Crosstalk Measurement - Keysight U8903B User Manual

4 Audio Analyzer Measurement Functions

Crosstalk Measurement

In audio systems with more than one channel, it is common for a signal in one channel to
appear at the output of another channel at a reduced level. Crosstalk refers to this signal
leakage across channels, and it is expressed in dB (default) or as a percentage.
Crosstalk is a measurement of the ratio of the signal amplitude in an unused channel
relative to that of a channel driven with a signal. The unused channels should be grounded
or set to an appropriate bias point. Crosstalk is largely due to capacitive coupling between
the channel conductors in the device and generally varies with frequency. Crosstalk can be
computed as follows.
Crosstalk
Phase measurement function mode is applicable for the analog, digital, and Bluetooth
audio analyzer. The settings for crosstalk measurement are displayed as shown in
Figure 4-48, Figure 4-49, and Figure 4-50 for the analog, digital, and Bluetooth analyzer
respectively.
Figure 4-48
228
rms value of signal measured
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
= 20 Log 10
⎝
rms value of signal driven
Analog Analyzer > Functions > X-Talk menu page 1
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Keysight U8903B User's Guide