Bluetooth in Automotive - Audio testing of BT components
Verifying functionality and performance of Bluetooth® components
Nearly all new vehicles today offer Bluetooth®handsfree equipment. Bluetooth® has become the established short range radio standard for communications between smartphones and infotainment systems in automobiles. The individual components must undergo RF and audio tests to ensure that the headset, speakers, infotainment system and smartphone all function smoothly with each other and are in line with the Bluetooth® SIG specifications.
Audio testing of Bluetooth® components
Audio signals can be transmitted with different Bluetooth® profiles: handsfree profile (HFP) for voice calls or advanced audio distribution profile (A2DP) for stereo playback.
To ensure correct performance, functional tests, interoperability tests and range tests need to be run. The R&S®CMW wideband radio communication testers were designed for such precertification testing and are approved by the Bluetooth® Special Interest Group (SIG).
Transmit characteristics such as power, spectrum, frequency accuracy, frequency drift, frequency deviation and the modulation index need to be verified with high accuracy. The R&S®CMW500 uses an integrated two-channel audio generator to check the Bluetooth® audio quality. It supports audio tests and all defined RF test cases. For the time-consuming spectrum measurements, the R&S®CMW testers provide first test results in less than one second – something no other Bluetooth® tester on the market can do.
- Flexible: support of all relevant wireless standards in a single box
- Complete: supports relevant codecs and profiles for audio transmissions
- Quality: highly accurate data from a precise generator
