[ICOM] PRO3 and SignaLink USB

[allan1 dejazzd.com]

   I  wish  to  operate  RTTY.   I know that the PRO3 only has MACROS for
   XMT.   I purchased the SignaLinkUSB assuming that I could just hook it
   up  with  the  supplied  cable to the PRO3.  I am using MMTTY so I can
   receive  on  a  large  screen.   I can view RTTY in LSB as well as the
   RTTY mode.   However  when  I go to transmit the MMTTY Macros or  just
   XMT, I  only  have  power on the PO meter in the RTTY mode and no RTTY
   modulation
   Does  anyone  have experience with the PRO3 and the SignaLink USB unit
   on RTTY? Thanks Allan W2TN