A Appendixes
464 Keysight U8903B User’s Guide
Functions
(THD+N Ratio)
Unit
–dB
– ΔdB
–%
–x
Select the unit type.
Format
–Off
– Linear
–Delta
Select the reading format of the returned
measurement reading.
Set result as ref. from Channels 1 to 2
Store the measurement result from the selected
channel as the reference ratio.
Ref. Ratio
Set the reference ratio value.
There is only one reference ratio for each channel.
Precision
–On
–Off
Enable or disable the precision mode.
Freq Lock
–Auto
–Gen Lock
– Custom
Select the searching method for the fundamental
frequency.
Fund Freq
Set the fundamental frequency value.
This setting is only available when the frequency
lock is set to Custom.
Functions
(THD+N Level)
Unit
– FFS
–dBFS
–%FS
–V
–dB
–dBV
–dBr
–x
–LSB
–Hex
–Dec
–dBSPL
Select the unit type.
Format
–Off
– Logarithmic
– Linear
Select the reading format of the returned
measurement reading.
Set result as ref. from Channels 1 to 2
Store the measurement result from the selected
channel as the reference frequency.
Ref. Level
Set the reference level value.
There is only one reference level for each channel.
Volt/FS Set the volts/FS reference value.
Precision
–On
–Off
Enable or disable the precision mode.
Table A-8 Digital analyzer menu tree description (continued)
Level 1 Level 2 Level 3 Level 4 Description
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