Harris Corporation RF Communications Division XG-100LPA Manuale Utente
14221-1200-4010, Rev. B
82
17.3 MRU TRANSMITTING INTO ITS ANTENNA
1. To verify transmit output power of the MRU, perform the test procedure presented in the previous
section (Section 17.2).
2. Turn off the XG-100M mobile radio.
3. Disconnect the 50-ohm load/terminator from the wattmeter.
4. Connect the cable from the vehicle-mounted MRU antenna (cable labeled “MRU Antenna”) to the
wattmeter’s output connector, as shown in Figure 17-1.
5. Turn on the radio via the control head’s on/off volume control (or externally-mounted switch). The
radio powers-up.
When transmitting into an antenna, always observe and follow all RF exposure-related
safety information presented in the Product Safety Manual.
6. Set the XG-100M to test a conventional channel. Recommend using the same channel that was used
when performing the previous procedure.
It is recommended that a test conventional channel be allocated for this testing. Otherwise,
interference with other radio users in the system may occur. Also, during transmissions,
always observe the RF exposure-related safety information presented in Section 1.2 of
this manual (begins on page 7).
7. No change in the position of the wattmeter element should be necessary. The arrow on the face of the
element must be pointing away from the MRU and towards the antenna for forward power
measurements.
8. Set the wattmeter to measure peak RF power.
9. Key the transmitter via the microphone’s PTT button.
Transmit only for as long as needed to take the measurement, then immediately disable the
transmission.
10. For an 800 MHz band transmission, compare the wattmeter’s reading with the target RF output power
range of between 22.1 and 55.5 watts (35 watts ±2 dB). This transmit output power range assumes
the Unity mobile is currently configured for high-power transmit.
For a 700 MHz band transmission, compare the wattmeter’s reading with the target RF output power
For a 700 MHz band transmission, compare the wattmeter’s reading with the target RF output power
range of between 15.1 and 23.9 watts (19 watts ±1 dB). This transmit output power range assumes
the Unity mobile is currently configured for high-power transmit.
For a 50-Watt VHF and UHF band transmission, compare the wattmeter’s reading with the target RF
For a 50-Watt VHF and 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 Unity mobile is currently configured for high-power transmit.
NOTE
NOTE