HP OMNIBER 718 HP 37718A - Manual (Page 173)

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Selecting and Using "Other" Features
Running Self Test
Running Self Test
Description Before using the HP 37718A to make measurements, you can run Self
Test ALL TESTS to ascertain the integrity of the HP 37718A. These
tests take between at least 1 hour to complete depending on the options
fitted.
Alternatively you can run Confidence Tests which only takes 2 to 3
minutes to complete. This is not a full verification but performs BER
measurements with internal and external loopbacks fitted.
HOW TO: Run ALL TESTS
1 Choose TEST TYPE on the display.
2 Insert a formatted disk into the instrument disk drive.
3 Make the loopback connections listed below:
Connect Transmit module 75
Ω
OUT to Receive module 75
Ω
IN
Connect Transmit module 100/120
Ω
OUT to Receive module 100/
120
Ω
IN
Connect Transmit module 75
Ω
MUX to Receive module 75
Ω
DEMUX
Connect Transmit module 100/120
Ω
MUX to Receive module 100/
120
Ω
DEMUX
Connect Multirate Analyser IN to OUT
Connect Optical OUT to Optical IN via a 15 dB attenuator.
ALL TESTS OTHER SELF TEST