[R-390] monitor scope

[Tim Shoppa]

> hook up a monitor scope to it so I can look at the incoming signals, the
> scope is a yaesu yo 301

Most straightforward way is probably to hook the IF out to the y axis.

To the x-axis you can hook up either a 60Hz source (I think the yo 301
has this as one of the x-axis selections) or hook it to the 600 ohm
line output.  Not sure exactly why you'd want to do the latter but you
ought to see the modulation trapezoid if you do.

There's probably some way to hook up a sweep generator and detector
to turn the yo-301 into a spectrum scope at the IF frequency but it
takes some electronics.

Hooking the R-390A, a sweep generator, and the scope together would
be a handy way to do IF and some RF alignments.

Tim.