How To Troubleshoot The Test Set - Agilent Technologies E8285A Manual

Troubleshooting

How to Troubleshoot the Test Set

How to Troubleshoot the Test Set
Document the result of each step in case you need to contact Agilent Technologies
for service assistance. General troubleshooting steps are illustrated in
page
NOTE Periodic Adjustment Interval
The calibration programs Periodic Calibration, IQ Calibration and IQ Demod Path
Calibration should be performed after the replacement of any assembly referred to
in
months. See
details.
On power-up, the Test Set runs the Self-Test Diagnostic. Most of the Test Set's
digital control functions are tested. The outcome of the test appears on the display
(if operating) and on four (DIAG) LEDs 0,1,2, 3, and 4 viewable digital controller
unit, see
the LEDs).
Figure 2-1 LEDs
Digital Controller Board
DIAG LEDs
0 1 2 3
J1
P2
46
S:\agilent\e8285\ALR\Book\chapters\trouble.fm
47.
table 5-1, "Assembly Calibration Information" on page
Chapter 5, "Periodic Adjustments/Calibration" on page 125
figure 2-1 (you must remove the external and top-internal covers to view
P1
controller5.eps
J4
CAL
MODULE
figure 2-2 on
127, or at least every 24
for
DS3 DS4
DS2 DS1