Models LB480A/LB680A
USB Powe™
Product Manual PPA (Pulse Profiling Application)
Revision: 08/02/11
41
Triggering & Delay Toolbar
Internal Auto Level Trigger
Various triggering methods are provided from this toolbar. The
Internal Auto Level
trigger is determined by sampling
the incoming signal. The general algorithm is as follows:
Sample the incoming signal
Examine the data for maximums and minimums
Set the trigger level between the maximum and minimum (favoring the maximum)
Take a trace using the standard process (same as manual trigger)
The
Internal Auto Level
is set for each trace so as the input varies the auto trigger level will be adjusted accordingly.
Therefore, while the
Internal Auto Level
is more convenient (and quite reliable) it also can be somewhat less
responsive. The
Internal Auto Level
trigger source is not recommended when peak input levels fall below
approximately -50dBm (See
Internal Manual Level
trigger for inputs below -50 dBm).
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.
