A new bug fix Beta is available for the MD9600
See
downloads/MD9600/Firmware/Latest
This version fixed the 1750Hz 'tone burst' low deviation bug
It also improves APRS deviation
And also fixes Tx frequency offsets when transmitting 1750Hz tone or APRS
Additionally, the calibration screen user interface has been changed so that it is the same as the GD77.
Thanks to Colin G4EML for his help diagnosing this problem, and to Ian DJ0HF for testing.
Note.
The previous version had a lot of changes. See details here
viewtopic.php?f=18&t=3166