Epson manual MFJ-1278B MULTI-MODE Appendix B Modem Calibration

MFJ-1278B MULTI-MODE APPENDIX B MODEM CALIBRATION

NOTE: If you have a square wave on the scope face but the tuning indicator is not near center, you are on a false setting. Adjust R115 so that the tuning indicator is near center and THEN set the square wave duty cycle.

4.If MCW transceive operation with another station is desired, do the above procedure to BOTH MFJ-1278s using an agreed upon frequency for Fc. Then leave the modulator tone on the agreed on frequency with the demodulator Fc.

5.Remove jumpers placed at JMP 4 and JMP 7.

6.Remove the jmuper at JMP9 pins 1 and 2. Place it on JMP9 pins 2 and 3.

7.Remove the two jumpers from JMP16 pins 1 and 2 and pins 3 and 4. Place these jumpers on JMP16 pins 1 and 3 and pins 2 and 4. The jumpers on JMP16 will now be positioned horizontally, if the leds on the MFJ-1278 are facing you.

This completes the CW modem alignment procedure.