324 Chapter6
General Troubleshooting
System Analyzer Programming Errors (100 to 150)
599 LOG GAIN Fidelity gain error from DC logger calibration.
System Errors (600 to 651)
ADC timeout errors occur if the A2 controller assembly
frequency counter is faulty. Refer to Chapter 7,
"ADC/Interface Section."
600 SYSTEM Hardware/firmware interaction; check other errors.
601 SYSTEM Hardware/firmware interaction; check other errors.
650 OUTOF RG ADC input is outside of the ADC range.
651 NO IRQ Microprocessor is not receiving interrupt from ADC.
Digital and Checksum Errors (700 to 799)
EEROM Checksum Errors (700 to 704)
Faults on the A2 controller assembly can cause these
errors. Refer to Chapter 9, "Controller Section."
Although some of these errors might result in a
blanked display, it is possible to read these errors over
HP-IB. Refer to "Troubleshooting to a Functional
Section" in this chapter.
The EEROM on A2 is used to store data for frequency
response correction, elapsed time, focus, and intensity
levels. Error codes from 700 to 703 indicate that some
part of the data in EEROM is invalid. An EEROM error
could result from either a defective EEROM or an
improper sequence of storing data in EEROM. Check
the EEROM with the following steps:
1. Place the WR PROT/WR ENA jumper on the A2
controller assembly in the WR ENA position.
2. On the spectrum analyzer, press
CAL, MORE 1 OF 2,
SERVICE CAL DATA, FLATNESS, and FLATNESS DATA.
Enter a value of 130. Press
PREV MENU, STORE
DATA, YES, and DISPLAY.
3. Press
INTEN, enter an intensity value of 90, and
press
STORE INTEN.
4. Press
MORE 1 OF 2, FOCUS, enter a focus value of
128, and press
STORE
FOCUS. Press LINE to turn the spectrum analyzer off,
then on, cycling the power.
5. If errors are still present, the EEROM A2U501 is
defective. Refer to the EEROM replacement
procedure in Chapter 3.
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