User manual

IEEE-488 Reference
2001-900-01 Rev. K / August 2010 4-89
= ALOW Set polarity of specified line to active low.
Formats :outp:ttl:lsen <name>
:outp:ttl2:lsen <name>
:outp:ttl3:lsen <name>
:outp:ttl4:lsen <name>
Defaults Power-up No effect
*RST No effect
:SYSTem:PRESet No effect
Query :LSENse? Query polarity of specified line
Short-form formats: :outp:ttl:lsen?
:outp:ttl2:lsen?
:outp:ttl3:lsen?
:outp:ttl4:lsen?
Response message: AHIG or ALOW
Description These commands are used to set the polarity of the digital output lines. When set for active high (AHIGh)
polarity, the specified output line is true (ON) when the output level is high. The output line is false (OFF)
when the output level is low.
When set for active low (ALOW) polarity, the output line is true (ON) when the output level is low. The
output line is false (OFF) when the output level is high.
Programming example 10 OUTPUT 716; “:outp:ttl:lsen alow; lsen?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Sets the polarity of line #1 to active low.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the polarity of line #1 (ALOW).
4.18 :ROUTe subsystem
The commands in this subsystem are used to configure and control switching and are summarized in Ta-
ble 4-11.