Amplifier Setup; Forward Path Alignment; Before You Begin - Motorola STARLINE SERIES Installation And Operation Manual

Section 3

Amplifier Setup

This section provides instructions for fully configuring the MB*/* and describes the proper
forward and return path alignment procedures. The following tasks need to be performed for
successful amplifier setup:

Forward path alignment:

Selecting the appropriate cable equalizer or cable simulator
Selecting the appropriate input, midstage, and output pads
Selecting the appropriate output passives
Verify proper flatness control
Verify proper level control
Check return path alignment
Check powering and surge protection options
It is recommended that you read this entire section before you install the MB*/*.
Forward Path Alignment
The following subsections describe the MB*/* alignment procedures required for proper
performance in the forward path.

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 MB*/*s in the forward or return path
RF input level for the MB*/* 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
(JXP IN) before you install or remove the electronics chassis or apply power to the MB*/*.
Leave the JXP IN pad location open if a high value pad is not available. A more accurate
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.
MB*/* Installation and Operation Manual