Cisco Cisco 1 GHz GainStar Amplifier Installationsanleitung
Balancing the Forward Path
Balancing the Forward Path
Introduction
Be sure to use the correct procedure for forward path balancing. Refer to To Verify
the Forward Input Level for help in identifying the procedure that best fits your
system installation and Line Extender type.
The forward section of the GainStar Line Extender performs conversion,
The forward section of the GainStar Line Extender performs conversion,
amplification, equalization, and test point functions for the forward path signal.
To Verify the Forward Input Level
Complete the following steps to test the input signal level.
Important: You cannot balance the GainStar Line Extender without the proper input
Important: You cannot balance the GainStar Line Extender without the proper input
signals.
1 Connect the test equipment to the forward input test point shown in the
1 Connect the test equipment to the forward input test point shown in the
illustration below.
2 Measure the signal level at the following frequencies:
The lowest frequency specified in the system design
The highest frequency specified in the system design
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
If the input level is less than 8 dBmV, The CNR will deteriorate. You can replace
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