HP 4395A - Page 57

9. INPUT IMPEDANCE TEST (NA)
Description
This test uses a network analyzer and a T/R test set to measure the return losses of the
HP 4395A R, A, and B inputs. One-port full calibration is performed to measured the return
loss accurately.
The HP 4395A has no capability for making an A/B measurement. The HP 4395A can
measure the return loss of the B (or A) input using A/R (or B/R) measurement capability of
the HP 4395A. However, it cannot measure the R input's return loss. Therefore, a network
analyzer is used in this test.
Specication
Return Loss (@att.=10 dB)
Return Loss
Frequency @att.=10 dB
100 kHz  freq.  100 MHz  25 dB
100 MHz < freq.  15 dB
Test Equipment
Network Analyzer :::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :
HP 8753C/D
T/R Test Sets :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: ::
HP 85044A
50 Type-N Calibration Kit :::: :::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: ::::
HP 85032B
1
APC7.5-N(f) adapter ::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::
HP 11524A or part of HP 85032B
Type-N Cable, 61 cm (four required) :::: ::::: :::: ::::: :::: :::
HP 11500B or part of HP 11851B
1: This calibration kit includes several terminations and adapters
. This test requires the OPEN(f),
SHORT(f), LOAD(f) in the calibration kit HP 85032B .
Procedure
1. Connect the test equipment as shown in Figure 2-11. Don't connect anything to the end of
the test port cable.
Performance Tests 2-25