User`s manual

74 Agilent E1330B Digital I/O Module Command Reference
Chapter 5
DIGital:CONTroln:POLarity
[SOURce:]DIGital:CONTroln:POLarity <polarity> sets the CTL line voltage level
for logical true in port n to either TTL high for
POSitive polarity or TTL low for
NEGative polarity.
Parameters
Comments • Control lines are always accessed by their 8-bit port number.
• :CONTroln is the keyword used for commands relating to the control (CTL)
line at port n. The port number n must be the last character of the keyword
without spaces.
• If n is omitted, port 0 is used.
• The control line is used with the flag line to handshake data to and from
peripherals.
• Related Commands: [SOURce:]DIGital:CONTroln:POLarity?,
[SOURce:]DIGital:CONTrol
n[:VALue],
[SOURce:]DIGital:FLAG
n:POLarity,
[SOURce:]DIGital:FLAG
n:POLarity?
• *RST Condition: POLarity = POSitive.
Example DIG:CONT0:POL POS sets logical true to TTL high on port 0 control line.
DIGital:CONTroln:POLarity?
[SOURce:]DIGital:CONTroln:POLarity? returns a three character string, either
POS or NEG, indicating the logical true condition of the control (CTL) line at port n.
Parameters
Comments • :CONTroln is the keyword used for commands relating to the control (CTL)
line at port n. The port number n must be the last character of the keyword
without spaces.
• If n is omitted, port 0 is used.
Example DIG:CONT0:POL? queries the state of the logical true condition on port 0.
Parameter Name Parameter Type Range of Values Default
CONTrol
n
Numeric none, 0, 1, 2, or 3 0
<
polarity>
Discrete POSitive or NEGative None
Parameter Name Parameter Type Range of Values Default
CONTrol
n
Numeric none, 0, 1, 2, or 3 0