Section V - Operation - Icom IC-21 Instructions Manual

SECTION V — OPERATION
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Initial Preparations:
a.
b.
Connect the microphone to the microphone jack.
Connect the antenna to the antenna coax connector. Make sure the coax line is of
the correct impedance (50 ohms) and is neither shorted nor open circuited.
Make sure the power switch is in the off position, then connect the power supply
cable to the power supply receptacle. For AC operation make sure you use only the
AC cable, and connect to an AC source. (see transformer wiring instructions
for other voltages). For DC operation the red lead should be connected to the
positive side of the power source and the black lead. to the negative side. In the
event that these leads are improperly connected the IC-21 will not function. No
damage will be incurred, since protection is provided in the IC-21 for this purpose.
Turn the volume control to the maximum counter-clockwise position, and the
squelch control to the minimum on position. Set the S and SWR Meter Switch
(#12) to S and RF position, and the RIT Control (#5) to Off or the center
position.
Operation:
a.
b.
Set the power switch (#1) to On and the channel indicator and meters will be
illuminated, and the КЕСУ indicator (#10, blue) will light up.
Switch Channel Selector (#6) and Course (#7) to desired channel.
Reception:
a.
Adjust the volume control to a comfortable listening level of noise, if no signal is
present. |
Transmitting: | |
а.
b.
Set the Hi-Low Switch (#13) to Low, turn the power switch on, then set the
Receive and Transmit Switch (#2) to the transmit setting, or push the PTT button
on the microphone and the set is ready for transmitting. At the same time the
indicator light will be illuminated in red (XMIT) and the blue (RECV) light will go
out, the meter will be illuminated, and will provide an indication of the relative
power output of the transmitter. The pointer will be on or near the red mark on
the meter scale when on high power, and just a little over one on low.