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Models LB480A/LB680A USB PowerSensor+™
Product Manual PPA (Pulse Profiling Application)
External TTL Trigger
The external TTL trigger mode requires the user to connect an external SMB cable with an incoming TTL signal. Use
this capability to trigger on an input that is not level dependent or for very low signal levels approaching the noise floor
of the sensor. See the Averaging & Filters Toolbar section for more information on measuring low level signals.
All trigger modes can use positive or negative Edge triggering as well as Cont (continuous) or Sngl (single) sweep.
The trigger Delay function (up to 10 msec) must be enabled/disabled from the delay window as shown below. The
standard LB480A power sensor has External TTL input/output connectors labeled TI/TO (SMB-male). See the trigger
limits in the specifications section of this document (or the LB480A data sheet) to employ the External TTL trigger
capability utilizing the trigger connectors on the sensor body.
NOTE: An incoming pulse must be on at least 0.20 usec followed by at least 1 usec of off time for the sensor to
properly trigger.
Revision: 08/02/11
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