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Section 3
Amplifier Setup
This section provides instructions for fully configuring the SLE*-* and describes the proper
forward and return path alignment procedures. It is recommended that you read this entire
section before you install the SLE*-*.
To successfully set up the SLE*-* you need to perform the following tasks:
!
Align forward path
!
Align return path
!
Check powering and surge protection options
Forward Path Alignment
You must perform the following SLE*-* alignment procedures for proper performance in the
forward path:
!
Select the appropriate cable equalizer or cable simulator
!
Select the appropriate input and midstage pads
!
Verify proper flatness control
!
Verify proper level control
Before You Begin
Before you begin to set up the amplifier and perform forward path alignment, please read the
following instructions and recommendations.
For proper forward alignment obtain:
!
RF output levels and tilts of all SLE*-*s in the forward or return path
!
RF input level for the SLE*-* being set up (from system design or as-built map)
!
A carrier at the system's highest frequency. It can be modulated or continuous wave (CW)
and should be inserted in the headend at standard video levels. This carrier is used to
simplify field set-up.
It is recommended that you:
!
Install the system design value SFE-*-* and a high value (20 dB or above) input pad (
before you install or apply power to the SLE*-*.
Leave the
pad location open if a high value pad is not available. A more accurate
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forward input test point reading is achieved with a high value pad installed.
!
Do not use wire jumpers to bypass the SFE-*-* location.
!
Recognize that actual pad and SFE-*-* values may differ slightly from their design values.
This is caused by factors such as walkout errors, worst-case data utilization during design,
and temperature variation from 70°F.
!
Perform a bench alignment. Pre-aligning the SLE*-* response on the bench (Section 4,
"Bench Testing") for a system signature simplifies field alignment.
PRELIMINARY - Motorola Internal Use Only
SLE*-* Installation and Operation Manual
)
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