Keithley 6430 Instruction Manual page 393

<NDN>
Query
:TTL?
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.
Use the following table to determine the parameter value for the desired
decimal digital output pattern:
OUT 4
H
H
H
H
H
H
H
H
L = Low (Gnd)
H = High (>+3V)
*0-7 in 3-bit mode.
:ACTual?
:SOURce2:TTL[:LEVel]:ACTual?
Description
This query command is used to read the bit pattern that is actually on the
digital output port.
#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 digital output value
OUT 3
L L
L L
L L
L L
L H
L H
L H
L H
L
L
L
L
H
H
H
H
SCPI Command Reference
OUT 2 OUT 1
L L
L H
H L
H H
L L
L H
H L
H H
L L
L H
H L
H H
L L
L H
H L
H H
Query bit pattern on digital output port.
17-83
Decimal value*
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15