[TenTec] ORION - RTTY ?

[Dave W7DPW]

I have down loaded the Orion manual and have browsed through it
looking for information on RTTY.  I notice that is is stated that AFSK
is used.  On the MODE menu I see FSK as one of the options.  I wonder
if the AFSK is generated internally, are there options for the shift
and the tones used, or if it's necessary to use the Audio IN  on the
AUX I/O Connections Figure 2-25  page 2-13..., I don't see any mention
of a Mark-Space connetction on the AUX I/O connections.

These is a short discussion of External Modems..  2.6 Using External
Modems, page 2-13

Does anyone have any idea about this ??

Dave W7DPW