What is an 89090A. A search of Agilent's site did not return any results.
Can you attach the programming manual or something that explains the command you are sending? Typically, a query is terminated with a ? so the read timeout would be expected, though the fact that it does not support *IDN? could mean that the instrument has no standard programming interface at all. You obviously can run only queries that are listed in the manual.
The manual is this one:
On the device it said Agilent 89090A on it.
Okay, I searched test and measurement.
From your screen shot, it does not look like you are sending the correct terminator. By default, only EOI is sent.
ok you mean this? What am I supposed to do with it?
I typed in "REM ON" and still gives me the error
I use VISA but I believe the 488 tool works the same way - simply type in the control characters after the command string.
You also have the EOS configuration there and on the GPIB properties page.