Motorola BLE100 - Manual (Page 37)

4-2 Bench Testing
BLE100 Installation and Operation Manual
Test Equipment and Connections
The equipment typically used for testing the BLE100 consists of a network analyzer such as the
HP 8712 or 8713 series, a 60/90 Vac bench power supply, a cable simulator, a Motorola model
SSP-PIN power combiner, and a variety of jumper cables, adapters, and fittings.
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.
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
AS SE MBLE D IN M E X I C O
4 2 6
3 1 5
Network
analyzer
BLE100
under test
Cable
simulator
Power
combiner
117
Vac
AC power
supply
60/90 Vac
Sweep
input
Sweep
output
CAUTION!
Before you begin the following subsection, remove the input pad, JXP - IN , to avoid damage to the hybrids before you
apply power.
Measuring Forward Gain
This subsection provides instructions for measuring the full gain and the operational gain and
flatness of the BLE100.
To measure the full gain of the amplifier:
1 Determine whether the power-supply jumper (J1) is positioned for LO or HI operation.
2 Connect the BLE100 to the test equipment as illustrated in Figure 4-1 and apply power.
3 Verify that the dc voltage is 24 V
± 0.4 V and re-install the input pad.
4 Apply the sweep signal and adjust test equipment as needed.
5 Select manual gain by placing the drive control select jumper in the MAN position and turn
the MANUAL LEVEL control (Figure 2-8) fully clockwise.