Cisco Cisco 1 GHz GainMaker Amplifier Guía De Instalación

 

 

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Note: On the High Gain Dual, the type of plug-in signal director installed directly 
affects the signal level measured at the Aux RF output test points. This is because 
the Aux RF output test points are located after the signal director in the forward RF 
signal path. The test points now reflect the actual output of the port. 
It is important to determine if the Aux output level specified on the design print is 
the level before or after the signal director. 

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If it is the level after the signal director (port output level), the test point 
should match the print design level. 

 

If it is the level before the signal director, the test point level should be “x” dB 
lower than the print design level, where “x” is the insertion loss of the signal 
director feeding the particular Aux port being balanced. 

5  Proceed to the next section, To Set Up Automatic Gain Control. 

 

This section provides procedures and tables for configuring and aligning the AGC in 
the 1.2 GHz GainMaker System Amplifier. AGC attenuator values are required to 
select the proper AGC attenuator value based upon actual AGC pilot carrier output 
level. See To Select the AGC Pad Value. 

Note: 

 

Output levels are measured at the pilot frequency. 

 

The standard single-pilot AGC makes amplifier output adjustments based on the 
level of the pilot frequency carrier. Activate the pilot carrier with its final 
unscrambled video source before beginning balance and alignment.