Ophir Optronics Ltd QSR Manual De Usuario
Chapter 7 – External Triggers and
Missing Pulses
Missing Pulses
This chapter provides an overview and instructions for working with External
Triggers and Missing Pulses. These are supported only by the Pulsar device.
Triggers and Missing Pulses. These are supported only by the Pulsar device.
Topics in this chapter include:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Overview of the External Trigger
The Pulsar device includes an External Trigger BNC connector, which can be
used as an external trigger input or output when using energy detectors
(pyroelectric or PD10 heads).
used as an external trigger input or output when using energy detectors
(pyroelectric or PD10 heads).
When configured as an input, a signal can be connected from the sync output of
a laser or laser-system to the BNC connector. It can be used to detect and log
missing pulses, or to lock out and ignore specific pulses or groups of pulses that
are not interesting.
a laser or laser-system to the BNC connector. It can be used to detect and log
missing pulses, or to lock out and ignore specific pulses or groups of pulses that
are not interesting.
When configured as an output, the signal can be used to trigger external
circuitry in sync with pulses on the head detector.
circuitry in sync with pulses on the head detector.
Hardware Considerations
The External Trigger input characteristics:
Can be driven by any digital signal, TTL or CMOS, 3.3v or 5v logic.
Can tolerate input voltages between 10v and -10v.
A voltage is considered high when it is 2.4v or greater.
A voltage is considered low when it is 0.6v or smaller.
The External Trigger output characteristics:
Drives ~3.3v high level.
Drives ~0v low level.
StarLab User Guide
62