Search found 10 matches

by MeridenJohn
Thu Jun 20, 2013 9:22 pm
Forum: PicoScope 6 for Windows
Topic: Picoscope instance freezes when multiple instances open
Replies: 1
Views: 1001

Picoscope instance freezes when multiple instances open

In my problem analysis I must view multiple waveforms repeatedly (making measurement, investigating details etc). It is most convenient to open 6 or so files at one time. Each file contains two channels of data totaling 100k samples (not very big) I find usually 1 or 2 instances of Picoscope freezes...
by MeridenJohn
Mon May 06, 2013 7:46 pm
Forum: USB PC Oscilloscopes
Topic: Math Channel (derivative)
Replies: 4
Views: 3229

Re: Math Channel (derivative)

+Hitesh, Thank you for the reply, however I'm not sure I understand your response. To calculate a derivative, I would normally calculate; delta voltage / delta time. It appears the math channel uses the delta time for one sample to the next. This however becomes very noisy so I would normally averag...
by MeridenJohn
Fri Apr 26, 2013 1:14 pm
Forum: USB PC Oscilloscopes
Topic: Math Channel (derivative)
Replies: 4
Views: 3229

Math Channel (derivative)

I would like to use the derivative operator to create a Math channel from measurement data. I've found the d/dx function calculates the derivative on a per sample basis. This makes result very "noisy". I tried the derivative of the average but could not get it to work. Is it possible to specify the ...
by MeridenJohn
Thu Feb 28, 2013 3:03 pm
Forum: USB PC Oscilloscopes
Topic: Ext Trigger Input, Safe Limits
Replies: 4
Views: 2030

Re: Ext Trigger Input, Safe Limits

Martyn

Thanks again for a fast response.

I will add a clipping circuit but now I won't worry about damage if we loose the clipping circuit ground.

Thanks

MeridenJohn
by MeridenJohn
Thu Feb 28, 2013 2:56 pm
Forum: USB PC Oscilloscopes
Topic: Ext Trigger Input, Safe Limits
Replies: 4
Views: 2030

Re: Ext Trigger Input, Safe Limits

Martyn, thanks for the fast response. I would ask for one bit of further clarification. Our application will work if triggering on a voltage below 5V. Say TTL levels. However the voltage will continue to rise to 16V or so before it stabilizes. Basically we are triggering on the edge of the power sup...
by MeridenJohn
Thu Feb 28, 2013 2:09 pm
Forum: USB PC Oscilloscopes
Topic: Ext Trigger Input, Safe Limits
Replies: 4
Views: 2030

Ext Trigger Input, Safe Limits

I was wondering how to safely interpret the External Trigger voltage specifications. The 3206B Ext Trigger Spec is +/- 5v (active) and +/-100 Volt overvoltage. Often "overvoltage" specifications suggest some limited occurance criteria. Is this the case with the 3206B? We are in a 0 to 20 Volt enviro...
by MeridenJohn
Wed Jan 09, 2013 11:30 pm
Forum: PicoScope 6 for Windows
Topic: Custom Probe on Channel D causes Lockup
Replies: 1
Views: 1334

Custom Probe on Channel D causes Lockup

I experienced a lockup when trying to select channel D as a trigger. I have a 6402B and am using Picoscope 6.6.50.3 My setup was: - Single trigger - 20 ms time base - Channels A, B and C are all voltage +/- 20 V , probes are internal X10 - Channel D is a custom probe, created when using a 3406B and ...
by MeridenJohn
Fri May 04, 2012 8:24 pm
Forum: PicoScope 6 for Windows
Topic: Picoscope V6.6.23RC crashes on probe setup
Replies: 1
Views: 1576

Picoscope V6.6.23RC crashes on probe setup

I can crash PicoScope repeatedly selecting a probe.... I am using V6.6.23 (RC) on Win XP (latest updates) on an older laptop. I have a custom probe in the library (nothing special, just a current transducer. If I follow the steps below I can case a fatal error repeatedly, every time: - Start Picosco...
by MeridenJohn
Fri Sep 09, 2011 9:36 pm
Forum: PicoScope 6 for Windows
Topic: Custom Probes (DC and AC operation)
Replies: 3
Views: 2153

Re: Custom Probes (DC and AC operation)

Ziko, Thank you for the prompt reply. Quite frankly I didn't necessarily expect a reply so there has been some delay in my response. 1) Custom Probe in AC mode: I am using a 3206B with PicoScope 6.5.78.5 Input is from a Pressure Sensor. The custom probe parameters are: m = 271.6 and c = 135.5 kPa. T...
by MeridenJohn
Mon Aug 15, 2011 8:34 pm
Forum: PicoScope 6 for Windows
Topic: Custom Probes (DC and AC operation)
Replies: 3
Views: 2153

Custom Probes (DC and AC operation)

Am using Picoscope V6.5.78 and I am very happy with it's function(s). 1) Custom Probe in AC mode: I have found a peculiarity when using a custom prove in both the DC and AC coupling (not at the same time of course). I find the offset is applied in both coupling modes. For me, the offset should be re...