Adjustment for IC-F520
ADJUSTMENT
Adjustment No. Adjustment Condition & Tuning Value Ref. No. CK. Point
Preparation Connect the transceiver by cloning cable
(OPC-1122) to a PC (IBM compatible) and
boot up the cloning software.
Check points Be sure to use a tester with more than 50
kohm/V internal resistance during
each test.
Lock Voltage Set the transceiver to the 136 MHz
Adjustment and set the LV voltage as follows
C133 during RX, C134 during TX.
Adj. Freq. 136 MHz
RX Side 1.4V 1.4V C133 LV
TX Side 1.0V 1.0V C134
Lock Voltage Set the transceiver to the 174 MHz
Check and check that each value is within
following values.
Adj. Freq. 174 MHz
RX Side 3.5V~4.5V 3.5V-4.5V LV
TX Side 3.0V~4.0V 3.0V-4.0V
Frequency Connect a power meter or attenuator
Adjustment to the antenna terminal.
Loose coupling the antenna terminal
and frequency counter.
Set the transceiver to near the TX greatest
high band frequency and set the unit to TX.
Use adjustment software to adjust the TX
frequency to following values.
Set Frequency Set Freq. ± 500 Hz ±500Hz Adj.Soft ANT Con
TXF
