Products > Test Equipment
OWON XSA1032-TG 3.2G Spectrum Analyzer
nenea dani:
How does it handle immediately after 9kHz? Did you see the signal generated by TG? Does it have sufficient amplitude and the correct shape in 9Khz -50Khz? How is the sensitivity in this range?
TomC:
I wonder if you are thinking audio work?
I attached some spectrums that include the range you are thinking about, but as you can see the noise floor is quite uneven in that region. Probably means response is going to be uneven too. All I had handy right now was the 50 ohm terminator, but I'll experiment with a low frequency generator later on, maybe one of my ARBs, and post some spectrums.
On the last attachment I had the Start Frequency set to 9kHz before I turned on the amplifier, but if you look at the labels you can see that it automatically jumped to 99.95kHz. There for a second I thought I had found a way to flatten the noise floor, but it looks like they limited the frequency range you can use with the amplifier turned on.
From the little bit I've been able to research so far, I think that I read that SAs that start in the kHz range are AC coupled, which probably wouldn't be too good for audio.
I did look at the TG output a while back, but don't remember all the details. On this SA you have to set Span to 0 to use it as a generator. From what I recall it's a sine wave, and I was looking at about 0dBm with one of my DSOs that goes to 200MHz. I'll hook that up again and post some DSO screens and some FFT screens later on.
mawyatt:
What you are likely seeing at these lower frequencies is the phase noise of the SA sweeping oscillator which has a 1/f^n characteristic. The better the oscillator 1/f PN the better noise floor in this low frequency region.
BTW great buy for the OP, ~$600 :-+
Best,
nenea dani:
I'm really looking to find a way to use a 9Khz analyzer in the audio field. My Siglent SSA3021X tool has a weak signal between 9Khz and 50Khz, and in addition it is not really sinusoidal. I would somehow go with the normalization function. Now I'm experimenting with lowering the frequency with the help of an H-mixer. I take the spectrum between 20Hz and 100Khz to 1Mhz, obviously only with a very clean external sine signal.
mawyatt:
The PicoScope 4262 might be worthwhile to look into.
Best,
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