Cisco Cisco 1 GHz GainMaker Amplifier Guía De Instalación

 

Balancing the Forward Path 

 

75 

 

 

If the output tilt is more than design tilt, replace the forward input EQ with a 
lower value. 

 

If the output tilt is less than design tilt, replace the forward input EQ with a 
higher value. 

3  Measure the output tilt again, and then return to step 1. 

 

After setting the tilt, complete the following steps to select the proper pad values for 
the line extender. The output level of the line extender is set by selecting the proper 
pad value. 
1  Connect the test probe to the forward main output test point. 
2  Measure the output level at the highest design frequency, and compare this level 

with the design level (on the design print). 

3  Is the measured output level within ±0.5 dB of the design level? 

 

If the output level is within ±0.5 dB of the design output level, proceed to 
step 5. 

 

If the output level is more than the design output level, replace the forward 
input pad with a higher value pad. 

 

If the output level is less than the design level, replace the forward 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). 

 

This section describes the procedure to follow when installing a trim network. 

 

A trim network allows you to adjust line extender frequency response to make it as 
uniform as possible across the entire output spectrum. The trim network can be 
adjusted within limits to cover a wide range of individual requirements. Type and 
use factor are determined by evaluating actual system frequency response. 

Refer to the frequency response plots in System Amplifier and Line Extender including 
GainMaker® Products Trim Networks Installation Instructions. 

 

Complete the following steps to install a trim network. 
1  Open the line extender housing. Refer to To Open the Line extender Housing (on 

page 15).