How can we configure the reading cycles of the serial port ?

[NCHU]

Hi all,

Refer to my previous post "Continuous read and save date in a specified time with serial port" now my problem becomes how can I configure the reading cycles of the VISA Read ?

My sensor device has a sampling cycles is 100 usec (10kHz) (a measurement data has 7bytes, ex:+1.125CR+3.165... CR is inserted between measurement), however the transfering cycle of the device to PC via serial port is 5 msec/character (bytes). Then the transfering cycle of a measuremet is 35 msec (sampling rate 28.6Hz).

I tried to change different baud rates but have no change for the sampling rate of the record data. It looks like serial port is not a good choice for applications requiring high sampling rate. Or is there any other hints that somebody could share with me ?

Looking for your advices, thank you so much.

[Dennis_Knutson]

If the vendor says that continuous transmission results in 5-10 msec per character, then that might be what you have to live with. Have you contacted them to see if there is a faster mode? Perhaps reading as binary instead of ASCII?

And yes, serial is the slowest form of instrument communication.

[NCHU]

Hi Knutson,

Thank you for all your suggestions.