Technical Scheme List

In the broadcasting industry, testing instruments are key tools for ensuring signal quality and equipment performance. More than two decades ago, the FMAB launched by R&S (Rohde & Schwarz) was an industry benchmark in the field of broadcast transmitter testing. With its excellent performance and reliability, FMAB quickly became the preferred equipment for broadcast engineers. However, with technological advancements and changes in market demand, FMAB has gradually withdrawn from the historical stage. Today, the RWC2500A Plus, jointly launched by Doewe Technology and RWC, is inheriting the mission of FMAB with a brand-new posture and becoming a new benchmark in the field of broadcast testing.

With the rapid development of science and technology, 4K ultra-high-definition TVs have become an important part of modern home entertainment. To ensure that viewers can enjoy high-quality 4K TV programs, it is particularly important to conduct quality testing on 4K cable digital TV programs. This article refers to Technical Quality Requirements and Measurement Methods for Cable Digital Television* issued by the State Administration of Press, Publication, Radio, Film and Television on August 18, 2023, which specifies the audio and video formats of 4K cable digital television systems, as well as quality requirements and measurement methods for transmission channels, code streams, subjective evaluation, etc. Based on this and combined with the actual measurement of 4K cable TV program quality, this article presents a set of specific and relatively complete measurement methods.

This solution is a targeted offering by Beijing Doewe Technology Co., Ltd. for testing in-vehicle audio components that use the A²B protocol, encompassing both A²B microphone testing solutions and A²B speaker testing solutions. As automobiles adopt new infotainment technologies, advanced driver assistance systems (such as cameras, microwave radars, and lidar), and a variety of sensors to measure different data (including stability, speed, and acceleration), the number of electronic systems inside vehicles has increased, and their complexity has reached a new level, posing significant challenges to communication buses. Various buses used by many different subsystems involve highly complex (and costly) cables. For automotive applications, size and weight have become new challenges because meeting new environmental regulations means the need to develop new systems capable of, for example, reducing CO₂ emissions.

The ASMC-PXIe-8016 series PXIe memory cards launched by Doewe Technology adopt P2P technology and are based on the PCIe x8 bus. With a storage capacity of up to 16TB and read-write speeds exceeding 6GB/s, they also feature slot identification, energy monitoring, high-durability storage media, and anti-interference design. These cards can maintain the reliability of data transmission in harsh environments and have been widely applied in high-end fields such as automobile manufacturing. By virtue of this, Doewe Technology provides users with high-performance and high-reliability storage solutions, driving the advancement of data acquisition technology.

This article is one of a series introducing the newly issued SMPTE standards for basic media streams over IP networks, focusing on video transmission, particularly the packet format that will replace uncompressed SDI signals.

This article presents a professional broadband RF recording and playback solution using the broadband RF recording and playback system MP7600 Plus and its supporting software BroadCMS. The broadband RF recording and playback system MP7600 Plus is a professional RF recording and playback equipment system, which is an ideal tool for RF engineers in field signal testing and collection. A single unit features real-time RF signal analysis, recording, and playback functions, with a maximum real-time RF signal analysis, recording, and playback bandwidth of 100MHz, and supports adjustable bandwidth from 2MHz to 100MHz. It also has spectrum analysis and power measurement functions, which can meet different application needs. The customized software can support timing settings, automatic switching, starting, and stopping of recording for signals in different frequency bands within the working frequency range. It allows real-time output while supporting signal analysis and recording, and can play cyclically during signal playback. Thanks to the excellent RF performance and strong functional expandability of the broadband RF recording and playback system MP7600 Plus, this system will also develop more application scenarios in future engineering projects.

Roadside Units (RSUs) and On-Board Units (OBUs) are important components in intelligent transportation systems. An RSU is a device installed on the roadside in the ETC system, which uses short-range communication technology to communicate with the OBU installed in the vehicle. The OBU is a small device mounted inside the vehicle that stores basic vehicle information and can interact with the RSU to enable automatic toll deduction without stopping.To ensure the stable operation and efficient performance of the ETC system, it is necessary to test RSU and OBU products using professional testing solutions. This article will introduce a testing solution provided by Beijing Duwei Technology Co., Ltd. The entire system consists of core control software ETC Runsys and hardware equipment, which can meet the relevant testing requirements for RSUs and OBUs.

