Error -200077 with NI9239 at DAQmxCfgAnlgEdgeStartTrig()

[Rudolf_Polzer]

I try to set up an analog trigger for the NI9239:

error = DAQmxCfgAnlgEdgeStartTrig(taskHandle, "/Dev1/pfi0", DAQmx_Val_Rising, 2.5);

the result is error = -200077 (Requested value is not a supported value for this property).

I have already tried different writings of the trigger channel name:

"Dev/pfi0"

"PFI0"

"APFI0"

"Dev1/ai0"

"/Dev1/ai0"

- all with the same result...

[Mike_B_NI]

Only the 9205 supports analog triggering.

[simpson67]

Hello, everyone.

I wanna get above red waves that is the Evnvelope wave of some input signals.

But I don't know what it can.

Now, I am using DAQ(NI USB-6259BNC ) and Labview 2010 evaluate ver.

Exactly I woder that getting above red envelope is possible.

some people said if I purchase toolkit or another instrument, implementation of ET(Envelope Tracking) technology will be possible.

And they said it will be possible using hillbert transform on labview. I don't know...

If you have any example using DAQ , plz upload for me. thanks.



Have a nice day.

[Rudolf_Polzer]

I also tried analog triggering with a NI USB-6210, same result.

BUT: for both devices, the list of supported properties

http://zone.ni.com/reference/en-XX/help/370471W-01/TOC40.htm

shows that analog triggering is supported. Also the M&A Explorer shows that analog triggering is supported.

Please help for the USB-6210, this is the device I want to use with analog triggering.

[Mike_B_NI]

The manual for USB-6210 says nothing about support Analog Start Triggers (http://www.ni.com/pdf/manuals/371931f.pdf). And I don't see anything about it on the page you referenced. 

[Rudolf_Polzer]

opening the page

http://zone.ni.com/reference/en-XX/help/370471W-01/TOC40.htm

and following the link

NI USB-6210 Supported Properties

shows the supported property

Analog Triggering Supported

But, reading again through the manual: you are right, it says "Analog Input Digital Triggering" - I overlooked the word Digital.

Thank you!

[Mike_B_NI]

That is a property you query to tell whether or not analog triggering is supported, not to say that it is. If you click on the link for the property, you'll see the description.

[Rudolf_Polzer]

If I click on the link, I get no information about whether this property is supported or not - I just see the description of the C function call of

DAQmxGetDevAnlgTrigSupported

which I didn't get working, possibly because of a missing header file.

This is still leading to misunderstandings, because triggering of an analog input is supported - but with a digital signal, which I don't have...

[Mike_B_NI]

"If I click on the link, I get no information about whether this property is supported or not - I just see the description of the C function call of DAQmxGetDevAnlgTrigSupported"

You're right, this property is one you query to find out whether or not the device can support this mode of operation.

"This is still leading to misunderstandings, because triggering of an analog input is supported"

Yes, analog triggering is supported, just with an external digital signal.

What are you trying to do, that requires an analog reference trigger?

Is it possible to do a continuous acquisition, monitor the data, and then stop the task so many samples after the event you are monitoring?

[Rudolf_Polzer]

I have two analog signals and I have to use one of them as a trigger. I will do this by software: record both signals and then cut out the appropriate part...