Specifications

4. The middle RX/TX frequencies should be halfway between the lowest and the highest frequencies.
• NOTE: There should be 4 channels programmed with a total of 3 different frequencies.
5. The highest transmit frequency can typically be only 10 MHz above the lowest receiver frequency.
PLL ALIGNMENT
1. Connect an RF dummy load or power attenuator (50 watt minimum rating) to the antenna receptacle.
2. Connect a VOM or DVM to TP1, accessed through a hole in the VCO cover.
3. Set the CHANNEL selector to the lowest receive frequency.
4.
Adjust TC13 setting the voltage measured at TP1 to 1.5 volts (±.05).
5. Change the CHANNEL selector to the highest transmit frequency.
6. Press the PTT switch. The VOM should read less than 7.5 volts.
7. Release the PTT switch.
CHANNEL
TP1 VOLTAGE
TRANSMIT RECEIVE
Lowest Frequency 1.5 VDC 2.0 VDC
Highest Frequency 7.5 VDC 7.0 VDC
TRANSMITTER ALIGNMENT
1. Connect a 50 ohm RF dummy load or a power attenuator (50 watt minimum rating) through a watt meter
(50 watt scale) to the antenna receptacle.
2. Turn RV2 (Automatic power adjustment) fully clockwise.
3. Connect variable DC power supply (10 Ampere capability) to the DC power cable on the radio. Set the
voltage to 13.8 VDC measured at the radio during transmit. (Voltage drops in the power cable during
transmit will lower the voltage at the radio).
4. Set the CHANNEL selector to a mid-frequency transmit channel.
5. Press the PTT switch.
• NOTE: The power output may exceed 50 watts.
6. Adjust RV2 for 40 watts, or the desired power output. (10 - 40 watts). Release the PTT switch.
MONOGRAM SERIES LBI-38865
ALIGNMENT PROCEDURE
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Nov. 94