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17-74 SCPI Command Reference Models 2500 and 2502 User’s Manual

SOURce3

The following commands are used to set the logic level of the digital output lines, and con-

trol the pulse width of limit test output patterns that are sent to component handlers. Limit

tests are conﬁgured and controlled from the CALCulate7 Subsystem. For details on limit

testing, see Section 11.

Setting digital output

[:LEVel] <NRf> | <NDN>

:SOURce3:TTL[:LEVel] <NRf> | <NDN> Set digital output pattern

Parameters <NRf> = 0 to 7 Decimal format for 3-bit

0 to 15 Decimal format for 4-bit

<NDN> #Bx Binary format:

3-bit: x = 000 to 111

4-bit: x = 0000 to 1111

#Hx Hexadecimal format:

3-bit: x = 0 to 7

4-bit: x = 0 to F

#Qx Octal format:

3-bit: x = 0 to 7

4-bit: x = 0 to 17

Query :TTL? Query digital output value

Description This command is used to set the logic levels of the output lines of the

digital I/O port. When set high, the speciﬁed output line will be at

approximately +5V. When set low, the output line will be at 0V.

NOTE The maximum digital output value is 65,535 with the 2499-DIGIO option.

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Keithley 2500 User Manual

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