[Elecraft] RIT/XIT

[Lyle Johnson]

> To save me bothering Gary again (he's busy enough as it is) is there
> anyone out there who can explain how the RIT or XIT offset is applied to
> the K2.  I can see it originates from the Front Panel and the voltage
> from the pot goes to U3 pin 16, but thats where I lose it.  Any ideas
> are most welcome :-)

The output of the front panel control is a DC voltage read by an
analog-to-digital converter internal to the main PIC processor (U6, control
board).  The processor calculates the PLL offset settings (applied to the
synthesizer chip [U14, RF board] on 5 kHz "boundaries" as well as to the DAC
[U5, RF board] that drives the PLL reference oscillator) and applies them on
transmit (XIT) or receive (RIT), as appropriate.

73,

Lyle KK7P