Keysight Technologies FieldFox A Series, User Manual

Page: 427 / 756

Keysight N9927-90001 User’s Guide 427
Interference Analyzer (SA Mode) – Option 236
Record/Playback (SA Option)
Record/Playback (SA Option)
Record Playback allows you to record SA trace sweeps and play them back at a
later time. Use this feature to monitor spectrum activity over a period of time.
You can record traces continuously, record a specified number of traces
(segments), or record when triggered by a specified power level.
Traces can be recorded from, or played back into, any measurement type (such
as Channel Power or Occupied BW) or any display type (such as Spectrogram
and Waterfall).
When GPS is enabled, the current location and elevation are saved and played
back with traces.
Recordings can be saved to the FieldFox Internal memory, an SD Card, or a
USB flash drive.
About Sessions
A Recording Session is a collection of recorded traces and the instrument
states that generated them.
Before recording can occur, a new session must be initiated or an existing
session must be opened. Sessions can later be opened for playing or continued
recording. Only one session can be open at a time.
You close the session when finished recording or playing. A session is also
closed when the FieldFox is Preset (or Mode Preset), an Instrument State is
recalled, or when Mode is changed from SA.
Each session is saved as a folder containing a set of files on the specified
storage device.
How long can a recording session last?
There are many variables that determine the possible length of a recording
session. But one key variable is the amount of available memory.
When a session is opened or a new session is initiated, an estimate is made of
the maximum number of traces that can be saved based on the available disk
space and the current number of data points (resolution). Recording will stop
when that number is reached. This estimate always keeps 4 MB of available
disk space on the specified storage device. You can decrease the number of
traces to further limit recording. The resolution setting can NOT be changed
after a session is opened.
To maximize the amount of space that is available, save recorded traces to a
USB Flash drive or SD card. Learn how in “Manage Sessions” on page 435 .
You can determine the length of time over which recording can occur by
setting the Record Interval (the time between recorded traces) and other
settings. Learn more in “Recording Configuration” on page 431 .