Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Guía De Instalación
Chapter 3 Balancing and Setup
3 Measure the output tilt again, and then return to step 1.
To Set the Output Level
After setting the tilt, complete the following steps to select the proper pad values for
the amplifier. The output level of the amplifier 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
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.
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 instead of before as in previous versions of system
amplifiers (II, II+, and III). 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
It is important to determine if the Aux output level specified on the design print
is the level before or after the signal director.
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 To Set Up Automatic Gain Control.
To Set Up Automatic Gain Control
This section provides procedures and tables for configuring and aligning the AGC in
the GainMaker node. 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:
Note:
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