in the future.
4-2. Connection Procedure
Connect the TKR-750 to the personal computer (IBM PC
or compatible) with the interface cable (KPG-46). (Connec-
tion is the same as in the PC mode.)
Notes :
You can only program firmware from the 8-pin micro-
phone connector on the front panel. Using the 25-pin logic
interface on the rear panel will not work.
4-3. Programming
1. Start up the programming software (Fpro. exe).
2. Set the communications speed (normally, 115200 bps)
and communications port in the configuration item.
3. Set the firmware to be updated by file name item.
4. Turn the TKR-750 power on with the [PF1] key held
down. Hold the key down for one second until the 7-
segment display changes to "P.G.". When "P.G." ap-
pears, release your finger from the key.
5. Check the connection between the TKR-750 and the per-
sonal computer, and make sure that the TKR-750 is in the
program mode.
6. Press write button in the window. A window opens on
the display to indicate progress of writing.
7. If writing ends successfully, the TX LED on the TKR-750
lights.
8. If you want to continue programming other TKR-750s,
repeat steps 3 to 6.
Notes :
This mode cannot entered if the firmware program mode
is set to disable in the programming software (KPG-66D).
4-4. Function
If you press the [PF1] key (front panel), both decimal
point on the 7-segment display will disappear. The writing
speed is 38400 bps (low-speed mode). If you press the
[PF1] key again, the right hand decimal points will light. The
writing speed is 57600 bps (middle-speed mode).
Note :
Normally, write in the high-speed mode (115200 bps).