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ManualsBrandsAgilent Technologies ManualsMultimeter83624A
919293949596979899100
85108L System Manual
System Service and Troubleshooting
Network Analyzer Startup Problems
6-10
Network Analyzer Startup Problems
If the 85101C does not complete the power on sequence, turn its power off for 10 seconds and then
turn the power on. Note at what point in the power on sequence the procedure stops.
Power on sequence:
a.RLTS8421 LEDs all ON, then OFF
b.Same LEDs light to indicate the number of the self-test being run
c.Display shows: TESTING
d.Display shows: LOADING OPERATING SYSTEM
e.Disk drive is briefly active
f.Display shows: RECALLING INSTRUMENT STATE
g.Display shows: graticule and trace
If one or more self-tests fail, the network analyzer will show an “INTERNAL SELF TESTS HAVE
REPORTED A FAILURE” message. Refer to the “Self-Test Failure” section of the 8510C On-Site Service
Manual.
If the hang-up failure occurs anywhere in steps a, b, or c of the sequence, check the power supplies
(refer to the troubleshooting section of the 8510C On-Site Service Manual for a procedure). If the
power supplies are working properly, remove all instruments from the network analyzer system bus
and GPIB bus, and power on the network analyzer. If the network analyzer then completes the
power on sequence and display a graticule (disregarding any running error messages), one of the
other instruments or a GPIB cable is defective. If the network analyzer still does not complete its
power on sequence, refer to “Contacting Agilent” on page iv for service support.
Reloading the Operating System
If the failure occurs during steps d through g, the failure may be in the loaded operating system. Try
loading the operating system from disk using the following procedure:
1. Turn on the 85101C while holding down a key in the entry key area of the 85101. This will force
a self-test failure and bring up the error message display.
2. Press
=MARKER to bring up the self-test menu.
3. Insert the operating system disk into the drive.
4. Press
1 9 =MARKER and a disk directory will be shown.
5. Select the operating system file using the RPG knob, and then press LOAD FILE to load the
operating system from disk.