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Return Loss at a
Nominal 10 dBm
Description
4-2 Performance Tests
he return loss of the 85037 can be measured using the test system
described in this procedure. he test setup is calibrated using an
open/short to minimize frequency response and phasing errors. hen
the detector under test (DU ) is connected to the
bridge, and its return loss is measured on the 8757D.
he three main sources of error in these measurements come from:
1. bridge directivity
2. source match of the bridge
3. dynamic accuracy of the 8757D
he rst two vary with frequency while dynamic accuracy varies
with the measured return loss amplitude. Use the corresponding,
connector-compatible Agilent directional bridge, Agilent 85027/A/B
or C.
Figure 4-1. Return Loss etup
of the
test port
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