Measurement-computing Serial488A Manuel d'utilisateur télécharger pdf (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

12345678

DOT

Switch

Side

View

OPEN

12345678

CR Only LF-CR

OPEN

12345678

OPEN

12345678

LF Only CR-LF

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Measurement-computing Serial488A Manuel d'utilisateur Page 21