4 Audio Analyzer Measurement Functions
208 Keysight U8903B User’s Guide
Format
Press the Format softkey to select the format of the returned measurement reading.
–Off
Selecting Off will return the measurement reading without any formatting (raw value).
– Logarithmic
Selecting Logarithmic will return the measurement result by using the following formula:
The result is returned in unit dBr.
– Linear
Selecting Linear will return the measurement result by dividing the measured level by the reference level. The result is
returned in unit x.
–Delta
Selecting Delta will return the meausrement result by deducting the reference level from the measured level. The result
is returned in unit ΔV. This is only available for the analog analyzer.
Set to 0dB
This is only available for the analog analyzer.
Press the Set to 0dB softkey to store the measured level as the reference level, and set the measurement reading format to
Logarithmic.
Set result as ref. from Press the Set result as ref. from softkey to store the measurement result from the selected channel as the reference level.
Ref. Level Press the Ref. Level softkey to set the reference level value. There is only one reference level for each channel.
Ref. Imp
This is only available for the analog analyzer.
Press the Ref. Imp softkey to set the reference impedance value. This setting is only available if the unit is set to W and
dBm.
Volt/FS
This is only available for the digital analyzer.
Press the Volt/FS softkey to set the volts/FS reference value.
Cal SPL Press the Cal SPL softkey to set the calibrator level value. This setting is only available when the unit is set to dBSPL.
Even Harmonic
Press the Even Harmonic softkey to select the even harmonics.
–ALL
–2
–4
–6
–8
Odd Harmonic
Press the Odd Harmonic softkey to select the odd harmonics.
–ALL
–3
–5
–7
–9
Table 4-13 Analog/Digital/Bluetooth Analyzer > Functions > THD Level menu description (continued)
Menu Description
20 10
Measured rms voltage
Reference level
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