古野電気 List of Products and Services

Here are some examples of the utilization of the "train radio" system. The train radio system provided by Dainichi Electronics features functions such as "transmission frequency synchronization" and "audio delay phase synchronization," which significantly reduce inspection and maintenance costs while achieving high-quality wireless communication. A major characteristic of this system is the use of GPS/GNSS. By utilizing our multi-GNSS reference frequency generator GF-8702 for time and timing synchronization, the frequency is automatically adjusted, ensuring a consistently stable transmission frequency. 【Related Products】 ■ Multi-GNSS Reference Frequency Generator GF-8801/02/03 ■ Multi-GNSS Reference Frequency Generator GF-8804/05 *For more details, please refer to the related link page or feel free to contact us.

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We will introduce a case study on "Time Synchronization in Outdoor Environments." Associate Professor Minseok Kim of Niigata University (interviewed in March 2022) is engaged in research on radio wave propagation measurement in outdoor mobile communication environments. In this instance, during field tests of a 6G mobile base station and mobile devices under study, the field time sync generator "TB-1" was adopted to obtain accurate 1-second pulses synchronized to UTC at two distant locations. After confirming synchronization between rubidium oscillators in the laboratory, a field evaluation was conducted in the area around Yokohama Kannai Station. This made it possible to measure radio wave propagation characteristics in practical usage environments. [Case Study] ■ Challenges - The required synchronization accuracy could not be achieved because the rubidium oscillators were independent. - Cesium oscillators were also considered, but they were expensive and difficult to transport. ■ Product Introduced: Field Time Sync Generator "TB-1" *For more details, please refer to the related link page or feel free to contact us.

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I would like to introduce the necessary GPS (GNSS) technology for the securities trading market. One day, Mr. Gilbert, an American who engages in day trading and scalping trades, which involve repeatedly buying and selling securities multiple times a day, decided to investigate the communication time loss at his brokerage firm. To his surprise, he found that the communication conditions were managed to the extent that high-speed and frequent trading services could be utilized, down to the millisecond level. "Trading at the millisecond level is truly an amazing world," he thought. As he continued to research the management of communication conditions, Mr. Gilbert discovered an intriguing article. It stated that GPS (GNSS) is used to detect time loss at the millisecond level and even below (microseconds, nanoseconds). By reading these articles, Mr. Gilbert felt reassured that he was able to trade in an environment that allows for safe and accurate transactions. *For more details, please refer to the related link page or feel free to contact us.*

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We will introduce examples of the utilization of "Smart Grid and GPS (GNSS) Timing Technology." Today, it is widely used in social infrastructure such as broadcasting stations for terrestrial digital broadcasting and mobile phone base stations, as well as various wireless communication systems and grandmaster clocks, all of which require accurate time, reference frequency, and timing synchronization. Furuno's multi-GNSS reference frequency generator is also adopted in various social infrastructure facilities mentioned above. By simultaneously receiving multiple GNSS signals, it can obtain high-precision timing information more stably. 【Case Details】 <Multi-GNSS Reference Frequency Generator> ■ Achieves high performance with a time pulse accuracy of 1.5μs/24 hours (GF-8805) ■ Can obtain high-precision timing information more stably *For more details, please refer to the related link page or feel free to contact us.

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It covers GPS (L1), GLONASS (L1), and Galileo (E1), and is compatible not only with GPS receivers but also with multi-GNSS receivers. It has reliable lightning surge performance that meets IEC61000-4-5 and JIS C 5381-21 standards. 【Recommended Products】 It can be used in combination with all of our GPS/GNSS receivers.

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When using a GNSS receiver at a fixed point, such as for timing or time synchronization applications, please use a dedicated mounting accessory. Securely attach the antenna to the structure.

• Other machine elements

The GPA series is a GNSS antenna designed for time synchronization intended for installation on buildings. The GPA-014 is designed to withstand harsh outdoor environments such as rain, wind, sunlight, and temperature changes, and it is also equipped with a radome to prevent signal attenuation due to snow accumulation. [Recommended Products] GPS Timing Module (GT-80/GT-8777)

• antenna

The GPA series is a GNSS antenna designed for timing and time synchronization intended for installation on buildings. The GPA-017 is a compact and lightweight package designed to withstand harsh outdoor environments such as rain, wind, sunlight, and temperature changes.

