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

 

Page 311
Image 311
Epson MFJ-1278B manual JMP16, JMP17, JMP18, JMP19, JMP20, JMP21, JMP22, JMP23, JMP24, JMP25