Chapter 3 111
Making Measurements
Audio Frequency Measurement
Audio Frequency Measurement
This procedure describes how to make a Audio Frequency measurement. In this
measurement example, a signal generator is the UUT and is adjusted to deliver a
test signal. Audio Frequency measurement is used to measure and display the
frequency of an audio signal. The measurable frequency range is from 20 Hz to
250 kHz.
CAUTION Make sure your input audio signal is under the allowed maximum safe input level
printed near the input connector.
NOTE You can make Audio measurements without a Power Meter since it is the PSA that
measures the Audio Frequency.
TIP Make sure the input and output impedance are matched. The PSA audio input has a
high impedance of 100 kΩ. The output impedance of your audio source may
impact the RMS level reading.
Measurement Procedure
Figure 3-23 Audio Test Connection Diagram
CAUTION Press the Restart key to optimize the measuring receiver configuration if you make
any changes to the UUT or to the measuring receiver settings after you make your
first measurement.
Step 1. Set up the system. See Figure 3-23, “Audio Test Connection Diagram.”.
Step 2. Make sure you have selected
Measuring Receiver mode in the MODE key menu.
Step 3. Adjust the signal generator to the desired settings for your test.
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