Operating instructions

4-2 Bench Testing
MB*/* Installation and Operation Manual
Test Equipment and Connections
The equipment typically used for testing the MB*/* consists of a network analyzer, such as the
HP 8711, 8712 or 8713 series, a model 1076 sweep comparator, and a model 1901C display or
equivalent. In addition, you need a 60/90 Vac bench power supply, a Motorola model SSP-PIN
power combiner, and a variety of jumper cables, adapters, and fittings.
Fabricate a cable simulator that you can configure to provide the desired cable loss in 1 dB
increments up to approximately 30 dB. Then, connect the test equipment as shown in
Figure 4-1:
Figure 4-1
Test equipment connections for bench sweeping
Network
analyzer
Sweep
comparator
Cable
simulator
Power
combiner
ac power
supply
Display
117
Vac
Sweep
input
Sweep
output
MB*/*
under test
60/90 Vac
IN 2
4
3
A SSEMBLED IN MEXICO
CAUTION!
To protect the network analyzer and sweep comparator, you must configure the SSP-PIN power combiner to block ac
power from the input port
.
To preserve signal quality, verify that all unused ports are terminated.
CAUTION!
Before you begin the following subsection, remove the input pad (
JXP-IN) before you apply power to avoid damage to
the hybrids.