27
1. Connect wattmeter and load to antenna connector.
2. Select high power center channel and adjust the PWR HIGH (FVR8) for 25 Watts (40 Watts on high
power models) or other desired power below maximum rated power.
3. Adjust FVC1 (FVC3) for maximum power and repeat step 2.
4. Check power at highest and lowest frequency and readjust FVC1 to balance the power. Power may
be slightly lower at band extremes but should not exceed -1 dB.
5.
Select low power center channel and adjust PWR LOW (FVR7) for ½ power or other low power
setting.
6. The Reverse Protect feature protects the power amplifier from damage due to reflected power if the
antenna becomes open or shorted. Select any high power channel. Key transmitter and adjust
REVERSE PROTECT (FVR9) until power supply current just begins to drop. Slowly adjust in the
other direction until current returns to normal. Repeat if necessary to make sure you have the
correct adjustment.
5.2.5 TRANSMITTER DEVIATION ADJUSTMENT
1. Select the low power, low frequency channel.
2. Connect dummy load or antenna to the transmitter.
3. Connect deviation meter using proper attenuation.
4. Connect microphone to the connector on the control unit.
5.
While speaking loudly and very close to the microphone, key the transmitter and adjust FVR2 for 4.8
kHz deviation.
6. Adjust FVR5 for 700 Hz deviation of the CTCSS tone (note that any background noise in the area
will be picked up by the microphone and cause an error in adjustment. Recheck step 5 if necessary.
7. If DTMF tones will be used, adjust FVR201 located on logic unit for 3 kHz deviation while holding the
5
key on the keypad.
8. Select the highest frequency channel and recheck deviation. Adjust Modulation Balance control
FVR301 in the VCO to balance the modulation on the highest and lowest frequency, if required.
9. Reassemble all covers.
5.3 DISASSEMBLY PROCEDURES
Note the positioning of the cables for reassembly later. Perform only the steps necessary for service
required.
Refer to EXPLODED VIEW for tag numbers (nn).
5.3.1
TOP COVER REMOVAL
I. Remove two black screws (36) from top cover (35).
2. Remove top cover (35).
