Alignment
PLL & Transmitter Alignment Points
0
Set the transceiver to the 174.000 MHz*, and
adjust coil L303 on the VCO Unit for 7.5 V on
the voltmeter.
*For transceiver versions without extended receive
capability, tune to
146.000 MHz
and adjust
L303
for
1.8
Von the voltmeter.
0
Next tune to 146.000 MHz, key the transmitter,
and adjust L304 for 1.8 V on the voltmeter.
PLL Reference Frequency
0
With the wattmeter, dummy load and fre
quency counter connected to the antenna jack,
and while tuned to 1 46.000 MHz, key the
transmitter and adjust TClOOl on the Main
Unit, if necessary, so the counter frequency is
within 100 Hz of 146.000 MHz.
Transmitter Output
0
Preset trimmer potentiometers VR2 003,
VR2004 and VR2005 fully clockwise.
0
While tuned to 146.000 MHz, press the
LOW
button on the panel to select high, mid- and
then low power while adjusting the corre
sponding trimpot for the transmitter power
output levels listed in the table:
Panel Power
Adjustment
Power Output
Selection
High
VR2005
50±5W
Mid
VR2003
25±1W
Low
VR2004
5±1W
Transmitter Deviation
0
While tuned to 146.000 MHz, adjust the AF
generator level for 50 m V output
@
1 kHz to
the
MIC
jack.
0
Key the transmitter and adjust VR2002 on the
CN T L Unit for ± 4.5 kHz deviation on the de
viation meter (within 100 Hz).
Содержание FT-2500M
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