Transmit Power Alignment; Table 12.Transmit Power Settings - Motorola XTS 2500 Basic Service Manual

Transmit Power
Alignment
This alignment procedure adjusts the transmit power of the radio and must be performed
for three different power levels (Low, Mid, 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 12, is indicated
on the service monitor.
Low (1 Watt)
Mid (2 Watts)
High (3 Watts)
6. Repeat the above process for all frequencies and all power levels.
Table 12. Transmit Power Settings
Test Frequencies
Power Level
700/800 MHz
1.2 - 1.4W
2.5W - 2.7W
3.2W - 3.4W
Radio Alignment Procedures
23