Electronics > Repair
Advantest R3132 Spectrum Analyzer repair information
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Fraser:
There is already  thread discussing the repair of the Advantest R3131 spectrum analyzer and that also contains R3132 discussions.

I thought it might be useful to start a new thread for the R3132 model so that information on its repair may easily be found with searches.

I am uploading information that I have authored whilst repairing several of these analyzers in 2013. The information relates to the 2nd Local Oscillator as this drifts off tune with age. It is a very common fault that causes a self-calibration error.

I hope this information is of interest and help to others.

I am a member of the Yahoo Advantest Instruments Group and have uloaded these files to that Groups file area already.

Fraser
Fraser:
R3132 RF module block diagram
Fraser:
R3132 2nd Local Oscillator pseudo schematics (sketches really)

There are two versions of the 2nd Local Oscillator. The early version is slightly different and uses different supply voltages to those of the later version.

Fraser
Fraser:
The 2nd Local Oscillator alignment guide that I created from my experience with the later Type 2 RF modules. It must be modified when used on the early models as the supply voltage is incorrect for the early type 1 module. The alignment routine is somewhat unorthodox but I had five RF modules to repair and it was the most efficient way to align them. I had a known good RF module that provided the information I needed to produce these alignment process.

The file is a tiny bit over Dave's file size limit so I have had to compress it in a Zip file.

Fraser
Fraser:
After discussion on the Yahoo Advantest Instruments forum, I quickly wrote some comment on the earlier type of 2nd L.O and some thoughts on another alignment method that is more scientific. Here it is in all its rough glory  :)

Fraser
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