Models LB480A/LB680A
USB Powe™
Product Manual PPA (Pulse Profiling Application)
Revision: 08/02/11
43
Internal Manual Level Trigger
The sensor is capable of triggering on the incoming signal from about -55dBm to +20dBm when
Internal Manual
Level
is selected and a value is entered as shown below. This trigger mode requires that you set the trigger level
manually. If you set the trigger level too high you will not get a trace. Instead you will
get a “Trigger?” message in the
middle top of the measurement grid. This message indicates that a trigger was not found. If the trigger is set too low
then the system will trigger on noise and you will get a noise trace.
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.
