Appendixes A
Keysight U8903B User’s Guide 511
THD+N
(Signal Analysis)
HPF
–None
–15 Hz
–20 Hz
–22 Hz
–30 Hz
–50 Hz
–70 Hz
–100 Hz
–200 Hz
–300 Hz
–400 Hz
– Custom
Select the high-pass filter.
Weighting
–None
–A
–CCIR 1k
–CCIR 2k
–CCITT
– C-Message
– Custom
Select the weighting filter.
Deemphasis
–None
–50 μs
–75 μs
– Custom
Select the de-emphasis filter.
Sample Size
–2048
–4096
–8192
– 16384
– 32768
– 65536
– 131072
– 262144
– 524288
–1M
–2M
Select the number of samples to be acquired for
the measurement.
Input Range
Auto Range
–On
–Off
Enable or disable the auto input range.
Track 1st Ch
–Enable
– Disable
Enable or disable the tracking of the first channel.
Voltage Range Set the input voltage range.
SINAD
THD Level
THD Ratio
THD+N Level
THD+N Ratio
Refer to “Bar chart” on page 548 for the bar
chart menu tree.
Table A-19 Measurement settings > THD+N menu tree description (continued)
Tab Level 1 Level 2 Level 3 Description
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