Search found 12 matches

by jane
Thu May 10, 2012 9:48 am
Forum: USB PC Oscilloscopes
Topic: Re: Pico 3206B - Timebase Accuracy
Replies: 2
Views: 3464

Re: Pico 3206B - Timebase Accuracy

Martyn wrote: ±50 ppm or, to make it easier, ±0.005% would mean 20ps on an individual sample interval of 4ns
Hm.
4ns = 4000ps
0.005% = 0.005/100

±0.005% out of 4000ps = 4000ps x 0.005/100 = ±0.2ps ?
by jane
Mon Apr 02, 2012 2:51 pm
Forum: PicoScope 6 for Windows
Topic: The AWG issue of PicoScope5204 on PicoScope R6.6.18
Replies: 9
Views: 4109

Re: The AWG issue of PicoScope5204 on PicoScope R6.6.18

Another AWG issue. One issue with the AWG, Picoscope 6.6.23 and 4262 is ringing. AWG-sq-ring.gif It looks like the AWG pushes the bandwidth limit of the DAC/filter. For the 4262 hardware any other waveforms than sine are more or less useless, either the bandwidth/slew rate is very limited or there a...
by jane
Fri Mar 30, 2012 1:17 pm
Forum: PicoScope 6 for Windows
Topic: Log sweep mode
Replies: 13
Views: 9436

Re: Log sweep mode

Gustav wrote:3) No of steps.
Or no of steps/decade..
As working with audio equipment I support your suggestion very much. 8)

JanE.
by jane
Fri Mar 30, 2012 12:04 pm
Forum: PicoScope 6 for Windows
Topic: White Noise / PRBS bugs?
Replies: 3
Views: 1956

Re: White Noise / PRBS bugs?

Another minor/cosmetic bug is that White Noise is reported with a frequency in the properties panel.
wn-prop.gif
by jane
Thu Mar 29, 2012 5:17 pm
Forum: PicoScope 6 for Windows
Topic: White Noise / PRBS bugs?
Replies: 3
Views: 1956

White Noise / PRBS bugs?

I can't get any signal from the internal generator in position White Noise and PRBS except when offset <> 0 V.

See animation (signal generator connected to Ch A):
white-n02.gif
PicoScope® 6 - PC Oscilloscope software version: 6.6.23.2
Model: PicoScope 4262
by jane
Tue Mar 27, 2012 6:43 pm
Forum: PicoScope 6 for Windows
Topic: Error reading peak signal values
Replies: 1
Views: 1476

Error reading peak signal values

When I apply 142mV (100mV rms) from the internal signal generator to Ch A I do measure: Amplitude at peak: -20.69 dBV Average amplitude at peak: 74.2mV Why do I read 74.2mV and not 92.4mV that is equal to -20.69 dBV? And why not 100mV or 142mV (peak value)? According to the Picoscope 6 users guide (...
by jane
Sun Mar 25, 2012 8:00 am
Forum: PicoScope 6 for Windows
Topic: Error reading THD+N
Replies: 9
Views: 3132

Error reading THD+N

Here is a test of THD, THD+N and S/N measurements. For this DUT 3HD is dominant at ~51dB below the fundamental that corresponds with the THD measurement. But the THD+N reading has to be wrong: -96dB is the same as measured S/N -- where has the THD portion of the THD+N gone? THD+N.gif PicoScope® 6 - ...
by jane
Sat Mar 24, 2012 5:03 pm
Forum: USB PC Oscilloscopes
Topic: Rise time measurements
Replies: 3
Views: 2447

Rise time measurements

I'm doing rise time measurements using an external generator. Square wave is 2kHz, 10Vpp. 80/20% measurement tells me 400ns but 90/10% says 153us (!) Adding cursors to the graph indicates 680ns for the 90/10%. Why is the 90/10% measurement so far out? PicoScope® 6 - PC Oscilloscope software version:...
by jane
Fri Mar 09, 2012 8:46 am
Forum: PicoScope 6 for Windows
Topic: Phase shift measurement
Replies: 25
Views: 7014

Re: Phase shift measurement

One word: Brilliant! :D
I ran a quick test connecting probe A/B before/after a filter and the phase shift read-outs matched the filter's transfer function very well.

Thank you!

BR,
JanE
by jane
Thu Mar 08, 2012 4:55 pm
Forum: PicoScope 6 for Windows
Topic: Phase shift measurement
Replies: 25
Views: 7014

Phase shift measurement

To find the phase shift between two signals (Ch A and B) I: a) Add a cycle time measurement to Ch A (or B). b) Use cursors to measure the time delay between signal A and B. c) Calculate the phase shift from the information above. Is it possible to implement a measurement into PicoScope 6 that calcul...
by jane
Mon Mar 05, 2012 7:43 pm
Forum: Pre-Sales Advice
Topic: Bode Plot with PicoScope ?
Replies: 24
Views: 26358

Re: Bode Plot with PicoScope ?

If the problem is related to the time stamping of the generated signal (to calculate phase) it could maybe be possible to sample the generated signal by lets say channel A while reading the DUT by channel B?

Not a perfect solution but that doesn't require changes within the scopes..
by jane
Sun Mar 04, 2012 1:07 pm
Forum: Pre-Sales Advice
Topic: Bode Plot with PicoScope ?
Replies: 24
Views: 26358

Re: Bode Plot with PicoScope ?

Any progress regarding the Bode plots?
It should have been very easy to implement this feature into the Pico-software: Sweep the signal generator from frequency x to frequency y, and sample the amplitude and phase of the signal..

JanE