Problem with ag86100A driver Set_channel_scale parameter

[Henning]

Hello,

I have Labview6.1 here and want to use the Agilent 86100A CVI instument driver.

It is possible to read the channel scale of the oscilloscope channels (default:10mV=0.01). But when I try to set the scale, I get an error message:

ag86100a Set Channel Scale.viDriver Status: (Hex 0xBFFC0003) Parameter 3 is invalid.

I can only think of the following two reasons:
1)The ag86100A.dll contains an errors, or
2)Passing the parameters from the VI 86100A Set Channel Scale.vi to the Function Ag86100A_SetChannelScale
does not work properly. The input is an double precision floating point number like requested.

any help is appreciated

[Randy Solomonson]

Hello-

Be sure that the instrument and driver actually support the range being used. This information is probably listed in the instrument manual. What values work with that function? Is parameter 3 what is expected? Be sure the datatype matches what is expected. If all else fails, try writing this question to the instrument.driver@ni.com address.

Randy Solomonson
Application Engineer
National Instruments