Electronics > Projects, Designs, and Technical Stuff
Homebrew spectrum analyser high-impedance probe
BravoV:
Poor Man's 500 MHz Active FET Probe -> http://welecw2000a.sourceforge.net/docs/Hardware/Aktiver_Tastkopf_mit_OPA659.pdf
Its written in German though, but with lots of photos especially tons of results of the probe's profiles from the spectrum analyzer, it should be easy to interpret the probe's performance.
philpem:
Should probably update this...
I eventually did build one of the probes -- the Elektor original. The EAGLE CAD files are here: https://bitbucket.org/philpem/rf_probe
Enjoy.
Alex Eisenhut:
My favorite is the P6032.
http://w140.com/tekwiki/wiki/P6032
Or you can look into this
http://w140.com/tekwiki/wiki/282
philpem:
Interesting!
Apparently my spectrum analyser (Advantest R3361A) has a Lemo probe-power socket which matches the pinout of the Tek 492 and 492P connector. The matching probe is apparently the P6201. Sadly they're pretty thin on the ground in working condition; the majority I've seen for sale are either overpriced, broken or in some far-flung locale being sold by someone who'd rather not sell internationally.
I'm sure there's a later replacement for the P6201 but I'm not enough of a Tek guru to know what that would be. And I'll bet there's a HP/Agilent/Keysight equivalent too.
Conrad Hoffman:
There's a high speed probe on page 96 of this Jim Williams LT app note- http://cds.linear.com/docs/en/application-note/an47fa.pdf
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version