Measurement Computing Serial488A - Manual (Page 21)

2.11
2.4 Terminator Selection
The Serial488A can be configured to provide RS-232 to IEEE 488 and IEEE
488 to RS-232 terminator substitution. This is useful when interfacing an RS-232
device which only issues carriage return [CR] as an output terminator to an IEEE
controller which expects a carriage return followed by a line feed [CR-LF].
In the above example, the serial terminator should be selected for CR Only while
the IEEE terminator is set to CR-LF. When a serial CR character is received, it is
discarded and substituted with an IEEE CR-LF. In the IEEE to RS-232 direction, the
IEEE CR is unconditionally discarded. Upon receipt of the IEEE LF, a serial CR is
substituted.
The Serial488A can be made totally data transparent by setting both the serial
and IEEE terminators to be CR Only or LF Only.
2.4.1 Serial Terminator Selection
SW2-3 and SW2-4 select the serial terminators for the serial input and
output. The factory default is LF Only.
SW2 View for Serial Terminator Selection
OPEN
1 2 3 4 5 6 7 8 DOT
Switch
Side
View
OPEN
1 2 3 4 5 6 7 8
CR Only LF-CR
OPEN
1 2 3 4 5 6 7 8
OPEN
1 2 3 4 5 6 7 8
LF Only CR-LF