Cisco Cisco 1 GHz GainStar Amplifier Guía De Instalación
Chapter 3 Balancing and Setup
If the Signal Director is
installed
, add 20 dB (single input) or 23.5 dB (dual inputs)
to the measured levels to get the true input levels.
If the DC8 Directional Coupler is
If the DC8 Directional Coupler is
installed
, add 20 dB (single input) or 21.8 dB
(Main port input) /28.4 dB (Aux port input) to the measured levels to get the
true input levels.
If the DC12 Directional Coupler is
If the DC12 Directional Coupler is
installed
, add 20 dB (single input) or 21.0 dB
(Main port input) /32.8 dB (Aux port input) to the measured levels to get the
true input levels.
4 Are the input levels within the design limits?
If yes, proceed to step 5.
If no, or if no signals are present, find the problem before proceeding. You
cannot balance the GainStar Line Extender without proper input signals.
5 Remove the test probe from the forward input test point, leaving other
equipment connectors in place.
To Set Up the Reverse Output Level
Complete the following steps to test the reverse output level.
1 Connect the test equipment to the reverse output test point shown in the
1 Connect the test equipment to the reverse output test point shown in the
illustration below.
2 Measure the output level, and compare this level with the design level. The test
point attenuates output signals by 20 dB.
3 Is the measured output level within ± 0.5 dB of the design level?
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