Rohde & Schwarz R&S SMU200A, Руководство по обслуживанию

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Troubleshooting R&S SMU200A
1007.9845.82 3.24 E-6
Normal action Error and error cause
It is recommended, to begin with checking the test
points on the DACIF board, since the diagnostic
converter is placed there.
definitely the DACIF board that is defective.
Note: Temperatures are not always output directly
in °C. The measured value often has to be
multiplied by 100.
The Debug Page displays a lot of information about internal parameters, which are supplied by the
instrument firmware to set the modules.
The Debug Page is protected under protection level 1. To unlock, use
SETUP
Protection... and key in
123456, quit with ENTER. Now the Debug Page can be called with:
SETUP
- R&S Debug -> Hardware Debug Page
Select the desired path under Path.
Select desired page under Select Debug Page.
Use
Update Debug Page to display the current settings.
This button must also be used to update the display when instrument settings such as level or
frequency are changed.
Among others, the currently used internal adjustment and calibration data are displayed as well
as internal levels.
Note: The displayed information represents internal generated data. Interpretation of the data
requires a sound knowledge of the functional correlation and the firmware in the instrument.
Refer to the hints given in following sections
Troubleshooting with Internal Adjustments
Various internal adjustments are indispensable for correct functioning of the instrument. The failure of a
certain adjustment can shorten troubleshooting considerably. The affected modules are the synthesis
module SSYN, the DACIF board and the output modules IQOP3 and IQOP6.
Note: Failed internal adjustments can also be queried on the info page -> History.
Normal action Error and error cause
Internal adjustments called:
SETUP
- Internal Adjustments…
Select the desired path under Path .
Note: When Adjust All is called, all internal
calibration operations are performed in
both channels. When troubleshooting,
however, it is advisable to start the
calibration operations individually and also
to monitor their progress.
Adjust Synthesis
SFU (step frequency unit), MLP (main loop), FRA
(fractional N-synthesis) and OPU (output unit) are
now calibrated in sequence.
Abort during adjustment:
See section
Troubleshooting - Module SSYN.