Agilent Technologies FieldFox N9913A - Page 124

124 FieldFox User’s Guide
Typically you would use FreqMaskTrigger with Segment Count, but it can also be
used with Record Time and Record Interval.
When used with Segment Count:
o When a mask limit is exceeded, subsequent traces are recorded until the
specified segment count is reached. Once segment count is reached,
exceeding another mask limit will again cause traces to be recorded until the
segment count is reached, and so forth.
o To record only those traces that exceed the limit, set Segment Count to 1
o To record ALL traces after a limit is exceeded, set Segment Count OFF.
When used with Record Time, the timer counts down even when traces are not
being recorded (limits are not being exceeded). Recording starts when a limit is
exceeded and stops when the timer reaches 0.
When used with Record Interval, a trace is recorded when a limit is exceeded,
then no recordings during the specified ‘wait’ interval, then the next trace is
recorded, followed by another time delay, and so forth. This pattern repeats
indefinitely if Segment Count is OFF, or (if ON) until Segment Count is reached.
Frequency Mask Trigger Configuration
Create or recall a Frequency Mask to be used with the FreqMaskTrigger feature.
NOTE The Mask file is saved to, and recalled from, the Save /Recall Storage Device
location – NOT from the Record Playback Storage Device location. These are two
different settings. Learn how to set the Save /Recall Storage Device on page 166.
A mask that is in use during a recording is NOT saved with the recording and
does NOT automatically appear during playback. Like Limits Lines, it is saved
and recalled with a state file.
Although they are created in the same manner, Limit Line files and FreqMask
files can NOT be used interchangeably.
 Press Trace 6
 Then Record Playback Setup
 Then New Session or Recall an existing session. The current mask appears as
soon as a session is opened.
 Then FreqMaskTrigger Configuration
 Then choose from the following
o Edit Mask Create or modify the current mask. Learn how to edit the Mask /
Limit Line table on page 158.
o Save Mask Saves the current mask to a file.
o Recall Mask Loads a mask file.
Record Source
The simplest way to use Record Playback is to record RawMeas data, which is
can then be played back into all of the current Trace States.
However, for more complicated processing, refer to the following diagram. This
illustrates where in the FieldFox data flow data is recorded and played back.
NOTE For this discussion, it is important to understand Trace States. Learn more on
page 99.