Cisco Cisco 870 MHz GainMaker Amplifiers Guía De Instalación
Balancing the Forward Path
73
2 Measure the output level at the highest design frequency, and compare this level
with the design level (on the design print), minus 1 dB.
The station output level must be 1 dB lower than the output level specified by
the design print. This reduction in output level will be offset by an increase in
internal line extender gain as the thermal circuit in the line extender warms up.
The station output level must be 1 dB lower than the output level specified by
the design print. This reduction in output level will be offset by an increase in
internal line extender gain as the thermal circuit in the line extender warms up.
3 Is the measured output level within ±0.5 dB of the design level minus 1 dB?
If the output level is within ±0.5 dB of the design output level minus 1 dB,
proceed to step 5.
proceed to step 5.
If the output level is more than the design output level minus 1 dB, replace
the forward input pad with a higher value pad.
the forward input pad with a higher value pad.
If the output level is less than the design level minus 1 dB, replace the forward
input pad with a lower value pad.
input pad with a lower value pad.
4 Repeat steps 2 and 3 until the output level is correct.
5 Proceed to Balancing the Reverse Path (on page 77).
5 Proceed to Balancing the Reverse Path (on page 77).
Forward Path Balancing for Manual Stations
Before you begin, make sure that you have configured the line extender module
according to the specifications in the design print, and that the line extender has
warmed up for approximately one hour.
according to the specifications in the design print, and that the line extender has
warmed up for approximately one hour.
No Switch 1 Setting for Manual Stations
A manual station is a station that has no Bode network installed. Therefore, there is
no interstage level correction, and Switch 1 has no effect on station operation.
no interstage level correction, and Switch 1 has no effect on station operation.
To Determine the Output Tilt
Complete the following steps to determine the output tilt of the line extender.
1 Connect the test point adapter to the forward main output test point.
1 Connect the test point adapter to the forward main output test point.