Subject: Re: TDT Question From: "Ewan A. Macpherson" <emacpher@xxxxxxxx> Date: Wed, 9 Aug 2006 15:46:41 -0500On 9 Aug 2006 at 14:25, Larry Feth wrote: > Apparently the TDT User Group is no longer active, so I will ask my > question here. Does anyone have software for programming the TDT > System II programmable attenuators (PA-4) using the serial port? I > asked at TDT and was told that no one who works there now knows how to > do it. The instructions in the manual are less than straightforward. Last year I put together some Matlab code to do this. I've placed it at: http://www-personal.umich.edu/~emacpher/misc/grab/xbusserial.m I was having trouble using the Matlab Serial Port Object in Matlab 7 (works fine in Matlab 6), so there is some duplication of code for using the SPO or alternatively the cport .dll, which I think I obtained from the Matlab user-contributed files archive. Cport turned out not to work reliably when using two serial ports simultaneously. In any event, this should show you what needs to be sent down the serial line to the XBUS for the PA4s. best wishes, Ewan Macpherson -- Ewan Macpherson, Ph.D. <emacpher@xxxxxxxx> Research Investigator, Central Systems Laboratory Kresge Hearing Research Institute, U. Mich. http://www-personal.umich.edu/~emacpher