Search found 8 matches

by kenneth
Thu Apr 11, 2013 7:01 pm
Forum: General Software Discussions
Topic: Streaming mode and trigger
Replies: 12
Views: 12437

Re: Streaming mode and trigger

In out script, the variable "Noutput" is set to 5000, and we collect that many samples. The script also returns the sample interval, from which we know the sample frequency (1/sample interval). We do an FFT of the time waveform, and the frequency vector for this FFt can then be set to (0:2499)*sampl...
by kenneth
Wed Apr 10, 2013 10:14 pm
Forum: General Software Discussions
Topic: Streaming mode and trigger
Replies: 12
Views: 12437

Re: Streaming mode and trigger

We used a 1 kHz signal in picoscope 6 in streaming mode (100 ms/div) and 1 microsecond sample interval, and were able to obtain the correct frequency based on the period. However, we noticed that 1 microsecond was the shortest sample interval, regardless of what we set for the number of samples in s...
by kenneth
Tue Apr 09, 2013 2:43 pm
Forum: General Software Discussions
Topic: Streaming mode and trigger
Replies: 12
Views: 12437

Re: Streaming mode and trigger

We are using an Agilent function generator (33250A) as the input. With the picoscope software, Picoscope 6, we confirmed that the signal was as we expected (540 kHz, 500 mVp). Now, in regards to the sampling issue, we accounted for the actual sampleinterval by having the function return sampleInterv...
by kenneth
Mon Apr 08, 2013 1:41 pm
Forum: General Software Discussions
Topic: Streaming mode and trigger
Replies: 12
Views: 12437

Re: Streaming mode and trigger

We have the 4227 model
by kenneth
Sun Apr 07, 2013 10:10 pm
Forum: General Software Discussions
Topic: Streaming mode and trigger
Replies: 12
Views: 12437

Re: Streaming mode and trigger

Martyn,

We have the latest SDK drivers (R6.6.57, I believe). As a third problem, we noticed, while going through the support forum, that the AWG and streaming mode could not be used concurrently. Was this problem addressed in the latest SDK?

Thanks
-Ken
by kenneth
Fri Apr 05, 2013 8:58 pm
Forum: General Software Discussions
Topic: Streaming mode and trigger
Replies: 12
Views: 12437

Re: Streaming mode and trigger

As a second problem, the sample interval returned by ps4000RunStream appears to be off by ~ 8ns. We asked for a 167 ns sample interval, ps4000RunStream returned 160 ns. We acquired a signal at 540 kHz, and with the return sample rate (160 ns), the measured frequency was 512 kHz. Any help would be gr...
by kenneth
Fri Apr 05, 2013 4:41 pm
Forum: General Software Discussions
Topic: Streaming mode and trigger
Replies: 12
Views: 12437

Streaming mode and trigger

We are having some difficulty determining when triggering occurs in streaming mode. We followed the template from the examples provided of the SDKs. The first trigger is apparent in the callback variable g_trig. However, successive triggers do not produce a TRUE value for g_trig. Our code is attache...
by kenneth
Thu Jan 24, 2013 12:25 am
Forum: General Software Discussions
Topic: Setting trigger type (single, repeat, etc.)
Replies: 1
Views: 1882

Setting trigger type (single, repeat, etc.)

I've got a 4227 that I've been pulling waveforms off of in Block mode. I would like to run the scope in like a single mode type triggering (my source is activated slightly before I start pulling waveforms) so I get the initial bits of data. Ideally, I'd like to set the scope in single mode, pull my ...