ETS-Lindgren 95252-1 Bulk Current Injection Probes (Archived) - Manual (Page 15)

BULK CURRENT INJECTION PROBES Insertion Loss
© ETS-Lindgren, L.P. – February 2005 11
Rev C – PN 399263
PROCEDURE
1. Connect the signal generator output directly to the RF
voltmeter input as show in Figure 3, indicated by the dashed
line, using the same cables which connected the calibration jig
and the injection probe under test. Tune to the test frequency
and adjust the signal level for a reference of 0 dBm indication
on the RF voltmeter.
2. Without changing control settings, connect the signal generator
output to the bulk current injection probe input and connect the
calibration jig connector to the RF voltmeter input.
3. Note the RF voltmeter output in dB. The difference between
this reading and 0 dB is the insertion loss. In this
measurement, the loss can not be less than 3 dB since half the
injected power is absorbed by the 50 Ohm termination that is
particularly loading (50%) the Calibration Jig.
Figure 3—Typical Reference Calibration Setup
50
Termination Probe
Calibration Jig
Signal
Generator
50
RF
Voltmeter
50
Archived 6/1/10