Epson MFJ-1278B manual Multilevel xmit...1900

MFJ-1278B MULTI-MODE APPENDIX B MODEM CALIBRATION

7.Adjust R77 for 2200Hz +/- 2Hz. Press the SPACE BAR.

8.Adjust R105 for 2295Hz +/- 2Hz. Press the SPACE BAR.

9.Adjust R106 for 2125Hz +/- 2Hz. Press the SPACE BAR.

10.Adjust R122 for 2125Hz +/- 2Hz. Press the SPACE BAR.

NOTE: If recalibrating the VB modem for Low Tone RTTY, then remove the jumper from JMP G, and adjust this control for 1275Hz. +/- 2Hz.

11. Adjust R119 for 2975Hz +/- 2Hz.

NOTE: If recalibrating the VB modem for Low Tone RTTY, then remove the jumper from JMP H, and adjust this control for 1445Hz. +/- 2Hz.

12.Press the SPACE BAR, the MFJ-1278B will respond with:

Multilevel xmit...1900

13.Adjust R307 for a reading of 1900Hz. +/- 1Hz.

NOTE: For step 14 the frequency readings on the frequency counter should be compared to the frequency readouts indicated by the MFJ-1278B. Note that the difference in the two readings can be as much as 20Hz, this is normal.

14.With each press of the SPACE BAR, the MFJ-1278B will display the following frequencies:

1550Hz	+/- 20Hz.
1600Hz	"
1650Hz	"
1700Hz	"
1750Hz	"
1800Hz	"
1850Hz	"
1950Hz	"
2000Hz	"
2050Hz	"
2100Hz	"
2150Hz	"
2200Hz	"