Thank you Percy for getting back to me. "So really, some one still having and attempting to usie the very first and now historic generation of Signal Ranger "SR-STD or ST-SP2"?" Yes, and I still wear bell bottom jeans too! Yes, I am aware of the 2 volts limit on this device. I ran the sr_spm_control.py script and was able to get the offsets to appear on OUT1 and OUT2 (SR panel labels used here) so some progress. However, when I try a scan i get no scan signals on OUT4 or OUT5 and the "tip" does not...
So, getting back to this after a hiatus in administration... Made good progress - can run gxsm and can get the green light on my SR-STD. Did some testing 1) can change the bias voltage output 2) connect bias output to tunneling input and by changing the bias I can get the Zs output to swing from one extreme to the other 3) changing feedback parameters alters rates at which Zs responds Problem comes when I try a scan When i put a scann offset in either X or Y, the output voltage on Xs or Ys respectively...