Cisco Cisco 1 GHz GainMaker Amplifier Guía De Instalación
Balancing the Forward Path
Note: On the Low Gain Dual and 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 is
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
Balancing the Reverse Path (on page 72).
Forward Path Balancing for Thermal Stations Using Amplifier and Coax
Compensation Mode
Before you begin, make sure that you have configured the amplifier module
according to the specifications in the design print, and that the amplifier has warmed
up for approximately one hour.
Note: If it is necessary to balance a thermal station using amplifier and coax
Note: If it is necessary to balance a thermal station using amplifier and coax
compensation mode immediately after module installation (with little or no warm-up
period), the output level should be set 1 dB lower than specified by the design print.
This reduction in output level will be offset by an increase in internal amplifier gain
as the thermal circuit in the amplifier warms up.
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