Cisco Cisco 1 GHz GainStar Node Installation Guide

3-4 

Balancing and Setup 

    4042027 Rev A 

Balancing the Forward Path, Continued 

 

1 

The Local injection RF input level recommended is 14 dBmV. Measure the 
signal level at the following frequencies: 

• 

The lowest frequency specified in the system design 

• 

The highest frequency specified in the system design 

• 

If the Forward Input Level is higher than 14 dBmV, you can adjust the 
Local injection input Pad 

• 

If the Forward Input Level is lower than 14 dBmV, you must adjust the 
Input level higher. 

2 

Measure the Forward input test point level, and compare this level with the 
design level. The test point attenuates input signals by 20 dB. 

3 

Are measured levels within the design limits? 
a)  If yes, proceed to step 4. 
b)  If no, or if no signals are present, find the problem before proceeding. 

You cannot balance the GainStar Node Forward Injection without the 
proper input signals. 

4 

Remove the test probe from the forward input test point, leaving other 
equipment connectors in place.