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Chapter 9. Audio Measurements
(MT8852A only)
The MT8852A Bluetooth Test Set can be used to perform audio measurements by
establishing a Synchronous Connection Oriented (SCO) link between the MT8852A and
the EUT. A SCO link is a full duplex link between a Bluetooth master and slave.
Note: It should be noted that SCO is an optional feature within the Bluetooth
specification. The MT8852A can be used to establish a SCO link and transmit
HV packets to, or from, the EUT. To perform audio measurements, an audio
signal source and audio analyzer are also required (e.g., Keithley 2015).
There are four basic scenarios in which audio measurements may be made, each of which
is illustrated and explained in this chapter. The four test scenarios are:
• Testing the EUT’s audio performance using remote loopback on the MT8852A.
• Testing the audio performance of the EUT transmit path.
• Testing the audio performance of the EUT receive path.
• Putting the EUT into remote loopback.
Testing the EUT’s Audio Performance Using Remote
Loopback on the MT8852A
The EUTs audio performance can be tested using the set-up below. The MT8852A is put
into remote loopback and the audio path tested without passing the signal through the
MT8852A CODEC. The audio is looped back in the MT8852A baseband and so there is
no audio distortion introduced by the tester.
1. Press the
button.
2. Choose “MT8852A” and press the
key to display the MT8852A Configuration
screen.
3. Choose “Audio” and press the
key to display the screen below.
13000-000109 9-1
June 2003 Audio Measurements