4
Audio Analyzer Measurement Functions
212
Keysight U8903B User’s Guide
Table 4-14
Analog/Digital/
Bluetooth
Analyzer > Functions > SMPTE IMD menu description
Menu
Description
Unit
Press the
Unit
softkey to select the measurement unit.
– dB
–
Δ
dB
– %
– x
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).
– Delta
Selecting Delta will return the measurement result by deducting the reference ratio from the measured ratio. The result
will be returned in unit
Δ
dB.
– Linear
Selecting Linear will return the measurement result by dividing the measured ratio by the reference ratio. The result is
returned in unit x.
Set to 0dB
This is only available for the analog analyzer.
Press the
Set to 0dB
softkey to store the measured ratio as the reference ratio, and set the measurement reading format to
Delta.
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 ratio.
Ref. Ratio
Press the
Ref. Ratio
softkey to set the reference ratio.
Freq Lock
This is only available for the analog and
Bluetooth
analyzer.
Press the
Freq Lock
softkey to select the searching method for the upper and lower frequencies.
– Gen Lock
Selecting Gen Lock will allow the U8903B to search for the upper and lower frequencies of the input signal based on the
upper and lower frequencies of the respective generator channel. You can select the generator channel by setting the
Src Channel
in the
Meas. Config.
menu page. This Gen Lock method is only useful if you use the internal audio
generator.
– Custom
If you have a known input signal, you can define the upper and lower frequency values by setting the searching method
to Custom and setting the frequency value in
Upper Freq
and
Lower Freq
.
U
pper Freq
Press the
Upper Freq
softkey to set the upper frequency value. This setting is only available when
Freq Lock
is set to
Custom.
Lower Freq
Press the
Lower Freq
softkey to set the lower frequency value. This setting is only available when
Freq Lock
is set to
Custom.
Содержание U8903B
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Страница 42: ...1 Getting Started 42 Keysight U8903B User s Guide LCD display Figure 1 4 U8903B LCD display 2 3 1 4 ...
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Страница 574: ...A Appendixes 574 Keysight U8903B User s Guide Figure A 11 Bluetooth generator sine waveform generation ...