302 Chapter 5
Concepts
Audio Measurement Concepts
Audio Measurement Concepts
Audio Frequency Measurement Concepts
Purpose
Audio Frequency measures the accurate Audio Frequency of an audio signal
applied to the Audio port.
Measurement Technique
The audio frequency is calculated by a time domain counter. See Figure 5-12 on
page 302 for a graphical explanation of the process.
Figure 5-12 Audio Diagram
Audio AC Level Measurement Concepts
Purpose
Audio AC Level measures the true RMS level of an external signal.
Measurement Technique
The audio AC level is the average power of an external input audio signal. The true
RMS level of audio signal can be measured using the RMS detector. Audio AC
Level will not measure the DC level of an audio signal.
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