WELZEK has officially released new Bluetooth HDT (High Data Throughput) options for its T6290 series wireless testers – KM726 for transmitter measurement and KG726 for waveform generation – precisely tailored to next-generation Bluetooth testing requirements.

This article is compiled from information published by Welzek (Welzek link: https://en.welzek.com/gsdt/108.html)

Bluetooth HDT Overview

Bluetooth continues to evolve rapidly. The Bluetooth SIG is advancing four key areas: ultra-low-latency HID, high-definition lossless audio, High Data Throughput (HDT) and higher frequency bands. HDT raises data rates from 2 Mbps to nearly 8 Mbps, significantly improving wireless performance and stability for lossless audio, industrial data transfer, consumer electronics synchronization and more.

Bluetooth HDT is a major innovation introduced in Bluetooth Core Specification v6.0, greatly boosting LE data transfer with a theoretical rate of up to 7.5 Mbps – 3.75× the traditional LE 2M PHY. Key advantages:

• Advances in performance, energy efficiency and reliability
• Higher-order modulation for faster data rates
• Increased LE capacity

With high speed, low latency and standardization, HDT enhances existing wireless experiences and enables applications previously limited by bandwidth – consumer audio/video (lossless audio, ultra-low-latency gaming peripherals), smart interaction (AR/VR glasses), automotive electronics (in-car audio) and file transfer (tablets, smartphones).

Bluetooth HDT Features

HDT achieves breakthrough performance through coordinated PHY and protocol-layer optimizations, delivering more efficient wireless connectivity for IoT and consumer electronics.

PHY Layer

• Advanced modulation: π/4-QPSK, 8PSK and 16QAM at 2 Msym/s
• Convolutional coding with dynamic puncturing (e.g. 2/3 code rate), balancing speed and stability
• Enhanced 32-bit CRC (vs. traditional 24-bit) for stronger data integrity

Protocol Layer

Three flexible packet formats:

• Short Format – control signaling
• Format 0 – backward compatible with legacy modes
• Format 1 – multi-PDU aggregation and smart block segmentation

Key mechanisms:

• Selective retransmission via TxBlockMap, reducing wasted retransmissions
• Block-level ACK (RxBitmap) and dynamic rate adaptation (Link Quality feedback), adapting intelligently to complex wireless environments

WELZEK Bluetooth HDT Test Solution

From chip design to final deployment, HDT devices face new challenges in hardware design, protocol stack development, test validation and ecosystem compatibility. WELZEK's Bluetooth HDT test solution helps device vendors upgrade their test capabilities quickly. The T6290 series supports HDT testing via software upgrade, providing PHY-layer analysis, multi-rate testing and precise measurement of key parameters such as throughput, BER and EVM.

Rich test scenarios: Covers the full HDT test process for chips, modules and end products – R&D validation, RF conformance certification and production-line testing.

All Bluetooth standards: The T6290 series supports Bluetooth 1.0–6.0, including BR/EDR/LE/CS/HDT.

Simultaneous TX/RX testing: OTA testing, TX testing, RX testing and simultaneous TX/RX testing.

Test Cases

• Power vs. Time
• Nominal Power
• Peak Power
• Payload Length
• EVM
• HDT Control Message
• Frequency Error
• Frequency Drift
• Max Drift Rate
• I/Q Origin Offset
• Spectrum ACP

Meshlink is the exclusive distributor of Welzek in Taiwan. Welzek provides VSA/VSG solutions for production-line testing, covering 4G/5G/WiFi/UWB/GNSS/Bluetooth/LoRa/Zigbee and more. Meshlink offers consulting and equipment distribution services for WiFi, UWB and 4G/5G across production, R&D and certification. For product inquiries, please contact our network experts: support@meshlink.com.tw