How to Invert waveform from AFG3101 function generator interfaced using GPIB

[Sail]

Hello,

I wanted an inverted pulse which can be generated using AFG3101 function generator. But the instrument drivers provided does not have an option INVERT anywhere. So when i went thru the discussion forum, I found solution to write GPIB command "POL:INV". I tried doing this but it flashed an error saying "Unrecognized command". Can anyone please help me in doing this? I want pulse going down from 2.5Vpp to 0 when triggerred.

Thanks

Sailesh

[NathanT]

Hello Sailesh,
       I recommend that you take a look at the instrument drivers that we have available for the AFG3101 and see if the inversion function is implemented in them.  Let us know how if goes.

Cheers,

NathanT

[Sail]

Hello Nathan,

I have downloaded the instrument drivers. But they have not implemented "Inversion" in their VIs. So if i want that feature on labview i need the visa string which does that operation. SO it will be very helpful if you can get me the VISA string.

Thanks,

Sailesh

[Dennis_Knutson]

You might try sending the correct command. The syntax from the manual is:

OUTPut[1|2]:POLarity{NORMal|INVerted}

You are just sending POL:INV not, for example OUTP1:POL INV

stupid smilies  - correct syntax is OUTP1(colon)POL INV

Message Edited by Dennis Knutson on 08-13-2007 07:50 AM

[Sail]

Thanks Dennis.

Regards,

Sailesh