Radio Alignment Procedures
26
2. Left-click the PTT Toggle button on the screen to make the radio
transmit. The screen indicates whether the radio is transmitting.
3. Measure the transmit RF frequency with your service monitor.
4. Adjust the reference oscillator’s softpot value until the measured
value is as close as possible to the frequency shown on the screen.
See Table 13.
5. Left-click the Program All button on the screen to dekey the
radio and save the tuned values.
6. Left-click the Close button on the screen to return to the
Transmitter Alignments menu.
Transmit Power
Alignment
This alignment procedure adjusts the transmit power of the radio and
must be performed for three different power levels (Low, Mid, and
High), at multiple frequencies for each power level, to allow for proper
alignment across the entire RF band. The RF band is divided into
frequency zones with a calibration point (value) in each zone.
NOTES:
• The same softpot attenuation value will result in DIFFERENT
radio output power levels at different frequencies.
• All power measurements are to be made at the antenna port.
• Transmit Power alignment is required after replacing (or
servicing) the transceiver board.
1. Select the TX Power alignment screen. The screen will indicate the
transmit frequencies to be used. See Figure 9.
2. Left-click the desired frequency field (starting with the highest
frequency shown).
3. Left-click the PTT Toggle button on the screen to make the radio
transmit. The screen indicates whether the radio is transmitting.
4. Measure the transmit power of the radio with a service monitor.
5. Adjust the softpot value until the required power, as shown in
Table 14, is indicated on the service monitor.
6. Repeat the above process for all frequencies and all power levels.
Table 13. Reference Oscillator Alignment
Band Target
700/800 MHz ±100 Hz
Table 14. Transmit Power Settings
Power Level
Test Frequencies
700/800 MHz
Low (1 Watt) 1.2W - 1.4W
Mid (2 Watts) 2.5W - 2.7W
High (3 Watts) 3.2W - 3.4W
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