Operating instructions

3-2 Amplifier Setup
To successfully setup the MBV3-100*, you need to perform the following tasks:
 Forward path alignment
 Return path alignment
 Check powering and surge protection options
Forward Path Alignment
You must perform the following MBV3-100* alignment procedures for proper performance in
the forward path:
 Select the appropriate cable equalizer or cable simulator
 Select the appropriate input, midstage, and output 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 MBV3-100*s in the forward or return path
 RF input level for the MBV3-100* 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-100-* 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 MBV3-
100*.
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 remove or install the electronics chassis cover while the MBV3-100* is powered.
 If you need to remove or install the electronics chassis cover for any reason, shut off
the AC power first. Verify that all chassis cover screws are tightened to 10–12 in-lbs.
 Do not use wire jumpers to bypass the SFE-100-* location.
 Recognize that actual pad and SFE-100-* 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.
 Secure the electronics chassis in the housing base and torque to 18-22 in-lbs. to facilitate
heat transfer and avoid damage from overheating.
 Perform a bench alignment. Pre-aligning the MBV3-100* response on the bench (Section 4,
“Bench Testing”) for a system signature simplifies field alignment.
MBV3-100* Installation and Operation Manual