SmartSDR - Is transmit limited by frequency and mode?

Bill Wuttke KE3BK

I'm trying to set up SmartSDR 2.5.1 / 6400M for an oddball RTTY mode (for Clatternet on 40 m) - 850 Hz shift M/S reversed. I can't use the normal RTTY mode, since it is LSB and automatically sets the mark and space frequencies based on that. I really need to use USB, since the TU I'm using doesn't have M/S reversal on transmit. I normally operate RTTY using either DAX or PC input and use PTT to key the radio. However, if I try to use USB or DIGU to get the M/S reversed, the PTT will key the radio, but no audio is transmitted although DAX shows the audio, SmartSDR doesn't. But, if I use either the SmartSDR MOX button or use VOX with DIGU, the radio will key and the audio is transmitted, but not with USB. The real question is does SmartSDR or the 6400M limit transmission by frequency and mode? Or, do I have a problem somewhere? Using the FHM2 mic, I can transmit anywhere in any mode.

WX7Y

Bill Wuttke KE3BK

George KF2T

 Check your transmit audio passband to ensure it’s wide enough for your desired tones, and a little extra.