[RTTY] Upside Down

[Bill Rogers]

I'm sure someone out there has dealt with this one before.


I'm just getting going on RTTY.  All of my contacts (5 lucky BARTG contesters) so far have indicated that my transmissions are "upside down", inverted or otherwise not polarized properly.

The setup here is a Dell laptop (Win 95) connected to a Rigblaster Plus,  both MMTTY (running alone) and WriteLog (running alone) have been tried with the same result, TenTec Omni VI running FSK.  Everything else seems to be functioning OK so far.

If I use the "Reverse" button on MMTTY it changes both the receive and transmit orientation. This is good for transmission but bad for reception.  With Rttyrite software the shift from "FSK-Norn" to "FSK-Rev" makes it impossible to receive and doesn't seem to change the transmit FSK tones at all.   All I want to change is what's happening on transmit - preferably with any program I choose.  Since I have the capability in my transceiver, I'd prefer to continue with FSK.  It looks to me like I missed something in the documentation somewhere.  Any suggestions appreciated.

On the TenTec Omni VI the logic levels required are less than or equal to 1.0 Vdc for MARK and equal to or greater than 2.0 Vdc for SPACE.  
On the Rigblaster Plus "Key" output the miniplug tip provides a positive pulldown in respect to the sleeve.

73, Bill/ W3UL