Icom IC-F21

5 - 3
to an RS-232C port
Personal
computer
to [MIC]
to [SP]
JIG cable
DB9 female plug
(incl. level converter circuit)
Connection
to the antenna connector
RF power meter
0.1—10 W/50 ‰
Frequency
counter
Attenuator
40 dB or 50 dB
FM
deviation meter
Standard signal generator
0.1 V to 32 mV
(—127 dBm to —17 dBm)
SINAD meter
Speaker (8 ‰)
Audio generator
OPC-478
CAUTION:
DO NOT transmit while
an SSG is connected to
the antenna connector.
DC POWER
SUPPLY
GND
+
Battery type detectorBattery type detector
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.