HP 37718A Installation And Verification Manual page 46

N OTE
N OTE
Performance Tests
Self Test
If the Optical Interface is a Dual Wavelength Option the 1550 nm IN and
OUT ports are not connected at this stage and can be tested later.
If any or all of these connections are not made the HP 37718A/19A will
FAIL Self Test.
2 Make the loopback connections listed below:
Connect the 15 dB optical attenuator provided at the Optical OUT and
then connect the attenuator output to Optical IN using the optical
cable supplied with your instrument.
Connect Multirate Analyser IN to OUT
Connect Transmit module 75
Connect Transmit module 100/120
Ω
120 IN
3 Press
RUN/STOP
will be displayed.
The information pertaining to TEST TYPE, TEST NUMBER and
SUBTEST NUMBER will change as the Self Test progresses.
If the HP 37718A/19A is functioning correctly, after a time of 2 to 3
minutes, TEST STATUS PASSED is displayed.
If TEST STATUS [FAIL nnn] is displayed, check the displayed error
information and check loopback connections are correct. Repeat the
test and if the problem persists contact your local HP representative.
See Chapter 5 for information.
Each individual self test requires unique loopback connections. To obtain
a list of the connections required move the highlighted cursor to
CABLING INFO and press
display. Also refer to Chapter 5 for Self Test connection information.
3-6
Ω
OUT to Receive module 75
Ω
OUT to Receive module 100/
to activate the Self Test. TEST STATUS RUNNING
.
The Loopbacks list will appear on the
SET
Ω
IN