Richard Lukes wrote:

The model 1650/6 is intended for computer control and has only two
crystal filters installed (3kHz and 8kHz). It also has a 100kHz IF
output, however, I do not understand what this output was intended to
be used for. Was it for an external FSK demodulator?

Maybe. Or an external product detector or a panadaptor. IF outputs
are very useful for all kinds of things.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."