Products > Test Equipment

Please recommend a scope (or other device) purely for audio testing.

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David Hess:
I have never used them but Syscomp Design makes some instruments which may suit your needs.

http://www.syscompdesign.com/Instruments_ep_42.html

nctnico:
Another option would be to look for a network analyser. Say something which goes from several Hz to several MHz. These aren't cheap (although good deals can be found) but do save a lot of trouble. A network analyser is also useful for various other tasks like an LCR meter. I just wanted to mention this for completeness if it hasn't been mentioned already.

Someone:

--- Quote from: egonotto on June 12, 2017, 07:23:40 pm ---Hello,

uktony wrote:

--- Quote from: uktony on June 12, 2017, 02:56:42 pm ---So what would I like:

* FFT / bode plotting
* Downloadable data
* Linux compatibility would be nice (to enable scripted testing)
* An onboard DDS generator
* USB connectivity *or* a method to store data (if not a USB scope)
--- End quote ---
When I understand correct the tsunami is essential a DDS-generator.
The input has only 15KS/s.
--- End quote ---
The tsunami board has an input with phase/frequency measurement and a peak detector to estimate amplitude. So its a very basic network analyser with a broadband peak detector that will overestimate amplitude, limit the dynamic range, and hide non-linear effects.

ruairi:

--- Quote from: nctnico on June 12, 2017, 10:56:47 pm ---Another option would be to look for a network analyser. Say something which goes from several Hz to several MHz. These aren't cheap (although good deals can be found) but do save a lot of trouble. A network analyser is also useful for various other tasks like an LCR meter. I just wanted to mention this for completeness if it hasn't been mentioned already.

--- End quote ---

The 50 ohm inputs / low max input levels on most network analyzers complicate matters, very few pieces on audio gear will be happy with those conditions.

Keicar:

--- Quote from: f5r5e5d on June 12, 2017, 07:32:03 pm ---for amplifier circuits for audio, whether op amp or discrete, stability verification requires 10s of MHz viewing BW at the least

--- End quote ---

Absolutely - no need for fancy analysis features at such bandwidth, but you do need a way to see oscillation and ringing at such frequencies - an audio amplifier that's behaving like an RF oscillator will draw excessive current and sound nasty, but detailed analysis at audio frequencies won't reveal the cause of the problem.

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