Models 2500 and 2502 User’s Manual SCPI Command Reference 17-75
Use the following table to determine the parameter value for the desired
decimal digital output pattern:
ACTual?
:SOURce3:TTL[:LEVel]:ACTual? Query bit pattern on digital output port.
Description This query command is used to read the bit pattern that is actually on the
digital output port.
MODE <name>
:SOURce3:TTL4:MODE <name> Control digital I/O port line 4 mode
Parameters <name> = EOTest Use line 4 as EOT signal
BUSY Use line 4 as BUSY signal
Query :MODE? Query digital I/O line 4 mode
Description This command controls the operation of digital I/O line 4 to act as either
an End-of-Test or Busy signal in the 3-bit output mode. EOT is not auto-
matically controlled in 4-bit mode. See “BSIZe <n>,” page 17-76. Like-
wise, with BUSY enabled in the 4-bit mode, the unit behaves as if it
were in 3-bit mode by ignoring all attempts to drive digital I/O line 4.
OUT 4 OUT 3 OUT 2 OUT 1
Decimal
value*
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L = Low (Gnd)
H = High (>+3V)
* 0-7 in 3-bit mode.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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