Keysight N9915-90020 User’s Guide 307
IQ Analyzer (IQA) – Option 351
I/Q Analyzer (IQA) Mode Settings
pts = points
s = seconds
— Trigger Settings Opens the Trigger Settings softkey menu.
Then:
——
Trig Type Then select one of the following:
——Then depending on the trigger type selected, choose from the
following:
Trig Level – Sets the trigger level. This softkey is only active for
Video or RF Burst (default: –25 dBm, minimum: –210 dBm,
maximum: 30 dBm).
Trig Slope – Sets the negative/positive trigger slope. This
softkey is only active for External, Video, or RF Burst (default:
Pos).
Trig Delay – Sets the trigger delay. This softkey is only active
for External, Video, or RF Burst (default: 0s, minimum:
–150 ms, maximum: 500 ms).
Softkey Description
Free Run
(Default.) – Triggering is provided by the FieldFox internal
circuitry. A new acquisition begins when the previous
acquisition ends.
External
An acquisition is triggered on an external TTL signal at the
Ref In/Trig In connector on the FieldFox top panel.
Choose to trigger on the rising slope at about 1.7 V or on
the falling slope at about 1.0 V using the Trigger Slope
setting (below).
Video
An acquisition is initiated when the displayed amplitude
of an incoming signal crosses the settable Trigger Level.
This selection can detect low-amplitude signals, but also
has been filtered considerably and may not be a true
representation of the incoming signal.
RF Burst
An acquisition is initiated when the signal at the third IF
(analog) stage crosses the settable Trigger Level. This
selection offers a wider bandwidth and may be a better
representation of the incoming signal than Video trigger.
However, RF Burst is not as sensitive to triggering on
low-level signals.
Periodic
Periodic sets a trigger that repeats at the period rate
entered. Periodic trigger's phase can be altered by the
Offset value.
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