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Capacitance (outputs disabled): < 20pF, typical
E1453 Pod Outputs:
Maximum Continuous Output Current:
High, Open-Circuit: 4.3V, min.
High, Sourcing 24mA: 3.7V, min.
Low, Open-Circuit: 0.1V, max.
Low, Sinking 24mA: 0.44V, max
Capacitance (outputs disabled): < 15pF, typical
Trigger Specifications
Function: The Sequencer can be programmed to Arm the Trigger system at the beginning of any Timing
Cycle. When this occurs, the system enters the Waiting-for-Trigger state and all Timing Generators stop.
Once a trigger is received from the selected source and delayed by a programmable amount, the Timing
Generators resume operation. If the delay for a certain trigger event expires before the system is in the
Waiting-for-Trigger state, then that trigger will have no effect. If a second trigger is received before the
delay for a previous trigger has expired, the second trigger will have no effect.
Trigger Sources: Eight VXI TTL trigger busses, two VXI ECL trigger busses, TTL- and
ECL-compatible front-panel coaxial connectors (SMB-type), and a TTL-compatible input on E1453 Pod
(if present). There is also an "Immediate" source which has the effect of triggering the system
immediately upon entering the Waiting-for-Trigger state. Finally, the system can be triggered
programmatically, regardless of the selected source.
Trigger Slopes: The VXI ECL and TTL inputs are sensitive to rising and falling edges, respectively.
Coaxial and Pod inputs can be programmed to be sensitive to rising or falling edges. There is no slope
associated with the "Immediate" source.
Trigger Qualification: Triggers from any source but "Immediate" can be qualified by a user-defined
Boolean expression ("CONDition3") of the ten "Q" inputs. (Refer to "Wait-For-Condition
Specifications", following, for details of how this expression is defined.) When the "Q" inputs are in a
state which makes the expression true, triggers are recognized; when the expression is false, triggers have
no effect. This function can be programmatically disabled, resulting in unqualified triggering. Triggers
from the "Immediate" source are always unqualified.
Programmable Trigger Delay: The latency time of any trigger source but "Immediate" can be
programmatically increased by 0 to 409.59375
un-delayed latency times.
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±
24mA per line
µ
s in steps of 6.25ns. See "Trigger Timing" (following) for
Agilent E1450 Specifications A-3
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