6402D persistence mode issue

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mchouinard
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Posts: 2
Joined: Mon Sep 21, 2015 3:48 pm

6402D persistence mode issue

Post by mchouinard »

Hi Sir, I am having an issue with the persistence viewing mode on my PicoScope 6402D.

Equipment PicoScope 6402D Serial CP472/012
USB Version 3.0
Calibration date : 10 Décember 2014
Hardware revision 11
Driver version 1.4.4.45
Firmware revision 1.0.2.0/1.1.37.0

I conducted a series of tests using a PicoScope software 6.10.18.1052 Window 7 64 bits ultimate edition and Linux Mint 7 PicoScope software 6.11.6.33 and a Rigol signal generator DG1022U applying a 1 MHZ signal, 1 Vpp, modulation AM 100% @ 1 Khz + using the external trigger output to the AuxIO of the PicoScope 6402D.

The results are surprising and unusable on my PicoCope 6402D, I have repeated these tests under the same lab setup using the older PicoScope 5204, 5203 and got very good results.

I have also noted that my 6402D is slow update in persistence mode and I tested all other persistence mode didn't work properly either. At this time I wander if there is a issue with my new 6402D PicoScope? or is there a software issue?

I have 16 snapshots but I could not upload them because of web service limitation.
6402D 1Mhz 1Vpp AM mod 100p  Persistance views.JPG
I took several snapshots to show my findings. I thank you for your support.

Regard Michel from Canada

alan
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Posts: 195
Joined: Thu May 25, 2006 8:02 am

Re: 6402D persistence mode issue

Post by alan »

Hi,

I think some of the issue is the timebase you are using 200uS/div x 10 divisions is 2 milliseconds across the screen.

If you have 2 milliseconds per screen then (by the laws of physics) you can not have more than 500 updates per second. Try changing to say 1us/div or faster and the number of waveforms per second should speed up.

mchouinard
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Posts: 2
Joined: Mon Sep 21, 2015 3:48 pm

Re: 6402D persistence mode issue

Post by mchouinard »

1 MHZ signal, 1 Vpp, modulation AM 100% @ 1 Khz to channel to channel A of PicoScope of 6402D and channel A of Picoscope 5204.

Output trigger from the DG1022U SyncOut to --> AuxIO of the PicoScope 6402D and the EXT Picoscope 5204.

Under simultaneous test condition the Picoscope 5204 much more responsive than the 6402D. The 6402D appear much slower waiting for data update. I have captured the display and found the capture rate on the 5204 to be over 210 while the 6402D was only 12.

I have previously tried the Linux, Windows PicoSoftware + the Beta version on different computer, USB 2 + 3, without any improvement.

I wander why my PicoScope 6402D is having a much slower Capture rate than the much older 5204 under exact test condition? I am having a firmware, software or hardware issue with my PicoScope 6402D?
I have included a snapshot.

Thank you for your help

Michel from Canada
-->
Hi Sir, I am having an issue with the persistence viewing mode on my PicoScope 6402D.

Equipment
PicoScope 6402D Serial CP472/012
USB Version 3.0
Calibration date : 10 Décember 2014
Hardware revision 11
Driver version 1.4.4.45
Firmware revision 1.0.2.0/1.1.37.0

PicoScope 5204 Serial YJL38/25
USB Version 2.0
Calibration date : 12 août 2009
Hardware revision 1
Driver version 1.5.5.15
Firmware revision n/a

Signal Generator Rigol signal generator DG1022U

Agilent 10073C 10:1 probe with BNC adaptor (2)

Software
PicoScope software 6.10.18.1052 Window 7 64 bits ultimate edition

Lab test setup

Output from the Rigol signal generator DG1022U CH 1 --> 1 MHZ signal, 1 Vpp, modulation AM 100% @ 1 Khz to channel to channel A of PicoScope of 6402D and channel A of Picoscope 5204.

Output trigger from the DG1022U SyncOut to --> AuxIO of the PicoScope 6402D and the EXT Picoscope 5204.

Under simultaneous test condition the Picoscope 5204 much more responsive than the 6402D. The 6402D appear much slower waiting for data update. I have captured the display and found the capture rate on the 5204 to be over 210 while the 6402D was only 12.

I have previously tried the Linux, Windows PicoSoftware + the Beta version on different computer, USB 2 + 3, without any improvement.

I wander why my PicoScope 6402D is having a much slower Capture rate than the much older 5204 under exact test condition? I am having a firmware, software or hardware issue with my PicoScope 6402D?
I have included a snapshot.

Thank you for your help

Michel from Canada
Attachments
Capture rate 5204  6402D 1Mhz 1Vpp AM mod 100p  Persistance views .JPG