Chapter 5
Test and Measurement Functions
Audio Controls and Signal Routing
Rev. 001
CX300 ComXpert Operation Manual
22130634
5 - 42
February, 2022
5.7 Audio Controls and Signal Routing
The test set’s audio signal routing, volume and squelch settings are configured on the
Audio Controls window. The Audio Controls window is used to configure settings such as
speaker routing, the signal source for performing noise measurements, and the
Oscilloscope input signal.
The Audio Controls window is displayed by selecting the
Audio Controls
button
from the
Quick Access Toolbar
(see
). The
Audio Controls
window contains the
following controls and settings:
Table 5-21 Audio Controls and Settings
Control/Setting
Description
Audio Volume
The audio slider bar adjusts the volume of the speaker’s audio.
The
Audio Control
button
is used to mute/un-mute the audio
signal.
Audio Squelch
The squelch slider bar is used to adjust the audio squelch level.
Squelch adjusts the threshold above which the CX300 receiver
recognizes a signal and starts measurements.
Table 5-22 Audio Signal Routing Controls and Settings
Control/Setting
Description
Signal Routing
This control selects the signal source used by the Speaker,
Oscilloscope, Noise meters or AF Frequency Counter.
Audio
When
Audio
is selected, the test set function uses the
signal being received at the audio input connector as the
signal source. Audio Input is selected in the Audio In pane.
See section 5.5.2, “Audio In”, on page 5-25
Demod
When
Demod
is selected, the test set function uses the
signal being received at the RF input connector as the signal
source.The RF input source is selected in the RF Receiver
See section 5.5.1, “RF Receiver”, on page 5-21
.
AF Gen
When
AF Gen
is selected the test set routes the signal
being generated by the test set’s internal AF Generator to
the speaker.
