ENDEVCO MODEL 4990A RACK
INSTRUCTION MANUAL
9
4.3
Default Jumper Settings for Ethernet Rack (4990A-1):
POS
S1
SWITCH
SETTING
REMARK
S2
SWITCH
SETTING
REMARK
1
OFF
(ON for snoop mode)
OFF
2
ON
EDAS RX
ß
à
back plane RX
OFF
3
OFF
OFF
(ON for snoop mode)
4
OFF
(ON for snoop mode)
OFF
(ON for snoop mode)
5
ON
EDAS TX
ß
à
back plane TX
X
6
OFF
X
7
X
X
8
X
OFF
baud rate = 19.2 kbd
4.4
Default Jumper Settings for RS-232 Rack (4990A-2):
POS
S1
SWITCH
SETTING
REMARK
S2
SWITCH
SETTING
REMARK
1
ON
front panel RX
ß
à
back plane RX
OFF
(use POS1 ON for reversed
cable, TX <- -> RX)
2
OFF
OFF
(use POS2 ON for reversed
cable, RX <- -> TX)
3
OFF
ON
straight cable (TX
ß
à
TX)
4
ON
front panel TX
ß
à
back plane TX
ON
straight cable (RX
ß
à
RX)
5
OFF
X
6
OFF
X
7
X
X
8
X
ON
baud rate = 9.6 kbd (OFF for
19.2kbd)