[RTTY] Dual Receive?

[NA6MB Mike]

I have a FT-2000 which has two receivers, which is nice for working split.
I have seen some references to receiving two channels unsing N1MM+ or HRD
to do split on RTTY.
I have not had good luck working DXpeditions that are split.
Only worked if in the audio band of the RTTY program.
That is Rx 5kHz up, but not 20kHz.

Were can I find info on working RTTY (wide) split?

Mike
NA6MB