Cisco Cisco 1 GHz GainMaker Amplifier 설치 가이드
Chapter 3 Balancing and Setup
42
Preparing for Forward Path Balancing
Before you begin balancing, it is important to review and understand the following
information. This information will show you which balancing process is appropriate
for your line extender.
information. This information will show you which balancing process is appropriate
for your line extender.
Before balancing, make sure that you have configured the line extender according to
the specifications in your design print and that the line extender has warmed up for
approximately one hour.
the specifications in your design print and that the line extender has warmed up for
approximately one hour.
The table below shows the items needed for balancing.
You need a ...
To ...
copy of the design print
determine expected input and output signal
levels.
levels.
torque wrench with 1/2-inch socket
open and close the line extender housing.
spectrum analyzer or signal analysis
meter capable of working with
frequencies up to the highest design
frequency
meter capable of working with
frequencies up to the highest design
frequency
determine absolute and relative signal levels.
test point adapter or F-81
female-to-female adapter
female-to-female adapter
access the test points.
length of 75 ohm coaxial cable with
F-connectors on each end
F-connectors on each end
connect the test point adapter to the test
equipment.
equipment.
voltmeter
test the power supply AC and DC voltages.
reverse sweep receiver
test signals using a reverse sweep transmitter.
1/8-inch flat blade screwdriver
adjust switch S1, AGC Manual Backoff, and
AGC Gain Control
AGC Gain Control
Understanding BODE Switch Function
The BODE Switch is used to set the interstage control of the Line Extender. This
switch can be set for either Thermal control or Manual control of the Line Extender.
The BODE is always present in the Line Extender and can be engaged for either
Thermal or AGC operation of the product. The BODE circuit is by-passed when this
switch is in the Manual Mode.
switch can be set for either Thermal control or Manual control of the Line Extender.
The BODE is always present in the Line Extender and can be engaged for either
Thermal or AGC operation of the product. The BODE circuit is by-passed when this
switch is in the Manual Mode.
Understanding Switch S1 Functions
Switch S1 is a multifunction, three-position switch. Switch S1 functions are