Cisco Cisco 1 GHz GainStar Node Installation Guide
Balancing and Setup
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The RF input level recommended range is 8 dBmV to 12 dBmV. If the input level
is higher than 12 dBmV, The CSO, CTB will deteriorate. You can replace the
forward input pad with a higher value pad.
If the input level is less than 8 dBmV, The CNR will deteriorate. You can replace
the forward input pad with a higher value pad.
is higher than 12 dBmV, The CSO, CTB will deteriorate. You can replace the
forward input pad with a higher value pad.
If the input level is less than 8 dBmV, The CNR will deteriorate. You can replace
the forward input pad with a higher value pad.
3 Measure the forward input test point level, and compare this level with the
design level. The test point attenuates input signals by 20 dB.
4 Are measured levels within the design limits?
a If yes, proceed to step 5.
b If no, or if no signals are present, find the problem before proceeding. You
b If no, or if no signals are present, find the problem before proceeding. You
cannot balance the GainStar Line Extender without the proper input signals.
5 Remove the test probe from the forward input test point, leaving other
equipment connectors in place.
To Determine the Output Tilt
Complete the following steps to determine the output tilt of the GainStar Line
Extender.
1 Connect the test point probe to the forward output test point.
Extender.
1 Connect the test point probe to the forward output test point.
2 Consult the design print to find the proper output tilt.
3 Measure the output signal levels at the frequencies you used in To Verify the
3 Measure the output signal levels at the frequencies you used in To Verify the
Forward Input Level.