Installation Manual

Table Of Contents
14221-1850-4000, Rev. A
91
8. Verify the measured transmit output power is within the respective range:
Ø For VHF or UHF band transmission, compare the wattmeter’s reading with the target RF output
power range of between 39.8 and 63 watts (50 watts ±1 dB). This transmit output power range
assumes the radio is currently configured for high-power transmit.
Ø For 700 MHz band transmission, compare the wattmeter’s reading with the target RF output power
range of between 23.8 and 37.7 watts (30 watts ±1 dB). This transmit output power range assumes
the radio is currently configured for high-power transmit.
For 700 MHz band transmissions, if an interoperability channel is selected, the radio
will only transmit with approximately 2 watts of RF output power.
Ø For 800 MHz band transmission, compare the wattmeter’s reading with the target RF output power
range of between 27.8 and 44.1 watts (35 watts ±1 dB). This transmit output power range assumes
the radio is currently configured for high-power transmit.
9. If the wattmeter reading is within the range, record the measured value in the appropriate space on
the Installation Checklist
on page 98.
If the wattmeter reading is outside the range, verify the radio’s power supply voltage (i.e., battery
voltage) is within the specified range, recheck all connections and measure the RF output power again.
If this fails to produce a reading within the range, replace it and repeat this procedure. If problems
persist, contact the Technical Assistance Center (see page 97).
10. Repeat on test channels within the other RF bands, until at least one channel in all bands has been
tested.
12.3.2 Transmitting into The Mobile AntennaTesting the Antenna System
1. Turn off the radio.
2. Connect the antenna cable from the vehicle-mounted antenna to the wattmeter as shown in Figure 12-1.
3. Turn the radio on and set it to a VHF P25 conventional channel allocated for radio testing. This should
be the same channel that was used during the previous test procedure.
When transmitting into an antenna, always observe and follow all RF exposure-
related safety information presented in the Product Safety Manual.
4. Position the wattmeter’s slug to measure forward RF output power. Rotate it if necessary. The arrow
on the face of the slug must point away from the radio and towards the antenna for forward power
measurements.
5. Set the wattmeter to measure peak RF power.
6. Key the radio’s transmitter via the microphone’s PTT button.
Transmit only for as long as needed to take the measurement, then immediately disable
the transmission.
NOTE
NOTE