Test and Measurement Forum

Repeatable bug.
Running latest version of PicoScope 6 (see below).
Selected Demo Device
Select Demo Signals
Select A source control
Adjust Amplitude (Peak) to 3.6V
Add measurement to waveform AC RMS
EDIT:Enable 16 bit enhancement
RMS value is not 2.5V RMS?

OS Name Microsoft(R) Windows(R) Server 2003 Enterprise x64 Edition
Version 5.2.3790 Service Pack 2 Build 3790
OS Manufacturer Microsoft Corporation
System Type x64-based PC
Processor EM64T Family 6 Model 15 Stepping 2 GenuineIntel ~2000 Mhz
Processor EM64T Family 6 Model 15 Stepping 2 GenuineIntel ~2000 Mhz
Locale Australia
Hardware Abstraction Layer Version = "5.2.3790.3959 (srv03_sp2_rtm.070216-1710)"


PicoScope® 6 - PC Oscilloscope software version: 6.3.43.0
Copyright 1995-2009, Pico Technology Ltd

Model: PicoScope 4224
Serial Number: DEMO
Driver Version: 1, 0, 3, 0

Hi,
By my calculations, PicoScope6 is correct. 2.5 volts RMS x 1.414 (for a sine wave) gives 3.535 volts peak. Setting 3.535 volts peak in the signal generator gives 2.5 volts RMS as a measurement.
Regards,
PeterF.

I figured it out.

Enabling Enhancement (from 12 bit to 16bit sampling) causes and amplitude error in the DEMO waveform.

so it is a bug, but probably only affect the Demo waveform and not real thing devices, I'll know when I get my 4224 unit on friday.