Hi, I have the same device. And also another anlyser that is broken.
What often happens is that a @#$% hobbyist connects his sender directly tot the analyser to see the harmonics. So you come back from you holidays, and find your analyser... aaargh These analysers have ring-mixers at the input, 4 fast diodes, that can only handle 1 Watt or so. I do know that HP input modules are expensive. You could try to fix it yourself, but please note: the small wires you will see are actually coils in the gigaherz region, do not bend them! You need very fast diodes. My broken Polarad analyser uses for its 2 Ghz range a 4 GHz local oscillator. The diodes must be able to handle that without too many losses. Regards, Pieter Hoeben Date sent: Wed, 22 Dec 2004 07:05:19 -0800 To: Multiple recipients of list CHIPDIR-L <[email protected]> Send reply to: [email protected] Organization: Fat City Network Services, San Diego, California > Hi, > > today I got a HP 8559A spectrum analyser. Unfortunately the > input stage seems damaged (every thing works, but I do not see > any change in the display when I apply a signal - only noise). > It can display a range of 3GHz at once (and with mixing up to 21GHz). > What do you think? Are there any chances that I can repair > the input stage myself? I have not opened it yet, but I guess > there are some hard to get parts inside, and I do not have any > circuit diagrams. Anyone here with some experiences in this field? > > thx in advance, > > Matthias > -- > Author: Matthias Weingart > INET: [EMAIL PROTECTED] > > Fat City Hosting, San Diego, California -- http://www.fatcity.com > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB CHIPDIR-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). ______________________________________________ Hoeben Electronics Phone: +31 6 51590081 Ronkert 44 Fax: +31 13 5096025 5094 EW Lage Mierde Private: +31 13 5096200 The Netherlands E-mail: [EMAIL PROTECTED] http://www.hoeben.com ______________________________________________ -- Author: Pieter Hoeben INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