• antenna

The AU series is a GNSS antenna designed for installation on buildings for time synchronization. It excels in weather resistance and interference rejection characteristics, and has the ability to filter out radio waves that can adversely affect GNSS receivers (such as broadcast and satellite communication signals). The AU-117 is equipped with a radome to prevent signal attenuation caused by snow accumulation. 【Recommended Products】 Rb/GPS reference frequency generators (GF-8048/GF-8612/GF-8613/GF-8648)

• antenna

The AU series is a GNSS antenna designed for installation on buildings for time synchronization. It excels in weather resistance and anti-jamming characteristics, and has the ability to filter out radio waves that can adversely affect GNSS receivers (such as broadcasting and satellite communication signals). The AU-217 supports multi-constellation and can receive signals from the American GPS, Russian GLONASS, European Galileo, and Japanese QZSS. When combined with GNSS receivers compatible with these satellite systems, it is suitable for use in urban areas with poor sky visibility. 【Recommended Products】 GNSS Timing Module (GT-87/GT-88) GNSS Reference Frequency Generator (GF-87/GF-88 Series)

• antenna

The TB-1 is a GNSS reference signal generator designed for maintenance sites of wireless systems and research and development environments. It is equipped with a high-precision OCXO. Despite its palm-sized compact design, it meets the needs for time synchronization and frequency measurement in digital broadcasting, 5G, and V2X development with a 1 pulse per second (1PPS) synchronized to UTC and an accurate 10MHz output.

• Time-frequency measurements

The Furuno GF-88 series is a fully functional multi-GNSS reference frequency oscillator (GNSSDO*) that includes a multi-GNSS receiver, a high-precision crystal oscillator (OCXO), an antenna detection circuit, and a low-loss regulator (LDO) all within a compact pin header module. It outputs a 1-second pulse synchronized to Coordinated Universal Time and an accurate frequency. The GF-8805, equipped with a high-precision OCXO, achieves frequency stability equivalent to that of atomic oscillators with a 1PPS accuracy of less than ±1.5μs (over 24 hours), not only during GNSS signal reception but even in a holdover state when signals cannot be received. The GF-8804, which offers excellent cost performance in the same form factor, is also available. By choosing the optimal product from these two options, designers can significantly save time and costs. *GNSSDO: GNSS disciplined oscillator

• Time-frequency measurements
• High frequency/microwave parts

The Furuno GF-88 series is a fully functional multi-GNSS reference frequency oscillator (GNSSDO*) equipped with a multi-GNSS receiver, a high-precision crystal oscillator (OCXO) or a temperature-compensated crystal oscillator (TCXO), an antenna detection circuit, and a low-loss regulator (LDO) all within a compact pin header module. It outputs a 1-second pulse synchronized to Coordinated Universal Time and provides an accurate frequency. The GF-8802/8803, which features a super-compact OCXO, includes holdover functionality in a module size of 34mm x 27mm. In the unlikely event that signals from GNSS satellites cannot be received, it maintains performance of 10μs/24 hours (GF-8803). The low-profile GF-8801, equipped with a TCXO, is also available in the same form factor. By choosing the optimal product from these three options, designers can significantly save time and costs. *GNSSDO: GNSS disciplined oscillator

• Time-frequency measurements
• High frequency/microwave parts

The GT-88 is a multi-GNSS timing module that outputs high-precision and high-stability time pulses (1PPS). Furuno's technological innovation has achieved "1PPS accuracy of less than 4.5ns (1σ)," which was considered difficult with single-band systems. It provides accurate and stable timing performance without the need for expensive multi-band receivers or antennas. Equipped with the multipath-resistant technology "Dynamic Satellite Selection," based on an algorithm devised by NTT, it allows for antenna installation in urban areas and near windows. It has features to counteract typical obstacles to GNSS time synchronization and demonstrates high environmental resistance.

• Time-frequency measurements
• High frequency/microwave parts

The GT-87 is a multi-GNSS module for timekeeping and timing synchronization that achieves the world's highest level of satellite capture. It outputs a high-precision time pulse (1PPS) synchronized to UTC (Coordinated Universal Time) and a coherent clock (such as 10MHz) with the time pulse. With its multi-GNSS capability and high noise resilience, it excels in environments that have been considered harsh for standalone GPS, such as urban canyons.

• Time-frequency measurements
• High frequency/microwave parts

The GPS frequency generator "GF-8048" is an ultra-high stability and ultra-high quality rubidium frequency generator that utilizes the highly accurate time provided by GPS. By locking the built-in rubidium oscillator to GPS, it can generate a high-precision reference frequency. It can obtain stable frequencies and accurate time worldwide, even in locations with poor satellite reception, as long as at least one tracking satellite is functional. For more details, please download the catalog.

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