Agilent Technologies 85025A, User'S And Service Manual

Page: 35 / 98

T able 4-1. Recommended Equipment (continued)
Description Recommended Model
Equipment required for 85025E Detectors
RF plug-in 83595C
P ower sensor 8485A
Directional bridge 85027B
Calibrated open/short p/n 85037-60001
Attenuator 8493C Option 010
Return Loss P erformance T est
This performance test uses an 8757C/D/E scalar network analyzer system to
measure the return loss of the detector .
85025A/B/D/E Return Loss P erformance T est Procedure
Specications
Specications apply at a temperature range of 25 C 65 C. F or the detector's
return loss specications , refer to T ables 1-2 through 1-6.
Description
The return loss of the 85025A/B/D/E can be measured using the test system
described in this procedure . The test setup is calibrated using an open/short to
minimize frequency response and phasing errors . The detector under test is
then connected to the TEST PORT of the bridge , and its return loss is measured
on the analyzer .
The return loss should be greater than the limits listed in T ables 1-2 through
1-6. There is a certain amount of measurement uncertainty in any scalar
network analyzer system. The return loss uncertainty for each detector is given
in T ables 4-2 through 4-4. Conformance to specication cannot be assured
unless the return loss of the detector is equal to the specied return loss
plus the measurement uncertainty . F ailure to meet specication cannot be
proven unless measured return loss equals the specied return loss minus the
measurement uncertainty . The measurement uncertainty is based on the worst
case specications for the test devices in the measurement.
Agilent 85025A/B/D/E P erformance T ests 4-3