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 However, with technological advancements and changes in market demand, FMAB has gradually withdrawn from the historical stage.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 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.

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.

This is the first article in a series that describes some of the key technical features of each part of the new SMPTE ST 2110:2017 standard "Professional Media Over Managed IP Networks".

In the field of audio broadcasting, testing equipment is a key tool for ensuring communication quality, optimizing the performance of broadcast transmitters, and troubleshooting faults. Against this backdrop, the RWC2500A Plus has emerged. It not only inherits the reliable performance of the FMAB but also achieves comprehensive breakthroughs in aspects such as waveform display, operational convenience, and device portability, bringing a brand-new solution to the field of audio broadcast testing.

The G315 Plus portable broadcast testing instrument sets a new standard for broadcast monitoring and evaluation! As a portable broadcast testing device specifically designed for outdoor environments, the G315 Plus integrates numerous advantages such as high sensitivity, a large dynamic range, wide frequency coverage (9kHz to 1800MHz), and high cost-effectiveness.

Doewe Technology has launched the broadcast channel simulator ChnSml-BD, which focuses on solving problems such as inaccurate channel simulation, incomplete coverage of test scenarios, and difficulty in reproducing high-complexity environments encountered in the research and development, testing, and optimization processes of wireless communication systems. With highly flexible parameter configuration and powerful simulation capabilities, ChnSml-BD enables researchers to reproduce various real-world channel conditions in a laboratory environment, thereby effectively evaluating and optimizing the performance of wireless communication systems. This not only significantly shortens the product development cycle but also improves the stability and reliability of the system in practical applications.

This article elaborates on what SDI signals are, their classifications, characteristic advantages, and common application cases.

This article elaborates on the RDS data format, RDS data reception and processing, as well as the application of RDS emergency broadcasting technology.

As two common analog broadcasting modulation technologies, FM frequency modulation broadcasting and AM amplitude modulation broadcasting may indeed seem somewhat primitive today, as communication technology is increasingly developing towards digitalization, networking, and intellectualization. However, FM and AM broadcasting methods still occupy important positions in certain specific fields. For example, in urban areas, in-car broadcasting has a huge audience; in the event of natural disasters or emergencies, analog broadcasting can also provide more stable and reliable communication guarantees. Therefore, testing of FM/AM broadcasting is necessary. As important equipment in radio communication, the performance of FM and AM transmitters directly affects the quality of communication and the effect of receiver demodulation signals. Therefore, testing FM and AM transmitters is an important step to ensure that they can stably provide broadcasting services to users.

This article mainly summarizes some common problems in the measurement process of the modulation degree of AM broadcast transmitters. To ensure the quality and stability of broadcast signals, Doewe Technology has launched a measurement method with RWC2500A Plus as the core equipment, which meets the complete testing requirements of broadcast transmitters in the radio and television industry.

CDR (China Digital Radio), namely China Digital Audio Broadcasting, is a mobile multimedia broadcasting technology with independent intellectual property rights in China, developed under the auspices of the State Administration of Press, Publication, Radio, Film and Television. The portable broadcast tester FMH is specially designed for broadcast signal testing. Its testing architecture, based on world-leading radio frequency basic hardware, ensures the professionalism of FMH. FMH not only supports traditional AM and FM testing and can monitor AM and FM broadcasts, but also can conduct detailed testing on China Digital Audio Broadcasting (CDR) signals.

This article elaborates on the testing methods of radio frequency (RF) recorders and players in various application scenarios, including fault diagnosis of wireless communication and radar systems, spectrum monitoring and management, military exercises and electronic warfare training, navigation satellite signal testing, automotive electronics testing, and testing in complex electromagnetic environments.