PicoScope 7 Software
Available on Windows, Mac and Linux
Bad SNR
Bad SNR
Hello...
I have a new 2204A and I'm getting strange readings when I first test it. The sine curve is "angular", "edgy" and not smooth and in the FFT I measured a high background noise directly at the generator output. Am I doing something wrong or is the device defective?
I have a new 2204A and I'm getting strange readings when I first test it. The sine curve is "angular", "edgy" and not smooth and in the FFT I measured a high background noise directly at the generator output. Am I doing something wrong or is the device defective?
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Re: Bad SNR
That looks normal, the 2204a is an 8 bit scope so there would be 256 levels across a given voltage range, you are currently set to +/-10V and are looking at a +/-1V signal and there are around 25 discrete levels in your signal.
Try setting the voltage range to +/-1V and set the signal generator to 900mV and you will see a better signal. Additionally go into the Scope menu via the button at the top and then select the sampling tab and increase the Target Number of Samples
Try setting the voltage range to +/-1V and set the signal generator to 900mV and you will see a better signal. Additionally go into the Scope menu via the button at the top and then select the sampling tab and increase the Target Number of Samples
Martyn
Technical Support Manager
Technical Support Manager