[Elecraft] Data Mode Sideband

[Mike Harris]

Guru's,

Trying to get a handle on a problem with frequency reporting in MMTTY. 
Not an operational issue, I just don't take any notice of MMTTY 
frequencies.  In AFSK A mode they are incorrect.

The following has become apparent, albeit undocumented.

Mode AFSK A normal LSB.  I assumed that if by using the ALT function and 
consequently switching to TX DATA REV that the sideband was switched 
from LSB to USB.  Apparently not the case.  It looks like keying is 
reversed but shifted in frequency on the waterfall by one keying shift 
value eg 170Hz.  However, whilst in data mode selection the sideband 
indicator does change from LSB to USB using ALT.

Mode DATA A normal USB.  Using the ALT function does indeed swap sidebands.

Can anyone confirm or deny this observation and is this the way it is 
intended to function?

Regards,

Mike VP8NO