Troubleshooting Using Diagnostic Test; Power On Self Test; Pll Unlock; Contents Of The Diagnostic Test - Agilent Technologies ENA Series Service Manual

Troubleshooting

Troubleshooting Using Diagnostic Test

Troubleshooting Using Diagnostic Test
The Agilent E5061A/E5062A has an diagnostic test function to diagnose the analog
measurement section and internal dc power supply voltages. The diagnostic test makes it
possible to isolate a faulty board assembly. The following paragraphs describe the
procedure to perform the diagnostic test.

Power On Self Test

Power-on self-test always takes place once the E5061A/E5062A is turned on. When a
failure is detected, a message "Power on self test failed" is displayed. The content of the
power-on self-test is the same as a part of the diagnostic test program and includes the dc
power supply voltage, source PLL synthesizer and level controller (ALC) tests. When the
self-test failed, perform the diagnostic test to break down into the individual tests and
narrow down failure possibilities.
NOTE
The following procedure can be used to restart the power-on self test as required.
a. Press
b. Click
c. Click
d. The test result (OK or Failed) is displayed in the

PLL unlock

When a PLL of the frequency synthesizers is unlocked, not the "Power on self test failed"
but "Phase lock loop unlocked" message is displayed. If it occurs, A1 Source board may be
faulty.

Contents of the diagnostic test

The diagnostic test contains 10 test groups shown in Table 4-1. Each test group can be
performed independently and verifies one of various operating characteristics of the analog
measurement section.
Table 4-1
100
key.
Service Menu and, then, Test Menu
Power On Test to restart the test. Wait until the power-on test ends.
Diagnostic test group menu
1 A1 Board DC-BUS Test
2 A2 Board DC-BUS Test
3 A1 Board Internal Level Monitor Test
4 A2 Board Internal Level Monitor Test
5 Source Power Accuracy (Step Attenuator) Test
6 Source Power linearity (Power sweep) Test
7 Receiver Absolute Gain Test
in the softkeys.
Power On Test key.
Chapter 4