User's Manual

CHAPTER 4: PRODUCT INSTALLATION
2003 IPMobileNet, Inc. 20 IPSeries MR User Manual / Rev. A / 04-September-03
Step 7 Once the adjustment is made, connect the base station to the external amplifier and connect
the wattmeter and dummy load to the amplifier’s output.
Step 8 Measure the power output of the amplifier.
! If the amplifier does not produce the expected power, additional adjustments to the
base station output are necessary. When making large adjustments in power, the
external amplifier should be disconnected from the base station and the base
station’s power reset.
1 Do not attempt to make large adjustments to the output power while the base is connected to the
external amplifier or if the external amplifier is not producing any power. The base station power
adjustment is very sensitive and it is possible to overdrive an external amplifier and ruin it with
just small movements of the power adjustment potentiometer. You must be sure to keep the
base station’s output power below the input drive limit of the external amplifier.
Step 9 Once the base station power is adjusted, reconnect the base station and the wattmeter to the
external amplifier and measure the output power of the external amplifier again using the
X=1450,10 command.
Step 10 Once the power amplifier is nearly at the proper output, small adjustments can be made to
the power output, while the base station is connected. Turning the power adjustment very
carefully while transmitting into the external power amplifier will enable the power to be
adjusted to exactly the right level.
1 Be careful not to apply sideways pressure to the adjustment potentiometer, otherwise the circuit
can be damaged. Always use a light touch when adjusting base station output power.