Tx digital data USB-6008

[iprados]

Hello, 

I'm transmitting digital bits with USB-6008 digital ports. I use all port 0, P0.0 to P0.7 and I'm interested in the output bit rate. I didn't find it in the datasheet, I only found the sample rate, but I don't know if there is a relantionship with digital output data speed. I want to know how to determine this bps. I hope your answers. Thank you. 

[Dennis_Knutson]

There is no sample rate/output rate in the datasheet for the digital I/O. As the specs and manual explain, digital I/O is strictly software timed so how fast you can write is dependent on your pc, os, programming language, etc. It is subject to a high degree of jitter. The stated max rate of an analog output is 150S/s so I would not be surprised if the digital output is about the same.  If you require anything other than static digital lines, you have the wrong device.

[iprados]

Thank you. The device is that I just need, I only needed the bit rate for to do a report. 

[JesusG]

Hi, iprados,

6008 digital lines are software timed. The update rate can only be as fast as your operating system timing source. If you are using Windows, the maximum software resolution is 1 millisecond, which means a 1 KHz frequency. On the other hand, this board has its own counter which is a a digital timed TTL line with its own hardware clock. In the future, if you need a device with a higher performance, I recommend you to purchase a new one.

Salu2.

Jesús.