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Test instruments support Bluetooth EDR transmitter test cases

Posted: 15 Jun 2005 ?? ?Print Version ?Bookmark and Share

Keywords:anritsu? mt8850a? mt8852a? vluetooth test set? edr transmitter?

Supports all EDR transmitter test casesHere's some new test software that lets Anritsu Co.'s MT8850A and MT8852A Bluetooth test sets perform all three EDR (enhanced data rate) transmitter measurements defined in the latest Bluetooth standard. With this rollout, Anritsu claims its $16,800 MT8850A and $22,100 MT8852A are the first test instruments that support all EDR transmitter test cases.

The MT8850A is specifically designed for testing of Bluetooth RF links. For its part, the MT8852A offers all of the RF layer measurement capability of the MT8850A but adds support for audio measurements.

The MT8850A and MT8852A also de-modulate packets transmitted from EDR Bluetooth devices-under-test without the need to establish a test-mode connection. This makes the application useful for developers of Bluetooth EDR chips, supporting radio layer measurements before the completion of test-mode signaling development within a chip's protocol stack.

EDR test capability lets you test the transmitter performance of an EDR chipset and Bluetooth products against industry standards. The new software lets you do that quickly, reducing development time.

Version 2.0 capabilities
A word about EDR. It's a feature of Bluetooth v2.0 adopted by the SIG (Bluetooth Special Interest Group) in 2004. EDR provides a maximum data rate of 3Mbps, enhancing Bluetooth for audio/visual and file transfer applications, plus reducing dissipation (the transmitter isn't active as long). The previous maximum data rate for Bluetooth was 1Mbps.

Devices equipped with EDR retain full backward compatibility with previous Bluetooth versions, since EDR is built on top of the Bluetooth v1.2 spec.

Pre-qualification testing
The release of the software also provides an affordable test approach to verify the performance of devices before submitting them for qualification. After you install the software in an existing MT8850A or MT8852A, the test sets can perform all three EDR transmitter measurements defined in the new Bluetooth standard. The test sets can then measure differential power, carrier-frequency stability, and DEVM (modulation accuracy), as well as detect transmitter encoding errors.

The EDR relative transmit power measurement displays the differential power for GFSK (Gaussian frequency-shift keying) to PSK (phase-shift keyed) modulation with 0.2dB accuracy for differential power of less than 6dB. Carrier frequency stability error and block frequency error accuracy is 1kHz, while DEVM accuracy is less than 5 percent RMS for both pi/4DQPSK and 8DPSK modulation.

Differential phase encoding displays packet error analysis with the number of failed symbols. All major packetsincluding 2-DH1, 2-DH3, 2-DH5, 3-DH1, 3-DH3 and 3-DH5are supported by Anritsu's new software.

The EDR transmitter test software is priced at $5,000, and is available for immediate delivery.

- Alex Mendelsohn

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