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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