Antenna Aiming-For Directional Antennas - GE MDS Mercury Series Reference Manual

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Record the current transmitter power output level, then set it to 30 dBm
for the duration of the test to provide an adequate signal level for the
directional wattmeter.
Procedure
1. Place a directional wattmeter between the
the antenna system.
2. Place the transceiver into the Radio Test Mode using the menu
sequence below:
(Maintenance/Tools Menu>>Radio Test>>Radio Mode>>Test)
3. Set the transmit power to 30 dBm. (This setting does not affect the
output level during normal operation—only during Test Mode.)
(Maintenance/Tools Menu>>Radio Test >>Test Mode>>Test>>Test Transmit
Power)
4. Key the transmitter.
(Maintenance/Tools Menu>>Radio Test>>Test Mode>>Test>>Test Key>>
enabled)
Use the PC's spacebar to key and unkey the transmitter.
(Enable/Disable)
NOTE: The Transmit Key has a 10-minute timer, after which it unkeys
the radio. Manually unkey the transmitter by selecting
Key>>disabled
radio's DC power.
5. Measure the forward and reflected power into the antenna system
and calculate the SWR and power output level. The output should
agree with the programmed value set in the Radio Configuration
Menu.
(Radio Configuration>>Transmit Power)
6. Turn off Radio Test Mode.
(Maintenance/Tools Menu>>Radio Test>>Test Key>>disabled)
End of procedure.
4.2.2 Antenna Aiming—For Directional Antennas
Introduction
The radio network integrity depends, in a large part, on stable radio
signal levels at each end of a data link. In general, signal levels stronger
than –80 dBm provide the basis for reliable communication that
includes a 15 dB fade margin. As the distance between the Access Point
and Remotes increases, the influence of terrain, foliage, and man-made
obstructions become more influential, and the use of directional
antennas at Remote locations becomes necessary. Directional antennas
require fine-tuning of their bearing to optimize the received signal
Mercury Reference Manual
on the menu, or temporarily disconnecting the
antenna connector and
TX
05-4446A01, Rev. C
Test