[Kenwood] How to Filter a TS-570DG on RTTY

[Pat Whelton]

I have an TS570DG with a SignaLink SL-1+ Interface.  Currently to operate
RTTY and use my CW filters I do the following:

VFO A RX FSK with filter

VFO B TX LSB offset up 2.13

It works great but is very inconvenient, as the VFO's do not track together.
If I try and just operate in SSB mode I have no filter.  If try and operate
in just RTTY, I have "no Diddle".  Any ideas on how to get my 400 hz INRAD
filter to work on SSB? The SignaLink is a SoundCard Interface.

On my son's Icom IC-718 he has determined that you can define the filter to
the mode (ie:  CW filter can work in SSB).

The end result I am seeking is to operate RTTY with a 400 hz filter (I find
the IF/DSP filtering not adequate) and not have to add and subtract 2.13 hz
from my transmit frequency.