Agilent Technologies E1445A, User'S Manual And Scpi Programming Manual

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[:STARt]:GATE:POLarity
TRIGger[:STARt]:GATE:POLarity < polarity > selects the polarity of the
Agilent E1445A’s front panel “ Stop Trig/FSK/Gate In” BNC which gates the
TRIGger:STARt subsystem. NORMal polarity selects an active high gate; INVerted
polarity selects an active low gate. This polarity is significant only when
TRIGger[:STARt]:GATE SOURce
is set to
EXTernal
. The programmed value is
retained but not used when other sources are selected.
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
< polarity > discrete INVerted | NORMal none
Comments
•
Executable when Initiated: Query form only
•
Coupling Group: Frequency
•
Related Commands: TRIGger[:STARt]:GATE:SOURce
•
*RST Condition:
TRIGger:STARt:GATE:POLarity INVerted
Example
Setting the Sample Gate Polarity
TRIG:STARt:GATE:POL NORM Sets active high gate.
[:STARt]:GATE:SOURce
TRIGger[:STARt]:GATE:SOURce < source > selects the source which gates the
TRIGger[:STARt] subsystem. The TRIGger[:STARt] subsystem is suspended (no
new samples are generated) while the selected gate source is asserted. Normal
sample generation resumes when the gate is unasserted.
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
< source > discrete EXTernal | TTLTrg0 through
TTLTrg7
none
Comments
•
The available sources are:
–
EXTernal: The Agilent E1445A’s front panel “ Stop Trig/FSK/Gate In” BNC
connector.
–
TTLTrg0 through TTLTrg7: The VXIbus TTL trigger lines.
•
When a VXIbus TTLTrg<n> line is selected as the gate source, the low level on
the line asserts the gate. The
TRIGger[:STARt]:GATE:POLarity
command selects
TRIGger
Chapter 8 Command Reference 393