Option 100 Fault Location and SRL 4-7
Making SRL Measurements
How to Make and Interpret SRL Measurements
Determine the Quality of the Test Lead Cable.
1. Leave the load connected to the end of the test lead cable and note the
level of the peak response on measurement channel 1 (the system
directivity).
2. Wiggle the test lead cable while observing the response on the
analyzer's display.
a. If the measurement trace is relatively stable, the test lead cable is
of good quality.
b. If you observe significant movement in the peaks of the
measurement trace when wiggling the cable (>10 dB), the test
lead cable may need to be replaced.
NOTE Variation in the system directivity that occurs as a result of test lead
cable movement degrades the quality and repeatability of SRL
measurements. Take precautions to protect your test lead cables from
mishandling or abuse. Do not step on or drive vehicles over test lead
cables.
Using the Default Calibration
To use the instrument default calibration, press .
(SRL must already be selected as the type of measurement.)
NOTE When the default cal is used, the “C” indicator does not appear on the
display.
CAL
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