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Can't control signal generator in PS-4227

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Can't control signal generator in PS-4227

Postby jerry-Pico » Thu Mar 30, 2017 3:53 pm

I am practicing signal-generation with PS-4227:
* I connect AWG output to channel-A.
* Then I run demo "PS400 C-console" of PicoSDK.
* No matter how I choose "waveform/frequency" of the built-in functions, I always observed "sine" wave with 1kHz.

So, anybody know how to control the signal generation in PS-4227?
Thanks!
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Re: Can't control signal generator in PS-4227

Postby Martyn » Fri Mar 31, 2017 6:53 am

Are you using the code in the SDK without any changes ?

How are you viewing the outputted wave ?
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Re: Can't control signal generator in PS-4227

Postby jerry-Pico » Fri Mar 31, 2017 2:41 pm

No, I made no changes to the SDK demo.

Basically I use PS-4227 to generate waveform, and again use PS-4227 to see the results. As I mentioned:
* I connect AWG output to channel-A.

Anything wrong with my procedure?
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Re: Can't control signal generator in PS-4227

Postby Martyn » Fri Mar 31, 2017 6:14 pm

And what sequence do you use the menu options in ?

Please note that you can't change the generator whilst the scope is collecting, or waiting to collect, the data.

Try using PicoScope 6 to see how it works.
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Re: Can't control signal generator in PS-4227

Postby jerry-Pico » Fri Mar 31, 2017 7:00 pm

Yes, I was using PicoScope-6 to see the waveform:
* Configuration step:
--------- I just run the SDK demo, and choose waveform "triangle/gaussian/etc/" and difference frequency.
* Monitoring step:
--------- after configuration, I use PicoScope-6 to view the waveform
--------- Problem is: I always see the "sine" waveform with 1khz.

Anything wrong with my steps?
And what do you mean by "what sequence do you use the menu options in"?
Thanks!
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Re: Can't control signal generator in PS-4227

Postby Martyn » Fri Mar 31, 2017 7:08 pm

If you run the SDK C code to start the generator, then close the application, before running PicoScope 6 to see the data, that will be the problem. PicoScope will start with it's own settings which may have a 1kHz sine wave set.

If you don't close the C console before starting PicoScope 6, the the PicoScope 6 software will not be connected to the scope but will be running in demo mode, which by default displays a 1kHz wine wave on Channel A.

Go to Help->About in PicoScope 6 and post the text from the box, then we can see the reason.
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Re: Can't control signal generator in PS-4227

Postby jerry-Pico » Fri Mar 31, 2017 7:11 pm

OK, here is my sequence:
* G - Signal generator
* 2 - TRIANGLE
* 1000 (Hz)
* X - exit

Anything wrong with my menu option sequence?
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Re: Can't control signal generator in PS-4227

Postby jerry-Pico » Fri Mar 31, 2017 7:13 pm

Here is "About":

PicoScope® 6 - PC Oscilloscope software version: 6.11.12.1692
Copyright © 1995-2016, Pico Technology Ltd.

Model: PicoScope 4227
Serial Number: AP248/063
USB Version: 2.0
Calibration Date: Thursday, July 22, 2010
Hardware Version: 1
Driver Version: 1.2.6.4
Firmware Version: 1.0.5.0 / 0.5.10.0
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Re: Can't control signal generator in PS-4227

Postby Martyn » Fri Mar 31, 2017 7:20 pm

If you click on the SigGen icon in PicoScope 6 what does it show ? Sine wave at 1kHz ?

When you open a scope with PicoScope 6 it will write the code to run the device into it before restarting it. Any previous state will be lost.
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Re: Can't control signal generator in PS-4227

Postby jerry-Pico » Fri Mar 31, 2017 7:31 pm

SigGen icon? I can't find it, what does it look like?

"When you open a scope with PicoScope 6 it will write the code to run the device into it before restarting it"
--- write what code? when we open PicoScope-6, we just want to view( and not provide any code), right?
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Re: Can't control signal generator in PS-4227

Postby Martyn » Fri Mar 31, 2017 7:33 pm

The right of the tool bar, hover over the icons for a tool tip.
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Re: Can't control signal generator in PS-4227

Postby jerry-Pico » Fri Mar 31, 2017 7:37 pm

OK, I find it. Thanks a lot!

By the way, are we supposed to configure signal-generator inside the PicoScope-6?
Then what can we do with SDK (VC++ application)? Because it will lost after close the application, right?
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Re: Can't control signal generator in PS-4227

Postby Martyn » Fri Mar 31, 2017 7:42 pm

You can use the SDK to write your own application to do exactly what you want it to do.

PicoScope 6 is our application, that behaves in a similar way to a bench top scope, but has a few more bells and whistles.

Use either one or the other, whichever matches your needs best.
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Re: Can't control signal generator in PS-4227

Postby jerry-Pico » Fri Mar 31, 2017 7:47 pm

Got it:
* sophisticated applications may need to use SDK.
* but for my basic needs, SDK is not necessary, as PicoScope-6 is good enough.

Thanks again!
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