Fixing connectivity issues on the SR510 over GPIB

[Chernyshev]

Contrariwise gpib is working only without rs232 echo.

But you have right, I have another problems.

[JanNJ]

I have similar problems with SR510 connected with GPIB-USB-HS.

I found out that using command W n (n can be from 1 to 255) (by default set W 6 when turn on) one can slow down sending (reading) commands.  The W 20 works for me.  Problem was to send initial command but I read the discussion before and it works now.