does NI GPIB usb controller have functionality of controlling all common lab devices,

[Sadabat]

which NI hardware is better , and does GPIB support real time programming, plase could you help me i am totally new to LABVIEW.

And cant we use GPIB for parallel controlling at he same time, because it states in the users manuel about Controller in Charge (CIC).

Please if you can show me a way i go ahead and understand i will be so pleased with best regards !..

[Christian Mergl]

Only PCI and PXI GPIB devices have realtime support. USB and realtime doesn't like each other very much.

If you have more then one device you can do parallal communication, otherwise you have always one master (CiC).

However I would suggest to contact your local NI Office to figure out the best configuration for your application

Regards,

Christian

[Dennis_Knutson]

There are numerous GPIB tutorials available and I would recomend you do a search for them.

By design, GPIB is essentially sequential. In normal circumstances, you would send a command to instrument A, then a command to instrument B. You would first read instrument X, and then do a read of instrument Y. The data lines are a parallel interface to the addressed instrument but that is not the same thing as communicating in parallel to mulitple instruments.

[MattBradley]

The controller in charge only refers to the control source -- usually, a PC.  So you have one PC controlling a bunch of instruments.

Some instruments can act as controllers (and some have to, but those are usually older or special purpose instruments).  So you can give up and take control -- but that's a more advanced topic than most people ever need.