R&S CBT32 Bluetooth Tester


CBT/CBT32 Bluetooth® Testers


Fast and comprehensive RF and audio measurements for development, production, and verification


The CBT Bluetooth® testers perform 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 tolerances for each measured value, or to stop a measurement sequence after a certain number of measurements or when a tolerance has been exceeded. In addition to the common traces for power, modulation, and spectrum, averaged minimum or maximum traces can be displayed over a user- defined number of packets.


Features & Benefits

  • Transmitter measurements
    • Power
    • Nominal power, peak power, leakage power
    • Power control
    • EDR: relative Power
    • EDR: Enhanced power control
    • BLE: Nominal power, peak power, power difference, leakage 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)
    • BLE: in-band emissions
    • Modulation
    • Average, maximum and minimum frequency deviation
    • EDR: RMS DEVM, Peak DEVM, 99% DEVM
    • EDR: differential phase encoding
    • EDR: I/Q constellation diagram
    • EDR: phase difference characteristic
    • BLE: Average, maximum and minimum frequency deviation
    • Frequency
    • Frequency accuracy (ICFT), frequency drift, maximum drift rate
    • EDR: carrier frequency stability ωi and ω0
    • BLE: Frequency accuracy (ICFT), frequency offset, frequency drift, maximum drift rate, initial frequency drift


  • Receiver measurements
    • Bit error rate (BER) and Packet error rate (PER) for basic rate and EDR packets
    • Packet error rate (PER) for BLE packets
    • Dirty transmitter in line with RF test specifications for basic rate, EDR and BLE packets
    • BER search function: sensitivity level for a predefined BER level (basic rate and EDR)
    • NAK rate (basic rate and EDR)


  • Bluetooth® RF test cases

The R&S®CBT and R&S®CBT32 can be used for evaluating the following Bluetooth® test purposes as described in the Bluetooth® RF test specifications:

Basic Rate and Enhanced data rate:

  • TRM/CA/01/C (output power)
  • TRM/CA/03/C (power control)
  • TRM/CA/04/C (TX output spectrum - frequency range)
  • TRM/CA/05/C (TX output spectrum -20 dB bandwidth)
  • TRM/CA/06/C (TX output spectrum -adjacent channel power)
  • TRM/CA/07/C (modulation characteristics)
  • TRM/CA/08/C (initial carrier frequency tolerance)
  • TRM/CA/09/C (carrier frequency drift)
  • TRM/CA/10/C (EDR relative transmit power)
  • TRM/CA/11/C (EDR carrier frequency stability and modulation accuracy)
  • TRM/CA/12/C (EDR differential phase encoding)
  • TRM/CA/13/C (EDR in-band spurious emissions)
  • TRM/CA/14/C (Enhanced power control)
  • RCV/CA/01/C (sensitivity – single-slot packets)
  • RCV/CA/02/C (sensitivity – multi-slot packets)
  • RCV/CA/06/C (maximum input level)
  • RCV/CA/07/C (EDR sensitivity)
  • RCV/CA/08/C (EDR BER floor performance)
  • RCV/CA/10/C (EDR maximum input level)

Low Energy:

  • TRM-LE/CA/01/C (Output power at NOC)
  • TRM-LE/CA/02/C (Output power at EOC)
  • TRM-LE/CA/03/C (in-band emissions at NOC)
  • TRM-LE/CA/04/C (In-band emissions at EOC)
  • TRM-LE/CA/05/C (Modulation characteristics)
  • TRM-LE/CA/06/C (Carrier frequency offset and drift at NOC)
  • TRM-LE/CA/07/C (Carrier frequency offset and drift at EOC)
  • RCV-LE/CA/01/C (Receiver sensitivity at NOC)
  • RCV-LE/CA/02/C (Receiver sensitivity at EOC)
  • RCV-LE/CA/06/C (Maximum input signal level)
  • RCV-LE/CA/07/C (PER Report Integrity)


  • Audio functionality
    • Dual-channel audio generator and analyzer (R&S®CBT-B41)
      This option is used to measure the audio characteristics of Bluetooth® DUTs. It adds four more connectors to the R&S®CBT's front panel. The audio signals are routed via internal audio switches either to the connectors for external equipment or to the internal Bluetooth® speech codec. Various test scenarios can be implemented.


The R&S®CBT's built-in Bluetooth® audio codec supports CVSD as well as A-law and μ-law coding. The following audio options are available for both the R&S®CBT and the R&S®CBT32 to enable extensive audio testing of Bluetooth® devices:

  • Digital audio interface (R&S®CBT-B42)
  • Support of handsfree and headset profiles (R&S®CBT-K54)
  • Support of A2DP stereo profile and SBC codec (R&S®CBT-K52)


  • R&S®CBTGo software for automatic testing

R&S®CBTGo is a PC software application for remote control of the R&S®CBT and R&S®CBT32. The software can be downloaded free-of-charge from the Rohde & Schwarz website. Using R&S®CBTGo, you can conveniently create any desired test sequences by configuring and combining selectable test modules. The software generates measurement reports at the press of a button. Reports can be stored in various formats. R&S®CBTGo offers a number of sample sequences, e.g. for automatically performing the various Bluetooth® RF test cases. The software allows a large number of graphical elements to be integrated into the measurement report and is thus a valuable tool in R&D and product verification.