Test & Measurement R&S®CBT/R&S®CBT32 Bluetooth® Tester Fast and comprehensive RF and audio measurements

R&S®CBT/ R&S®CBT32 Bluetooth® Tester At a glance The R&S®CBT/R&S®CBT32 Bluetooth® tester performs fast and comprehensive RF and audio measurements for R & D, production and verification. The R&S®CBT performs Bluetooth® RF tests at extremely high speed. In addition to power, modulation, frequency and BER tests, the R&S®CBT carries out a variety of spectrum measurements without requiring any extra spectrum analyzers. While conventional Bluetooth® testers sequentially measure power, modulation, frequency accuracy and also frequency drift, the R&S®CBT performs all these measurements in a single test...

R&S®CBT/ R&S®CBT32 Bluetooth® Tester Benefits and key features Fast and highly flexible – in the lab, for R & D and production ❙❙ R&S®CBT – the most versatile Bluetooth® tester for troubleshooting in the lab ❙❙ R&S®CBT – the record holder in speed for Bluetooth® tests in production ❙❙ R&S®CBT and R&S®CBT32 – the perfect combination for R & D and production ▷▷ page 4 Basic rate and enhanced data rate (EDR) RF testing ❙❙ Setting up a Bluetooth® test mode connection ❙❙ Power measurements (TX) ❙❙ Timing measurements (TX) ❙❙ Modulation and frequency measurements (TX) ❙❙ Spectrum measurements (TX)...

Fast and highly flexible – in the lab, for R & D and production R&S®CBT – the most versatile Bluetooth® tester for troubleshooting in the lab The high versatility of the R&S®CBT results from the use of a parametric measurement concept, which allows all Bluetooth® signal parameters to be set in virtually any desired combination. The effect of different parameter combinations on results can be seen immediately. For example, most measurements can be performed on single frequencies or in hopping mode using any desired bit patterns and packet types. Traces are output virtually in realtime on the large...

R&S®CBT – the record holder in speed for Bluetooth® tests in production R&S®CBT and R&S®CBT32 – the perfect combination for R & D and production The R&S®CBT uses parallel signal processing and therefore performs Bluetooth® tests in production lines at extremely high speed. While conventional Bluetooth® testers sequentially measure power, modulation, frequency accuracy and frequency drift, the R&S®CBT performs all these measurements in a single test cycle, offering unparalleled speed for Bluetooth® TX measurements. The highly flexible remote control programming makes it easy to adapt measurement...

Basic rate and enhanced data rate (EDR) RF testing Setting up a Bluetooth® test mode connection The R&S®CBT acts as a master in a Bluetooth® piconet, the EUT (equipment under test) as a slave. The R&S®CBT can perform the inquiry procedure for the identification of all Bluetooth® devices within range of the R&S®CBT. The Bluetooth® test mode specification stipulates that the EUT has to be locally enabled for the test mode. After a Bluetooth® link is established, the R&S®CBT sends test control commands to the EUT to switch it to the desired test mode. In the test mode, the R&S®CBT can perform a...

Measurement parameters: i Packet timing: time difference between ideal master receiver slot and detected bit 0 of the received burst; this measurement is displayed on the output power screen i Guard time (EDR): time interval between the end of the last GFSK symbol of the packet header and the beginning of the reference symbol of the synchronization sequence; this measurement is displayed on the relative power Modulation and frequency measurements (TX) Measurement of basic rate packets Measurement parameters: i Frequency accuracy/initial carrier frequency tolerance (ICFT): difference between the...

EDR I/Q constellation diagram and phase difference characteristic The I/Q constellation diagram displays EDR packets in the I/Q plane. Bluetooth® EDR packets use differential modulation (DPSK); the I/Q diagram in the absolute symbol mode therefore does not provide any information as to the decodability of the signal. For this reason, the R&S®CBT also offers a differential display in the I/Q plane (differential symbol mode), where the preceding symbol is used as a reference in each case. This makes is possible to ­ ssess a the signal quality. The phase difference characteristic­shows the phase...

Receiver quality measurements (RX) For RX measurements, the tester's built-in signal genera- tor delivers a selectable bit sequence, which is sent to the EUT, looped back and demodulated and processed by the R&S®CBT. The TX level of the R&S®CBT can be adjusted. When the EDR option is added, the receiver quality mea- surement menu offers EDR packet types (2-DH1, 2-DH3 tion to the basic rate packet types (DH1, DH3, DH5). BER/PER tests Measurement parameters: i Bit error rate (BER): percentage of errored bits returned i Bit errors: number of errored bits returned by the EUT i NAK rate: percentage...

Low energy in-band emissions measurement. Bluetooth Low Energy spectrum R] ^ Statistic Count Lower I Center I Upper I Detector Direct test mode To perform the necessary RF tests, Bluetooth® low energy chips support special direct test modes that can be en- abled via the serial interface of the R&S®CBT/R&S®CBT32. For transmitter measurements, a Bluetooth® chip transmits a defined data packet on a selectable frequency at regu- lar intervals (direct TX mode). The R&S®CBT/R&S®CBT32 measures the RF parameters of the equipment under test For receiver tests, the EUT receives data packets from the R&S®CBT/R&S®CBT32...