Tim,
I do not have choice. The prices to get a good working SA is outrageous for my limited budget. I have been very glad I can afford to buy a broken SA.
I only wish to restore at least one of the broken HP8565As first. Then, I wish to get the display digitized so that I can get rid of the CRT and that I can capture what has been measured and displayed on screen. No matter what I will invest, I believe will be a lot cheaper to get a working SA.
Thank you for giving the tips about EMC. Actually, I have bought that book very recently for my current job as an electronic design engineer at a R&D company.
I just measured the display dimensions. It is a 5" display. Should be easy to find a replacement, provided that I will need to design the circuits behind the LCD module first.
There sure to be problems when I start working with this project. I am not denying the fact that there are always problems for some project no one has ever attempted or done. But I will not be getting anywhere if I only talk about my plans and worry about all of the possible problems but do nothing about them. Setting a high goal may not guarantee success but will land me at a higher ground than where I currently am.
I do not have much expectation about the performance of this HP 8565A because it is already old and has been beaten up.
Currently, I just need some tools for me to work on some RF projects at home. If I have to get accurate results, I will then bring my projects to test with those modern test SAs at my company. So, accuracy or stabilization may not so important for me.
Amos
________________________________
From: mai1grp8s <mai1grp8s@...>
To: hp_agilent_equipment@...
Sent: Saturday, August 27, 2011 12:01 AM
Subject: Re: [hp_agilent_equipment] Which HP spectrum analzyer is structurally most similar to that of HP 8565A?
?
Yep - might have to read up on the EMC - have a google for Henry Ott.
Be careful you don't over invest in the SA. They are good but the YTO
drift will still be there. If your tube is really suffed you can always
use the signals on the back for your CRO or pc sound card. A good pro
stereo sound card with 24bit digitising would do a good job. Software
required.
One thin that could be worth investigating is auto stabiliser circuit.
It locks to the 2000th harmonics of a 1MHz VCXO - changing this could be
intresting.
Yes those lcd panels are too expensive - cheaper than a new 8566b. They
hook into the video display and read the vectors into a raster. The
8565a is a fully analog SA with a bit if digital to control sweep and
display parameters.
Tim
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