Adjustment Mode - Kenwood UBZ-LJ8 Service Manual

Adjustment Mode

■ Storing the Adjustment Value for the CTCSS
Deviation, Battery Voltage Detection, Busy
(Squelch) Detection and VOX Gain Level
PTT
TX-RX unit
(A/2)
■ How to Store the Adjustment Value to the IC210
(EEPROM) on the TX-RX Unit (A/2)
If the adjustment data in IC210 is corrupted or the IC itself
is replaced for servicing, all the data must be re-adjusted and
stored as follows.
1. Turn the transceiver OFF.
2. Enter the adjustment mode by shorting the "WRITE" and
"GND" terminals, then press the [PTT] key and turn the
transceiver ON. After turning the transceiver ON, remove
the wire from the "WRITE" and "GND" terminals.
Note : You must preset the tone number to "24"(151.4Hz)
at the required channel prior to enter the adjustment
mode.
Otherwise, you cannot perform the "CTCSS Deviation"
adjustment.
3. The adjustment menu appears. It begins with "CTCSS
Deviation" adjustment.
4. The adjustment menu changes when you press the [UP]
or [DOWN] key.
5. Press the [MODE] key to enter the selected adjustment
menu. The adjustment value appears on the LCD and
blinks.
ADJUSTMENT
6. Adjust the value according to the instructions on each
item (Refer to "Adjustment instructions").
7. After adjusting the data value, press the [PTT] key to store
the new data to the EEPROM (IC210). If you do not wish
to store the adjusted data value to EEPROM (IC210),
press the [MODE] key. No data will not be stored to the
EEPROM (IC210) and the old data is retained.
WRITE
8. You can press the [REM1] key on the speaker-microphone
(if connected) to activate the Monitor function. (Please dis-
GND
able the monitor function in the Battery voltage detection
menu.) The adjustment menu can be up or down by
pressing the [REM2] or [REM3] key.
9. To exit "Adjustment mode", turn the transceiver OFF.
Note : Refer to the diagram on the page 18 to understand
how each adjustment can be performed.
■ Adjustment Instructions
• CTCSS Deviation adjustment
1. After entering the CTCSS Deviation adjustment mode, se-
lect the values with [UP]/ [DOWN] keys. Then press [PTT]
key to write the new value to the EEPROM (IC210).
2. Press [PTT] keys again to transmit. Confirm the CTCSS
deviation is 0.35kHz. If the deviation is not 0.35kHz, per-
form step 1 again to select different value, then measure
the deviation.
3. Perform step 1 and 2 until you get the deviation value
0.35kHz.
• Battery voltage detection adjustment
Set the DC power supply voltage to 3.20V and connect the
cable to the transceiver.
• Busy (Squelch) detection adjustment
Set your SSG (Synthesized Signal Generator) values as fol-
lows.
Frequency : 446.00625MHz (CH1)
Modulation frequency : 1kHz
Frequency deviation : 1.5kHz
Signal output : –123dBm (0.158µV)
• VOX gain level adjustment
Set the initial VOX gain value to 3C (in hexadecimal).
UBZ-LJ8
17