I am trying to acquire waveforms in two channels via GPIB from a Tek 2440 scope-I am successful in acquiring a single waveform(from CH-1).But when I activate both the channels I am not reading in anything.I am wondering if I have to make any changes in the VI/scope for this.Any suggestions are welcome.I have attached my VI too.
I would suggest trying the driver available Tektronix 2440 LabVIEW Certified Plug and Play Instrument Driver. I don't see anything in your VI about Channel 1 or Channel 2 at all. I would also suggest getting rid of the sequence structure and just use data flow (wire up the error in/out) to control the execution.