Based on a high-performance data acquisition system, Doewe Technology provides a testing solution for in-vehicle A2B acoustic acquisition and analysis. By collecting, analyzing, and monitoring the audio data of the in-vehicle A2B system, it can comprehensively evaluate its stability, audio quality, and system response capability in actual use. This provides solid data support for subsequent performance optimization, problem diagnosis, and application expansion.

This article elaborates on the basic concepts of sound pressure-related characteristic quantities—auditory threshold sound pressure, instantaneous sound pressure, peak sound pressure, and effective sound pressure, as well as the calculation of sound pressure level.

Due to the lack of DAB signal coverage in China, the R&D and verification of in-vehicle DAB functions face challenges. This article introduces the verification methodology: R&D testing requires controllability of radio frequency signals, physical layers, channel parameters, etc., and RWC2010C can meet these needs with support for multiple modulations and baseband multiplexing; QA or vehicle-wide verification focuses on user experience, and RFCS can collect reflected radio frequency signals with high precision; HEXYLON can collect operator ETI code streams and detect radio frequency indicators. The combination of these three "magic tools" (RWC2010C, RFCS, HEXYLON) enables tests such as radio frequency indicator detection, code stream collection and modulation, which helps verify the in-vehicle DAB functions and enhance product competitiveness.

This solution is a Bluetooth radio frequency conformance testing scheme launched by Beijing Doewe Technology Co., Ltd. in accordance with Bluetooth radio frequency specifications. It supports Classic Bluetooth (BR/EDR) and Bluetooth Low Energy (BLE) technologies, as well as the Bluetooth Core Specification up to version 5.2 (with continuous updates). With the upgrading and iteration of Bluetooth technology, more and more products have begun to use Bluetooth as a carrier for information transmission, and its application scenarios have been continuously expanding, including consumer electronics, automotive electronics, smart home appliances, industry, medical care and other multiple fields. According to the requirements of the Bluetooth Special Interest Group (SIG), any Bluetooth device must pass Bluetooth protocol testing and certification before it can enter the market. Therefore, in the process of research and development and production, it is crucial to conduct radio frequency conformance testing on Bluetooth devices to ensure that their wireless indicators meet the requirements of Bluetooth radio frequency specifications.

Doewe ASMCPXIe7024 Gigabit Network Card integrates 4 1GbE ports, features on-board FPGA acceleration with a forwarding delay of less than 5μs, supports domestic encryption and multiple systems, and can be combined with P2P memory cards for lossless packet recording. Doewe builds a DAQ ecosystem centered on PXIe chassis, covering various types of acquisition cards and high-speed memory cards to achieve multi-physical quantity synchronization and cover multiple scenarios. GigE × PXIe is an ideal combination, and Doewe's solution facilitates data closed-loop, bringing an efficient testing experience.

This article elaborates that the PXIe controller developed by Doewe Technology adopts an advanced processor architecture, boasting powerful computing capability and high reliability, and is specifically designed for high-demand testing and data acquisition systems. Our model ASMC_PXIe-1216, equipped with the Intel® Core™ i7-6820EQ processor, supports quad-core and eight-thread parallel processing, with a maximum processing speed of up to 2.8GHz and a cache as large as 8M. Thanks to its excellent computing capability, this controller can efficiently handle complex data acquisition tasks, ensuring the real-time performance and accuracy of data processing. It can also perform tasks stably and efficiently even in highly challenging application scenarios.

Doewe Technology has launched the PXIe A²B acquisition card, which can perform lossless monitoring, injection, or playback of waveforms, and boasts performances such as high sampling rate and high dynamic range. A single card can meet the needs of the entire vehicle's daisy-chain load testing. Moreover, it can be combined with other modules to build a complete "acquisition + analysis + storage" DAQ ecosystem, enabling synchronous acquisition of multiple physical quantities. This transforms in-vehicle audio testing from a "black-box parameter adjustment" approach to a data-driven, quantifiable, and traceable mode.

In the era of CDR/FM digital-analog simulcasting, Beijing Doewe Technology Co., Ltd. provides a series of broadcast signal testing solutions. It can conduct comprehensive testing on various indicators of broadcast signals, whether in terms of transmitter performance, signal reception quality, or signal coverage effect, so as to optimize the listening experience of the audience.