MFJ Multi-mode Data Controller -1278B User Manual page 358

MFJ-1278B MULTI-MODE APPENDIX G: JUMPER FUNCTIONS
Table G-1: Jumper Function (Cont.)
JMPF*** ON (default)
OFF
JMPG*** ON (default)
OFF
JMPH*** ON (default)
OFF
JMPJ ON
OFF (default)
JMPK ON
OFF (default)
JMPL ON
OFF (default)
JMPR ON
OFF (default)
JMPX ON (default)
OFF
JMPY ON (default)
OFF
JMPZ ON (default)
OFF
* 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.
Disable Low Tone RTTY Demod
Enable Low Tone RTTY Demod
Disable Low Tone RTTY Mod
Enable Low Tone RTTY Mod
Disable Low Tone RTTY Mod
Enable Low Tone RTTY Mod
TX audio has flat response
TX audio 6db/oct pre-emphasized
TX audio loopback to PTT
(for Radio Port 2)
TX audio loopback to PTT
(for Radio Port 1)
Analog audio loopback
(for Radio Port 1)
Speaker Transmit Tone Enable
SpeakerTransmit Tone Disable
Speaker Receive Tone Enable
Speaker Receive Tone Disable
Speaker Connect Tone Enable
Speaker Connect Tone Disable