6509 port bit setting

[Quentin AL]

Hello

I had the problem with the DAQPAD-6507 not to be able to set many bits at the same time, even with the "DIO write port" VI.

You can see below what I don't want to have: a delay of 3ms between the bits 0 and 1.

I would like to know if this has been changed with the 6509.

[ReginaW]

Hello,

I know my reply is late but hopefully not too late.

The 6509 does not have any counter on board and the measurement is software timed. Therefore the digital outputs or inputs

are done via software timing which means you have got some jitter.

This jitter depends on the operatins system, the programming language and the way you are programming your device.

on the following link you can see a benchmark of the 6509:

http://digital.ni.com/public.nsf/websearch/BB40B4C31944ED52862570B3000BB144?OpenDocument

this probably helps you to estimate to what extend you can synchronize the digital outputs/inputs.

But they will never be as accurate as they would be with hardware timed output or input.

I hope this helps

Best Regards

Regina

National Instruments