Epson Multi-mode Data Controller MFJ-1278B - Manual (Page 311)

MFJ-1278B MULTI-MODE HARDWARE
Table 8-1: Jumper Function (Cont.)
Jumper # Position Function
JMP16 Pin 1 & 2 Without multi-gray levels
Pin 1 & 3 (default) With multi-gray levels
Pin 2 & 4 (default) With multi-gray levels
JMP17 Pin1 & 2 2400 baud ext. modem clock
Pin 2 & 3 (default) 9600 baud ext. modem clock
JMP18 Pin 1 & 2 (default) Enable 19.2K baud termial
Disable 300 baud terminal
Pin 2 & 3 Enable 300 baud termial
Disable 19.2K baud terminal
JMP19 Outside pair(default) Enable 32K mailbox RAM
Middle pair Enable 128K mailbox RAM
Inside pair Enable 512K mailbox RAM
JMP20 ON (default) 512K mailbox RAM installed
OFF 32K or 128K mailbox RAM
JMP21 Pin 1 & 2 154 KHz to multi-level PCB
Pin 2 & 3 (default) 307 KHz to multi-level PCB
JMP22 Pin 1 & 2 Enable CW Grid Block Keying
Pin 2 & 3 (default) Enable CW Direct Keying
JMP23 ON Enable memory RESET
OFF (default) Normal operation
JMP24 Pin 1 & 2 (default) 1 Megabit firmware EPROM
Pin 2 & 3 512K bit firmware EPROM
JMP25 Pin 1 & 2 (default) Normal Demodulator operation
Pin 2 & 3 Demodulator Bypass
JMP26* Pin 1 & 2 (default) Normal +5Vb bbRAM operation
Pin 2 & 3 Real-time clock installed