Batboard

I have recently purchased a company with an R2400A test set.
How do you check SINAD? I am used to a Marconi 2955 which you inject a/f into AF in port and whala, SINAD on the sreen in RX SINAD mode. Can see audio on scope from Vert/SINAD port but SINAD measurement stays blank.

It's been a long time since I used one, but if I remember right, there were several functions that were internal options but the front panel still had the indictor LED's. Maybe you don't have that function at all.

The audio goes into the scope/dvm input on the front panel.