Tektronix 3 Series MDO - Part 2: Rotor Reflectometer Calibration

RE: Tektronix 3 Series MDO - Part 2: Rotor Reflectometer Calibration

three-phase — Sun, 19 Jan 2020 11:48:18 GMT

Found out what I had done to turn the screenshots into a white background.

There is an 'ink saver' option on the save screen that I must have caught with one of my clumsy fingers and enabled. When ticked, the screenshot has a white background.

[View:/resized-image/__size/620x349/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-b2362496-c415-4225-9e6a-b44f8297f2f4/0383.contentimage_5F00_205830.png:620:349]

When unticked, the black background is present again.

[View:/resized-image/__size/620x349/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-b2362496-c415-4225-9e6a-b44f8297f2f4/7230.contentimage_5F00_205831.png:620:349]

RE: Tektronix 3 Series MDO - Part 2: Rotor Reflectometer Calibration

DAB — Sat, 18 Jan 2020 19:41:06 GMT

Very good update.

Well explained.

DAB

RE: Tektronix 3 Series MDO - Part 2: Rotor Reflectometer Calibration

three-phase — Sat, 18 Jan 2020 18:05:15 GMT

I have added an update today to this blog to include the tests carried out on site on a generator rotor in preservation, and the 3 Series MDO with the rotor reflectometer.

Kind regards

RE: Tektronix 3 Series MDO - Part 2: Rotor Reflectometer Calibration

genebren — Fri, 20 Dec 2019 18:05:04 GMT

Great update in your series on the Tektronix 3 series MDO. Interesting subject, reflectometry. Back in the 70's I did a lot of work on antenna systems, and the reflectometer was a super quick and easy way to troubleshoot. We had several antenna array system, with up to 16 elements, along with 100's of RF switches and trying to find the faulty element/switch/cable/connector was relatively easy. We would attach the reflectometer to each of the antenna leads in turn and look for unexpected impeadance changes (open/short/leakage/etc.). We could also manually control the various RF switches and verify proper impedances. We would typically have multiple failures after an intense electrical storm, causing bad readings or outright failures. We would then travel out to the faulty towers and work out the issues.