Teardown, Repair & Analysis of an Agilent 4.5GHz E5071C ENA Vector Network Analyzer

In this episode Shahriar repairs an Agilent E5071C ENA Vector Network Analyzer generously loaned by AllTest. Please visit their website for all your measurement, calibration and service needs:

sales@alltest.net
https://alltestchambers.net
https://alltest.net

The network analyzer is missing the main HDD which initially prevents it from being tested. An image from a donor E5701C instrument is used to boot the unit and gain access to the instrument firmware. The unit shows an inaccurate S11 with an open Port 1 while S22 shows a perfect reflection. This indicates a potential problem with the Port 1 T/R module. Teardown of the module reveals catastrophic damage to the resistive front-end coupler which has been mostly likely caused by a large RF input power incident. After cleaning the PCB area, a replacement coupler is constructed. The repaired unit is checked for full self-test and used to measure a YIG tuneable filter.

You can may check the Andostar microscope lineup here. (Direct Link / Not-tracked)

More information about Wheatstone Bridge can be found here.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

  • Social Media

    twittergooglepluswordpressyoutuberedditrssemail
  • Administrator

  • Archives

This site is protected by Comment SPAM Wiper.