[Test-Equipment] Motorola Digital Frequency Meter Help

[Floyd Petri]

I have a Motorola Digital Frequency Meter Model SLN6365A manufactured by Systrom-Donner Corp. for Motorola. The top half has a digital readout frequency meter and the bottom half is a Deviation Meter. I am looking for a manual on it or a copy of a manual for it. At the very least does anyone know how to use the deviation meter that could tell me how to use it? There is a 25-50 Mhz tuner, a Meter Range switch with Battery Check, Tune, 20kHz, 6kHz, 2kHz, Cal.1, and Cal.2 and a + - Deviation Switch. There is also a RF gain control.

Floyd