I have 3 Tektronix scopes hanging off a PC via GPIB. 2 of the scopes are TDS 220 and the third is a TDS 224 (4 channel version of the 220). I am using the NI instrument drivers available. I can read both channels of data from the 220s and channels 1 and 2 from the 224, but I can't seem to read channels 3 and 4.
The NI instrument driver is labelled as covering the 224 (on the NI web site), however once it's loaded all the VIs are labelled as 2X0, none are labelled as 2X4. This gets me wondering as to whether they are set up to only read channels 1 and 2.
Any suggestions? Thanks.
