HP 3582a spectrumnalyzer - diyAudio
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Old 7th October 2009, 02:31 PM   #1
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Default HP 3582a spectrumnalyzer

Hi,

I can get a working unit. What is a reasonable price???

Regs, Dirk
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Old 9th October 2009, 03:54 PM   #2
Hardi is offline Hardi  Germany
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Most of them still work, but also most of them have some minor problems with attenuators, switches and potentiometers.

I would say: A working unit for 250 to 300 Euro, and a real good one up to 400 Euro.

Remark: This unit is absolutely useless for (direct) audio measurements without a good notch filter because of the limited danymic range.

This one is useful:
uk.geocities.com/cyrilb2@btinternet.com/...5.../capsound2.pdf
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Old 10th October 2009, 08:13 AM   #3
Hardi is offline Hardi  Germany
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sorry!

http://uk.geocities.com/cyrilb2@btin.../capsound2.pdf.
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Old 10th October 2009, 07:30 PM   #4
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Hi Hardi,

thanks for your answer.

1. The unit (3582a) has a buitlt-in generator and offers only limited dynamics.
2. Your add-on filters the generator signal and allows to amplify frequency dependent the different distortion products?

Thanks, Dirk
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Old 11th October 2009, 09:55 AM   #5
Hardi is offline Hardi  Germany
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Quote:
1. The unit (3582a) has a buitlt-in generator and offers only limited dynamics.
It´s just a noise source (also "nur" ein Rauschgenerator).

Quote:
2. Your add-on filters the generator signal and allows to amplify frequency dependent the different distortion products?
The internal noise source is not usable for LF distortion measurement. I assume that you want to use the 3582 for audio measurement. The unit is good to measure many things like noise on DC voltages or phase measurements, but not for harmonic distortion in high quality audio device.

Therefore you need a very(!) good sine generator and a notch filter. A simple notch filter is mostly designed for a fixed frequency. (for example 1 KHz) It rejects the fundamental (1 KHz) while all the harmonics (and lower frequencies) can pass without attenuation. So the Dynamic rises.

You can also use the build in filter from a classic distortion bridge with "monitor output".
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Old 11th October 2009, 10:14 AM   #6
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Thanks Hardi, I got the point. I started reading your articles (link), I know now, that I have to built the high quality sine generator, and use additionally the notch filter to enhance dynamics of th HP... Will first read the arcticles, get an understandig and then ask further stupid questions... ;-)
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Old 11th October 2009, 01:38 PM   #7
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So, I read the articles 1/2 from Cyril Bateman. Fantastic piece of work. I now need to build the Sine generator and the notch filter. In another thread I read, that Mr. Bateman sold pcbs and a cd with a detailed description. But: On his (sometimes unavailable!) website I found no possibility to order pcb / parts.

How did you manage to build your own instrumentation??? Any source for pcbs / parts???

Thanks, Dirk

Last edited by HVfanatic; 11th October 2009 at 01:39 PM. Reason: spelling
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Old 11th October 2009, 07:15 PM   #8
Hardi is offline Hardi  Germany
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Quote:
How did you manage to build your own instrumentation??? Any source for pcbs / parts???
I never built one of these.
I still have a 3582A (and some other SA), but i do not measure distortion with it.
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Old 12th October 2009, 01:39 PM   #9
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Help!

So is there anybody around here that build the Cyril Bateman tools? Cyril, if you read this here, please contact me!!!

Regs, Dirk

P.S.: Cyrils mail adress is welcome to... ;-)
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Old 12th October 2009, 01:40 PM   #10
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@Hardi: How do you perform spectral distortion analysis? With a soundcard? What, if not this task, you use your 3582 for???
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