[R-390] URM-25 RF output measurement

[Paul H. Anderson]

I need to align a nice 67 EAC.  To set the receiver gain pot, I have to
set my URM-25 to 150 microvolts output (then adjust the gain until the
diode load voltage is -7 volts).  How can I tell if my URM-25 is actually
putting out 150 microvolts?  Do I need a calibrated RF meter with a known
input impedance and make sure that is matched to the output of the URM-25?

Thanks for any suggestions...

Paul