MFJ Multi-mode Data Controller -1278B User Manual page 343

MFJ-1278B MULTI-MODE APPENDIX B MODEM CALIBRATION
Calset Values for Various Modulator Tone Frequencies
Tone CALSET # Adjust
2125 247 R106
2295 229 R105
1300 404 R78
2100 250 R77
1200 438 R78
2200 240 R77
2125 248 R122
2975 177 R119
750 701 R139
775 678 R139
800 657 R139
825 637 R139
700 751 R139
1500 351 R138
2178 242 R122
2263 233 R119
1275 412 R122
1445 364 R119
Modem / Remarks
HF Packet & RTTY
Fc = 2200 Hz
170 Hz shift
Packet / Fc = 1700 Hz, 800 Hz shift. CCITT V.23 std.,
preferable for HF 1200 baud, works well on VHF FM too.
Packet / 1000 Hz shift standard. Too wide to fit comfortably
through SSB filters for linear mode 1200 baud use
VHF RTTY
Fc = 2550 Hz
850 Hz shift
CW
CW
CW
CW
CW / SSTV
SSTV
HF RTTY/ASCII/AMTOR Fc = 2220 Hz
850 Hz shift.
Low Tone RTTY (European Standard); 170Hz shift
Fc = 1360Hz.