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Amplitudes in Spectrum mode - 6.6.46.1

Forum for discussing PicoScope version 6 (non-automotive version)

Amplitudes in Spectrum mode - 6.6.46.1

Postby wk_emc » Mon Sep 10, 2012 3:13 pm

Hello,

There seems to be a difference in amplitudes between scope and spectrum mode.

=> use demo mode with signal source 1V sinus 1MHz, offset 0V

Amplitude measured in scope-mode 1V peak - as expected

Switching to spectrum mode: Amplitude at peak: 653.8mV
All the other available logarithmic units (dBV, dBm@600Ohm, dBm@50Ohm) in spectrum mode are derived from this
lower value.

653.8mV seems close to Ueff=UPeak/SQR(2) which would lead to 0.707V
Is it a bug, or are the peak values intentionally not available in spectrum mode?

Regards
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Re: Amplitudes in Spectrum mode - 6.6.46.1

Postby Martyn » Tue Sep 18, 2012 12:31 pm

It is intentionally like that
Martyn
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