Having trouble with the Labview driver for a TDS 794D oscilloscope

[bfrazer]

Hello all,

I'm hoping someone can help me fix a problem I'm having in getting a Tektronix TDS 794D oscilloscope running with Labview.

I'm using the tktds7x4_LV1 library downloaded from the NI instrument driver network.  The scope is connected via GPIB and sending single commands seems to work fine.

However I can't seem to run the tktds7x4 Getting started vi.  I get the following error.

Error -1074135024 occurred at tktds7x4 Configure Channel.vi

Possible reason(s):
Driver Status:  (Hex 0xBFFA0010) Invalid value for parameter or property.

Secondary Error: (Hex 0xBFFC0003) Parameter 3 out of range, or error occurred while setting Parameter 3.

Elaboration: Range

When I look at the block diagram for Configure Channel, the call library function icon has data type U32 for the instrument handle input.  On the other functions this seems to be a string type.  Is is possible there is a problem with the tktds7x4_ConfigureChannel function of tktds7x4.DLL?

All the previous functions including configure acquisition type seem to work fine.

Any help would be appreciated.

Brad

[gagi1]

Hi Brad,

The data type of the Instrument handle input should be U32. The same data type is used everywhere else in the driver for the instrument handle input. Have you tried changing the value of the range parameter to something different than the default? Also, you should check the probe attenuation - the value in the driver should match the value on the physical probe.