Modulation Analysis of 1000kS/s?

I am trying to view an O-QPSK signal at 1000kS/s. In Modulation Analysis mode I get what looks like random noise. I assume the 150kS/s limit is as high as you can go in Modulation Analysis mode and therefore my signal appears to be noise? Is there any way to view the constellation of my signal with my SA124A?

Hi Mike,

The SA44 and SA124 only have an analysis bandwidth of 250kHz which limits you to symbol rates of ~150kS/s or less (most signals). Our software sets the device bandwidth to 2*samplerate when looking at a signal. This does limit you to certain signals for the SA44/SA124. Our BB60C spectrum analyzer has an analysis bandwidth of 27MHz, and is much better suited for wideband signal measurements.

I hope this helps.

Regards,
A.J.

Thanks AJ. I’ll save my pennies for the BB60C…:)

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