Rohde & Schwarz CBT/CBT32 Bluetooth® Tester

The R&S CBT performs Bluetooth® RF tests on all channels in hopping or non-hopping mode. They offer a large number of statistical monitoring and measurement functions. It is possible, for instance, to define individual tolerances for each measured value and to stop a measurement sequence after a certain number of measurements or when a tolerance has been exceeded. Besides the common traces for power, modulation and spectrum, averaged minimum or maximum traces can also be displayed over a user-defined number of packets.

Key Features

• Bluetooth RF tests on all channels
• Full dirty transmitter for BER tests
• Speech codec integrated
• Cost-effective rack version (CBT32)
• Very short cycle time for high production throughput
• Options for Bluetooth® 2.0 + EDR available

Compliance with existing Bluetooth® standards

The CBT is compliant with the Bluetooth Core Specifications Version 1.1. The Bluetooth test mode (Core Spec. Part I:1) is implemented with all commands needed to perform the TX/RX measurements. In addition, the ¸CBT is capable of testing all DUTs that support the new Bluetooth Core Specifications Version 1.2, since the test mode specified in the new version does not include any changes relevant to the CBT.

Transmitter Measurements

• Power
  • Nominal power, peak power, leakage power
  • Power control
  • EDR: Relative Power
• Timing
  • Packet timing error
  • EDR: Guard time
• Spectrum
  • 20 dB bandwidth, adjacent channel power (ACP), frequency range
  • EDR: In-band spurious emissions (gated ACP)
• Modulation
  • Average, maximum and minimum frequency deviation
  • EDR: RMS DEVM, Peak DEVM, 99% DEVM
  • EDR: Differential phase encoding
• Frequency
  • Frequency accuracy (ICFT), frequency drift, maximum drift rate
  • EDR: Carrier frequency stability w_i and w₀

Receiver Measurements

• BER (bit error rate) for basic rate and EDR packets
• Dirty transmitter in line with RF test specification for basic rate and EDR packets
• BER search function: sensitivity level for a predefined BER level
• PER (packet error rate)