Test Instruments Supporting EDR Transmitter Test Cases Available From Anritsu
Richardson, TX -- Anritsu Company has introduced Enhanced Data Rate (EDR) transmitter test software for its MT8850A and MT8852A Bluetooth test sets. With the software, which is available immediately, the MT8850A and MT8852A are the first test instruments that support all EDR transmitter test cases. This capability allows Bluetooth developers to test the transmitter performance of their EDR chipsets and products against industry standards quickly, reducing development time.
The release of the software provides engineers with an affordable test solution to verify the performance of their devices before submitting them for qualification. After customers install the software in the MT8850A or MT8852A, the test sets can perform all three EDR transmitter measurements defined in the new Bluetooth standard.
With the software, the test sets can measure differential power, carrier frequency stability, and modulation accuracy (DEVM), as well as detect transmitter encoding errors. The EDR relative transmit power measurement displays the differential power for GFSK to PSK modulation with /-0.2 dB accuracy for differential power of <6 dB. Carrier frequency stability error and block frequency error accuracy is /-1 kHz, while DEVM accuracy is <5% RMS for both pi/4DQPSK and 8DPSK modulation. The differential phase encoding displays the packet error analysis with the number of failed symbols. All major packets -- including 2-DH1, 2-DH3, 2-DH5, 3-DH1, 3-DH3, and 3-DH5 -- are supported by the software.
The MT8850A and MT8852A demodulate packets transmitted from EDR Bluetooth devices under test without the need to establish a test mode connection. This makes the application ideal for developers of Bluetooth EDR chips, allowing radio layer measurements to be performed before the completion of test mode signaling development within the chip's protocol stack. The MT8850A has been specifically designed for rapid testing of Bluetooth wireless links. The MT8852A offers all of the radio layer measurement capability of the MT8850A and adds support for audio measurements.
Enhanced Data Rate is a feature of Bluetooth v2.0 adopted by the SIG in November 2004 (see related story). EDR provides a maximum data rate of 3 Mbps, enhancing Bluetooth for audio/visual and file transfer applications, plus reducing power consumption because the transmitter is not active as long. The previous maximum data rate was 1 Mbps. Devices equipped with EDR retain full backward compatibility with previous Bluetooth versions since EDR is built on top of the Bluetooth v1.2 specification.
Source: Anritsu