Icom IC-F21 Service Manual page 14

Connection
Standard signal generator
0.1 V to 32 mV
(—127 dBm to —17 dBm)
CAUTION:
DO NOT transmit while
an SSG is connected to
the antenna connector.
FM Attenuator
deviation meter 40 dB or 50 dB
RF power meter
0.1—10 W/50 ‰
Frequency
DC power cable connections
NOTE:
When you adjust the output power (high
power), the battery type detector must be con-
nected to GND (see illustration at above).
Ohterwise the transceiver does not transmit high
power, the output power will be low.
to the antenna connector
counter
to [MIC]
to an RS-232C port
OPC-478
DB9 female plug
(incl. level converter circuit)
to [SP]
JIG cable
+
Battery type detector Battery type detector
5 - 3
Audio generator
Personal
computer
SINAD meter
Speaker (8 ‰)
DC POWER
SUPPLY
GND