Name: Keithley 2002
Brand: Keithley
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IEEE-488 Reference

3-116

3.19 :SOURce subsystem

This subsystem is used to set the logic level (true or false) of each digital output line. The com-

mands for this subsystem are summarized in Table 3-11.

[:LEVel]

:SOURce:TTL[1]:[LEVel] Control digital output line #1

:SOURce:TTL2:[LEVel] Control digital output line #2

:SOURce:TTL3:[LEVel] Control digital output line #3

:SOURce:TTL4:[LEVel] Control digital output line #4

= 1 or ON Set output line true

0 or OFF Set output line false

[:LEVel]? Query logic level of speciﬁed line

These commands are used to set the logic levels for the digital output port. The actual level (high

or low) of a digital output line depends on its programmed polarity (see Output subsystem). If

the polarity of a line is active-high, then that line is high when it is set to be true (1 or ON), and

low when it is set to be false (0 or OFF). Conversely, if polarity is active-low, the line is low

when it is set to be true, and high when it is set to be false.

NOTE

If a LIMITS control is enabled (LOLIM1 or 2, HILIM1 or 2—High, Low, or

Pass), this command does not check or change the output status. Refer to para-

graph 2.12.5 for information on limits.

PRINT #1, "output 16; :sour:ttl on; ttl?" ' Set line #1 true

PRINT #1, "enter 16" ' Get response from 2002

Parameters

Query

Description

Program fragment

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