5-2 Option 100 Fault Location and SRL
Making Simultaneous Fault Location and SRL Measurements
Fault location and SRL measurements can be made simultaneously and
viewed together by taking advantage of the analyzer's split display
feature. By making these two measurements simultaneously, both large
single faults (identified by fault location measurements) and small
periodic imperfections (identified by SRL measurements) can be viewed
at the same time, making the overall results easier to interpret.
Refer to Figure 5-1. The magnitude of the connector response (marker 1
in measurement channel 1) appears to be about −40 dB. A connector
response <−40 dB indicates that the connector being used for this
measurement is relatively good.
A connector response of >−40 dB indicates that the measurement could
be improved either by compensating for the connector with appropriate
connector model parameters or by replacing the connector.
Marker 2 on measurement channel 1 indicates an additional −40 dB
response at about 250 feet. Marker 3 indicates the load termination at
the end of the cable.
A true SRL spike can be observed at marker 1 on measurement
channel 2 at 995.025 MHz.
NOTE To view the close-in connector response, use the “Connector Fault”
feature which also uses the analyzer's split display. See “4. Determine
the Connector Model” on page 4-8.
NOTE The procedures and illustrations in this manual assume the use of an
Agilent Technologies 8712ET or 8714ET. If you are using an Agilent
Technologies 8712ES or 8714ES, some key presses and displays will be
slightly different.
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