Icom IC-H12, Руководство по обслуживанию

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2. Se the channel select switch at a programmed channel.
• I n he recei e mode, adjust L211 for the programmed receiving frequency minus 10.695MHz.
• In he ransmit mode, adjust L 212 for the programmed transmitting frequency.
• S e he channel at a duplex channel, and adjust L213 for the desired transmitting frequency.
• en chec again, because these adjustments interact.
3. Con irma ion
Chee eac frequency:
JI
requencies should be within ±500Hz.
7
·
5
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2 TRA NSMISSI ON
3 .
Po· e dj s ent
2.
3 .
Connec ion o measuring instruments and setting of the knobs.
nect T o 50 ohm power meter.
• C o ec
2
ol meter and variable voltage power supply to the set.
CAUTIO
:
Applying over 10.SV can damage the P.A. transistor.
• Se e channel select switch at a programmed channel.
hrough L222 and C285, C286, C290 and C291 for maximum power output while
s i g P T s i ch.
rren drain exceeds 800mA, adjust C291 to set the current at 800mA, and repeat
res.
output, less than 800mA current drain.
\o aonor ali in operation should be found if the supply voltage is varied from 5.5V to 1 0 .SV.
stment
Power
Supply
(5�11V)
RF
wattmeter
e measuring instrument and the settings of the controls.
T Connector to a deviation meter with a directional coupler or attenuator.
e
e e ilter shall be a High Pass Filter 50Hz, L.P.F.
2 0KHz. De-emphasis OFF.
a,nel s e l ec t switch at a programmed channel.
• Co
F oscillator, with AF millivoltmeter in parallel, to the mic input.
1KH z 120mV R MS. During transmit, adjust R171 on the main unit for
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