8-22 Option 100 Fault Location and SRL
Key Reference
Alphabetical Key Reference
CAUTION There is some uncertainty built into the measurement when multi-peak
mode is enabled since the analyzer cannot always distinguish between
real responses and response sidelobes which look like responses. To
distinguish between side lobes and responses, various window selections
should be tried (see ), while looking for changes in the
responses.
Softkey in fault cal menu. Allows entry of new multi-peak threshold.
The analyzer can automatically compensate for multiple responses
along the cable. For example, consider a cable with three successive
faults along its length with reflection coefficients of 0.8. Without
multi-peak correction, the measured response would be:
Peak Measured
Response
Calculation
Peak #1 0.8
Peak #2 0.16 (0.8 * (1 − 0.8))
Peak #3 0.032 (0.8 * ((1 − 0.8) − 0.16))
With multi-peak correction, the measured response becomes:
Peak Measured Response
Peak #1 0.8
Peak #2 0.8
Peak #3 0.8
Each subsequent peak is corrected based on the magnitude of the
previous n peaks. Peak values are searched for above a user-defined
threshold.
Access Keys:
or
(You must already be in fault
location measurement mode to access the multi peak
menu via the key.)
BEGIN
CAL
CAL
CAL
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