Svantek UK

BTC-4148 and BQC-4148 Bluetooth Measurement Interfaces

Listen offers 2 Bluetooth interfaces from Portland Tool & Die, the laboratory-grade BTC-4148 and the low-cost BQC-4148 for production line use. These are ideal for measuring and characterising Bluetooth audio devices including handsets, headsets, speakers, car kits and other devices with Bluetooth audio input or output.

The BTC-4148 and BQC-4148 interface your Bluetooth device to the SoundCheck test system offering full control over all Bluetooth protocol settings and explicit control over the CODEC choice, and transmitter power. This enables devices to be specifically tested under the conditions that they need to operate and enables comparison of characteristics such as frequency response using different compression algorithms or sample rates.



For more information on BTC-4148 and BQC-4148 Bluetooth Measurement Interfaces or to request a quote, contact our team now:

Request a QuoteContact us

BTC-4148 Research Grade Bluetooth Measurement Interface

The BTC-4148 measures both Bluetooth sink devices (e.g. headsets, speakers and car kits) and Bluetooth source devices (e.g. phones and dongles), offering a comprehensive range of features for R&D users. These include:

  • Bluetooth 3.0 compliant RF interface
  • Comprehensive suite of codecs, protocols and other parameters including:
    • A2DP: SBC and APT-X codecs
    • Hands-Free Protocol (HFP) and Headset Protocol (HSP): CVSD and mSBC codecs
  • Full control over Bluetooth protocol settings, codec choice and transmitter power
  • Control via touch-screen panel on the front of the instrument, or directly via SoundCheck
  • Pairing via inquiry/discovery or directly by the device address
  • The host interfaces via USB for both audio and control data and a parallel SPDIF interface for audio data. Audio is always transported in the digital domain to maximize measurement fidelity

BQC-4148 Production Line Bluetooth Interface

The BQC-4148 Bluetooth interface is designed for high volume production line testing of Bluetooth sink devices such as headsets, speakers and car kits. Features include:

  • Rugged and compact, measuring just 30x64x136mm
  • Simple to set up and use with just one USB connection to the computer for power and control
  • Bluetooth 3.0 compliant RF interface
  • Includes codecs required for Bluetooth sink testing including:
    • A2DP: SBC codecs
    • Headset Protocol (HSP): CVSD and mSBC codecs
  • Control over the codec choice, and transmitter power
  • Control via the USB virtual com port using a command-line utility, or from within SoundCheck for simple integration with your test sequences
  • Uses the same internal components as the BTC-4148 to guarantee that measurements made with one can be reproduced with the other
  • Low cost

Comparison of the BTC-4148 Research Grade and the BQC-4148 Production Line Bluetooth Interfaces

BTC-4148 BQC-4148
Test Bluetooth Sink Devices (headsets, speakers and car kits)


Test Bluetooth Source Devices (phones and dongles)


User Interface


Touchscreen/USB (SoundCheck compatible) USB (SoundCheck Compatible)
Digital Audio Interface


Bluetooth RF Interface


N-type SMA
Bluetooth RF


Transmit Power: +4 dBm; Receive Sensitivity: -88 dBm Transmit Power: +4 dBm; Receive Sensitivity: -88 dBm
Bluetooth Specification


Bluetooth 3.0 compliant Bluetooth 3.0 compliant
Bluetooth Profiles


Bluetooth Modes


Source, Sink Source






Voice (CVSD), Wide-Band Voice (mSBC) Voice (CVSD), Wide-Band Voice (mSBC)


Windows and Mac Windows and Mac
Dimensions (H x W x D)


86mm x 271mm x 211mm 30mm x 64mm x 140mm


1.6 kg 0.18 kg


12VDC, 24W power input. Supplied with universal 100-240 VAC / 50 – 60 Hz power supply USB Bus


To download the datasheet click here


Introducing The Renew 1:
A solar only power solution using a 115W solar panel together
with a 38Ah deep cycle battery. Ideal for running systems requiring lower power such as the SV 307 noise monitor under typical environmental conditions.