110 U8903A User’s Guide
6 Frequency and Time Domain Analysis
• Flattop
The Flattop window has a flat ripple (<0.01 dB) in the
passband. Thus, it is applicable mainly for calibration
purposes where accurate amplitude accuracy is desired.
Acquisition Length
You can select how many points of the data record to
acquire and display. The possible acquisition lengths are as
follows.
• 256
• 512
• 1024
• 2048
• 4096
• 8192
• 16384
• 32768
Synchronous averaging
Synchronous averaging reduces noise levels by averaging the
acquired data in the time domain. This has the effect of
producing a "cleaner" waveform in the time domain, or
lowering the noise floor in the frequency domain display.
Synchronous averaging is only applicable when the trigger source is set to
the channel-based trigger. Refer to Input settings for the trigger settings.
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