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| Which Spectrum Analyzer Measures Very Low Frequencies? |
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| TinyMirrors:
I've been looking at spectrum analyzers, but the problem I'm having is finding equipment that measures in the range of 0.1 to 100khz. The interesting areas for me are between 0.1 and maybe 1-4khz. What device might give me better information for lower frequencies like this. The more modern equipment seem like it's looking at very high frequencies, so I'm stuck trying to find a list of old equipment that could do the job. Thanks! |
| tautech:
Welcome to the forum. Others are in a similar pickle as most stop at ~10 KHz. There's a recent thread that might give you some guidance: https://www.eevblog.com/forum/testgear/looking-for-a-dynamic-signal-analyzer-with-extended-bandwidth/ |
| innkeeper:
What your looking for is more likely a DSA. Dynamic Signal Analyzer I have an older unit, hp 3652a it is purpose-built for exactly that 64uHz -100khz range. happy hunting :) |
| w2aew:
--- Quote from: TinyMirrors on June 22, 2018, 09:26:36 pm ---I've been looking at spectrum analyzers, but the problem I'm having is finding equipment that measures in the range of 0.1 to 100khz. The interesting areas for me are between 0.1 and maybe 1-4khz. What device might give me better information for lower frequencies like this. The more modern equipment seem like it's looking at very high frequencies, so I'm stuck trying to find a list of old equipment that could do the job. Thanks! --- End quote --- Most spectrum analyzers are AC coupled and start at 9kHz or higher. There are exceptions that go down to a few Hz. Most are pricey though. The Tek RSA5100 series effectively goes below 1Hz, but again, pricey for the hobbyist. Another option is a Dynamic Signal Analyzer. Still a bit pricey, but this a better fit for your application. You might be better off using a digital scope with an FFT function. With such a low frequency requirement, you can take advantages of it's hi-res (in-situ boxcar averaging) mode if it has it, to gain some resolution and dynamic range. |
| innkeeper:
Tiny, could you tell us a bit more about what you are going to use it for? What kind of measurements you need, do you need tracking generation, will you be doing distortion analysis etc. |
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