B E N C H T E S T I N G; Before You Begin; Test Equipment And Connections - Motorola BLE Series Installation And Operation Manual

S ec ti on 4

B e n c h T e s t i n g

Motorola's recommended procedure for placing a new BLE*/* into service is to fully test it on the
bench before it is field installed. There are specific alignment procedures that ensure proper
functioning of all components and simplify final installation. If the BLE*/* is properly aligned
on the bench only minor adjustments may be required in the field.
The following subsections provide instructions to bench align the BLE*/*.
B e f o r e Y o u B e g i n
The BLE*/* is shipped with a 20 ampere blade-type fuse for overcurrent protection. To avoid
applying 60/90 Vac to the test equipment during testing, remove the fuse illustrated in
Figure 2-9.
Open the housing and remove the chassis cover. Refer to your system drawings or records to
confirm the presence of the required options as described in Section 3, "Amplifier Setup,"
Forward Path.
T e s t E q u i p m e n t a n d C o n n e c t i o n s
The equipment typically used for testing the BLE*/* 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:
F i g u r e 4 - 1
T e s t e q u i p m e n t c o n n e c t i o n s f o r b e n c h s w e e p i n g
Network Sweep
analyzer comparator
117
Vac
To protect the network analyzer and sweep comparator, you must configure the SSP-PIN power
combiner to block ac power from the input port.
Cable Power
simulator combiner
60/90 Vac
AC power
Sweep
supply
input
BLE-*/*
under test
4 2 6
M
5 3
1
Sweep
output
B L E * / * I n s t a l l a t i o n a n d O p e r a t i o n M a n u a l
Display