The 497P is specified for coverage between 100 Hz and 7.1 GHz, but
because this late-model unit shares its hardware platform with the top-
of-the-line 494AP, I was able to calibrate it for the 494AP's full 21
GHz range. It is basically a 494AP without an OCXO standard and
external-mixer jack.

This analyzer is in unusually-clean shape, and includes a cover and set
of manuals. It would be a good economical alternative to a 494AP for
any RF/microwave experimenters who can live without the waveguide mixer
option.

http://cgi.ebay.com/ws/ebayISAPI.dll...tem=3822660862

As an aside, this unit has the latest 49x ROMs I've run across (version
9.7 from 1992). The EPROMs were socketed, so I took the liberty of
reading them to .BIN files. If anyone needs them to repair their
analyzer, drop me an email and I'll send the images to you. These ROMs
can support any 49x analyzer of similar vintage, including the 494AP,
492AP, 492BP, 492PGM, 495P, and the 2753-2756 line. (They probably
would NOT work in older instruments such as the original 492/494/496
analyzers.)

-- jm

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