MFJ Multi-mode Data Controller -1278B User Manual page 270

MFJ-1278B MULTI-MODE
RXCAL
RXCAL is an immediate command. When invoked, the MFJ-1278B generates test signals
(based on CALSET -- see below) that are used by the internal tuning software to align the
demodulator components.
To use the RXCAL feature,
1. Align the modulator components as described in the owners manual.
2. Use the MODE command to select the demodulator to be tuned. Make sure JMP8,
JMP7 and JMP 4 are installed.
3. From the cmd: prompt type the command "CALSET n". Use the n value from the
CALSET Adjustment & Location Map on the next page.
4. From the cmd: prompt type the RXCAL command.
5. Tune the appropriate trimpot (R79, R113, R114, or R115) until the DCD light is lit
fully.
6. Continue tuning this trimpot until the CON and STA LEDs flash either alternately every
half second, and/or both light up
7. Return to step 2 until all the demodulators are tuned.
NOTE: RXCAL is not effective for alignment of the CW demodulator.
OPERATIONAL COMMANDS
Mode: All Immediate Command