Epson Multi-mode Data Controller MFJ-1278B Benutzerhandbuch
MFJ-1278B MULTI-MODE HARDWARE
JUMPER FUNCTIONS
The following table lists the function of each jumper on the MFJ-1278B. For normal
operation a shorting jumper must be placed on the following connectors: JMP 5; JMP 8; JMP
9 pins 2,3; JMP 13; JMP 14 pins 1,2; JMP 16 pins 1,3 and pins 2,4; JMP 18 pins 1,2; JMP
19 outside pair (one top,one bottom); JMP 22 pins 2,3; JMP 24 pins 1,2; JMP 26 pins 1,2;
JMP E, F, G, H. Also on the mode disconnect header J4 the following pins need jumpers
pins 1,2 11,12 13,14 17,18.
operation a shorting jumper must be placed on the following connectors: JMP 5; JMP 8; JMP
9 pins 2,3; JMP 13; JMP 14 pins 1,2; JMP 16 pins 1,3 and pins 2,4; JMP 18 pins 1,2; JMP
19 outside pair (one top,one bottom); JMP 22 pins 2,3; JMP 24 pins 1,2; JMP 26 pins 1,2;
JMP E, F, G, H. Also on the mode disconnect header J4 the following pins need jumpers
pins 1,2 11,12 13,14 17,18.
Table 8-1: Jumper Function
Jumper #
Position
Function
JMP1
Pin 1 & 2
!DCD (RS-232C) stays on
Pin 2 & 3
!DCD (RS-232C) stays off
OFF (default)
!DCD reflects connect status
JMP2
Pin 1 & 2 (default)
4.92 MHz CPU clock
Pin 2 & 3
2.46 MHz CPU clock
JMP4
ON
disable Tx watch-dog
OFF (default)
enable Tx watch-dog
JMP5
ON (default)
Lithium battery connected
OFF
Lithium battery disconnected
JMP7
ON
analog loopback mode
OFF (default)
normal modem operation
JMP8
ON (default)
demodulator enabled
OFF
demodulator calibrate
JMP9
Pin 1 & 2
calibrate U16 tones
Pin 2 & 3 (default)
normal modem operation
JMP10
ON
digital loopback mode
OFF (default)
normal modem operation
JMP11
LEFT
transmit data NRZ
RIGHT (default)
transmit data NRZI