Further, if I use 131072 (2^17) as the length, I get an error : Traceback (most recent call last): File "takedata.py", line 74, in ? x=sr.querytrca(srs,1,0,4000,131072) File "/home/labmonkey/code/oledpmt/sr830.py", line 62, in querytrca trca=sr.read(n) File "/usr/lib/python2.3/site-packages/Gpib.py", line 22, in read self.res = gpib.read(self.id,len) gpib.error: Read Error: ibrd() failed
Following this, an attempt to run the script again chokes at the first (harmless - just setting some instrument parameter - ibwrt() fails) gpib command and then locks the bus, freezing the whole system unless I reboot the system. This has happened twice. I am using the Agilent82357a USB to GPIB convertor. Have used it for numerous purposes with the same setup, but the library seems to be choking on this new application. The instrument I am trying to use is an SR830 lockin amplifier. -- http://mail.python.org/mailman/listinfo/python-list