TDS 744A Instrument Driver_Probleme

[leo_83]

Hallo,

Reference:  TDS 744A Instrument Drivers

1) I can create Limit test setup , store the template (For Eg: REF1), but before starting the Limit Test ON/OFF, i am interested to see both the waveforms, i mean , if i am comparing Channel 1 to my Template(Ref1), I want to see both of them(overlapped) available on scope..

Using scope this can be done by selecting

Shift--> Acquire Menu-->Create Test Template-->Press Math button and You see below all options. You choose simply REF1 and then both the waveforms appear on scope, Channel 1 gets deselected, but if you again press channel 1, you see Channel 1 waveform and the Template created overlapping.

How can this be done using Instrument Drivers available on NI website? I mean by which VI is the function for MATH REF Switch Implemented? I couldnt find it,please help.

2) I also do no see implementation of Waveform Switch VI, by which i would be able to switch ON/OFF the channels i desire

Any help reply will be greatly appreciated..

Thank you..

Abhi

[jjp377]

Hello,

Have you tried tktds 7xx Conf. LmTst.vi or Define Math.vi [includes INV(REF)] not sure if that is what you are looking for.

[leo_83]

Ok,  tktds 7xx Conf. LmTst.vi  =  I select the first one, COMPARE CHANNEL 1 TO REF 1 ..The comparision starts on , but what you see on scope Display is just Waveform of Channel 1, [Please see Figure 1 attached ] whereas I wish to see Channel 1(Waveform) masked by REF1(This is the mask I have created using CREATE TEST LIMIT TEMPLATE ), [please see Figure 2 attached]

tktds 7xx Conf. LmTst.vi  , i believe doesnt help ,This VI does not help to switch ON/OFF the mask(in our case REF1) created..

Define Math.VI  VIdoesnt help either..

Now, Is there any VI, which would help to get the waveform as well as REF1(Mask) displayed together, manually it can be done[ please see Thread1 of this post], so that what you see on Scope is Figure 2..

-x-

Also, Every Scope has an ability to Switch ON/OFF the channels, Is there any VI, to perform this operation?

If there are doubts,please reply and i will make it more clear, but we need to find a solution to this task..

Thanks and please reply..

Abhi

P.S.: Figures attached are simply examples , to explain wht is Limit Testing function..

[Dennis_Knutson]

It is rare to find a driver that includes 100% of all of the possible remote control options. The nice thing about all of the drivers that NI writes is that they provide the source code for them. If you know the commands you want to execute, you can create another function for the driver and add it or modify an existing one. You could also simply do a VISA Write of the necessary commands. If you do modfiy the driver, submit the changes to http://sine.ni.com/apps/utf8/niid_web_display.sub_driver and then others can benefit.

[NathanT]

Hello Abhi,
       When developing a driver for an instrument, the developer focuses on features that can be used remotely.  It sounds like the feature(s) that you are concerned about implementing are isolated to the scope's display.  Many users that are using a scope remotely acquire the data from the scope and then do analysis and presentation of the data on their PC.  Your valuable time might be better spent developing the data analysis and presentation aspects of your application.  Wouldn't you rather see the data on a larger screen?
       Just like Dennis said, the great thing about Plug and Play drivers is that you have the power to customize the driver to suit your own special needs.  Let us know how it goes.

Cheers,

NathanT

[leo_83]

Hi,

The information helped, i have implemented a VI which can be used to switch ON/OFF the waveforms..Thank you.

w.r.t. attachment , this is the problem i am facing since 2-3 days, tried whatever i knew, but nothing is working, please guide.What makes me thing about it is once i Restart my Scope all VIs work fine,  when Settings are changed in one of the VIs, the desired operation fails..

However i am able to serve my purpose with VIs shown in attachement below under Solutions , but i wish to know what does this Error mean and signifies,how do i overcome this?

Cheers,

Abhi

[leo_83]

Hi,

The information helped, i have implemented a VI which can be used to switch ON/OFF the waveforms..Thank you.

w.r.t. attachment , this is the problem i am facing since 2-3 days, tried whatever i knew, but nothing is working, please guide.What makes me thing about it is once i Restart my Scope all VIs work fine,  when Settings are changed in one of the VIs, the desired operation fails..

However i am able to serve my purpose with VIs shown in attachement below under Solutions , but i wish to know what does this Error mean and signifies,how do i overcome this?

Cheers,

Abhi

[Dennis_Knutson]

There is no attachment and I don't know what you mean by 'below under Solutions'. If you did a preview post, your attachment gets lost and you have to re-attach.

[leo_83]

please see the post just above your reply, there exist attachment.  In first post, i had some problem during attachment.

[Dennis_Knutson]

A rough hand drawn sketch of something is not much to go on. I have no idea what that drawing is supposed to be. Actual code would help.

The timeout error means that the SRQ was never generated by the instrument.