Epson Multi-mode Data Controller MFJ-1278B User Manual
Page 312
MFJ-1278B MULTI-MODE HARDWARE
Table 8-1: Jumper Function (Cont.)
Jumper #
Position
Function
JMPB
ON (default)
On board transmit low tone
OFF
Out board transmit low tone
JMPC
ON
Enable external DCD
OFF (default)
Disable external DCD
JMPD
NOT used
JMPE***
ON (default)
Disable Low Tone RTTY Demod
OFF
Enable Low Tone RTTY Demod
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