Specifications

• WARNING: To prevent damage to the radio, avoid keying the radio for periods longer than 1 minute. Allow a
5 minute cool down period after keying the radio for 1 minute.
7. Repeat step 6 above for the lowest, middle, and highest frequency transmit channel with the goal to achieve
the least variation in power output across the band.
8. Increase the power supply voltage to 13.8 VDC measured at the radio during transmit.
DCS Modulation Balance Adjustment
1. Connect test equipment to the radio as shown in Figure 4.
2. Set the CHANNEL selector to a transmit channel which has a DCS code pre-programmed (should be
mid-frequency channel).
• WARNING: The power attenuator must have enough attenuation to prevent damage to the Deviation Meter.
3. Press the PTT switch.
4. Observe the wave form on the Oscilloscope and compare with that shown in Figure 5.
5. Adjust RV5 and TC7 to achieve the proper wave form. Release the PTT switch.
DCS Modulation Waveform
6. Replace the deviation meter with a frequency counter.
7. Set the CHANNEL selector to the highest transmit channel. Ensure that this channel has no DCS or CTCSS
tones pre-programmed.
8. Press the PTT switch. Adjust TC6 for the correct transmit frequency. Release the PTT.
• NOTE: TC7 should not be allowed to be placed at the maximum capacitance position. If TC7 is found to be at
the maximum capacitance position, place TC7 at the typical position and adjust RV5 for the proper wave form.
30°
TC7 Maximum Capacitance Position
MONOGRAM SERIES LBI-38864B
ALIGNMENT PROCEDURE
Page -21-
Nov. 94