just acquired a PSCGU250 last days and was testing functionalities: oscilloscope, generator, and so on.
Everything worked fine so far, except that oscilloscope is only recognizing the frequency of incoming signal (was using sinus from function generator) up to 4MHz (instead of the 12MHz announced…).
The signal trace in display seems ok, but waveform-parameters>frequency output start to go down (aliasing after 4MHz) or show unknown (???).
Tried different signal sources, amplitudes, output impedances, and just every now and then get a correct frequency value above 4MHz. Problem is specially visible if turn the knob to raise frequency slowly from 4MHz up.
Anyone has seen this problem? Hints?
Could eventually an update of driver help? (the CD version of driver is from 2008…)
The frequency response of the PCSGU250 should be very flat up to 12MHz.
Here a PCSGU250 spectrum analyzer plot up to 12MHz.
The signal source was PCGU1000 function generator in this test.
just acquired a PSCGU250 last days and was testing functionalities: oscilloscope, generator, and so on.
Everything worked fine so far, except that oscilloscope is only recognizing the frequency of incoming signal (was using sinus from function generator) up to 4MHz (instead of the 12MHz announced…).
The signal trace in display seems ok, but waveform-parameters>frequency output start to go down (aliasing after 4MHz) or show unknown (???).
Tried different signal sources, amplitudes, output impedances, and just every now and then get a correct frequency value above 4MHz. [/color]Problem is specially visible if turn the knob to raise frequency slowly from 4MHz up.
[color=#808080]Anyone has seen this problem? Hints?
Could eventually an update of driver help? (the CD version of driver is from 2008…)
thanks and cheers
Marina[/color][/quote]
Are you changing the timebase setting (decreasing the time/division) as you increase the frequency? If not you might be seeing an aliased signal. Try setting the generator to 12 mHz and clicking the Autoset button…
