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Epson Multi-mode Data Controller MFJ-1278B Manuel D’Utilisation

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MFJ-1278B MULTI-MODE    APPENDIX G: JUMPER FUNCTIONS 
Table G-1: Jumper Function (Cont.) 
JMPF*** 
ON  (default) 
Disable Low Tone RTTY Demod 
 
OFF 
Enable Low Tone RTTY Demod 
JMPG*** 
ON (default) 
Disable Low Tone RTTY Mod 
 
OFF 
Enable Low Tone RTTY Mod 
JMPH*** 
ON (default) 
Disable Low Tone RTTY Mod 
 
OFF 
Enable Low Tone RTTY Mod 
JMPJ 
ON 
TX audio has flat response 
 
OFF  (default) 
TX audio 6db/oct pre-emphasized 
JMPK 
ON 
TX audio loopback to PTT 
 
OFF  (default) 
(for Radio Port 2) 
JMPL 
ON 
TX audio loopback to PTT 
 
OFF  (default) 
 (for Radio Port 1) 
JMPR 
ON 
Analog audio loopback 
 
OFF  (default) 
(for Radio Port 1) 
JMPX 
ON  (default) 
Speaker Transmit Tone Enable 
 
OFF 
SpeakerTransmit Tone Disable 
JMPY 
ON  (default)  
Speaker Receive Tone Enable 
 
OFF 
Speaker Receive Tone Disable 
JMPZ 
ON  (default) 
Speaker Connect Tone Enable 
 
OFF 
Speaker Connect Tone Disable 
 
*  When JMP23 is shorted, it will RESET the MFJ-1278B.  This means that all parameters 
will be reset to the default values.  This is the same as removing the bbRAM battery except it 
is much quicker. DO NOT SHORT THIS JUMPER MORE THAN A COUPLE OF 
SECONDS, OTHERWISE BATTERY DAMAGE COULD RESULT!! 
 
**  MFJ offers an optional Real-time clock module (MFJ-43) that can be installed on the 
MFJ-1278B mother board.  This clock keep the MFJ-1278B clock running all the time. You 
will not have to reset the clock everytime you turn the MFJ-1278B on. 
 
***  When these jumpers (JMP E, JMP F, JMP G, JMP H) are removed the MFJ-1278B will 
operate RTTY using the European tone standard, when the VB modem is selected.  All four 
jumpers must be removed in order to operate RTT using the European tone standard.