Eaton 2075a versus HP 8970a gain / noise analyser hint & kinks F5DQK January 2009 part 1/4

Eaton 275a and HP/ Agilent 8970a noise/gain analyser

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F5DQK January 2009 part 1/4

Eaton 275a and HP/ Agilent 8970a noise/gain analyser

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The 4 parts described - Part 1 : measurements without external mixer - Part 2 : measures from 2 to 26 GHz with external extensions - - - and « low-cost » ham solution - Part 3 : 1.8 – 26 GHz Eaton MT7552b extension analysis (reverse engineering) - Part 4 : 2 – 18 GHz Agilent / HP 8971b NF test-set extension (to be done)

Parts 1 - 2 - 3 are already on the site de F6KMX site at the following page: http://f8buu.free.fr/index.php?option=com_wrapper&Itemid=51

F5DQK January 2009 part 1/4

Eaton 275a and HP/ Agilent 8970a noise/gain analyser

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PART 1 MEASURES done WITHOUT OUTSIDE MIXER

F5DQK January 2009 part 1/4

Eaton 275a and HP/ Agilent 8970a noise/gain analyser

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Overview

- Before year 2004, all gain and noise measurements in the industry world were principally done with these 2 noise/gain analysers models - It is now more easy to find them on the refurbished marked. - This Powerpoint is illustrating hits and kinks about both Eaton 2075a and HP or Agilent 8970a analysers.

F5DQK January 2009 part 1/4

Eaton 275a and HP/ Agilent 8970a noise/gain analyser

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Abstract 1- Eaton 2075a memory backup repairing 2- Specs differences 3- Warm-up time effect and Nf precision measures 4- +28V noise source drive aspect 5- ENR source transformation down to 5 dB : 3 examples 6- Unknown noise source calibration 7- Cautions to take with Nf measurement accuraty with scale