Hi folks,
problem solved. Previously, I only checked the GPIB addresses of present instruments.
I have now set the GPIB addresses of not-connected units (like the second source which I don't have) to 31 and the error is gone.
GPIB works flawlessly.
Btw, meanwhile I have also swapped the dead CMOS battery. Now the clock keeps ticking...
Two more questions:
1.
Upon power-up the unit comes up in factory state, i.e. in hold state. I would like it to come up sweeping. How can I change this?
Setting the user preset state is not sufficient.
2.
Is the low frequency behavior of the 8517A test set normal? I remember that some units have wideband bridges with no drop at low frequencies while others have couplers showing the drop at low frequencies. I'm not sure which type the 8517A is.
Tom
