[Technical Topics] Introduction to Analog RoF Technology

Explaining the "advantages of analog optical transmission" and the "counter performance of E/O and O/E converters compatible with 10MHz to 3GHz"!

Tamagawa Electronics has developed analog optical transmission devices since the second-generation mobile PDC era as a countermeasure against insensitivity, responding to customer needs. In this column, we introduce the analog RoF technology cultivated by our company over many years. RoF stands for Radio over Fiber, which refers to optical fiber wireless. We convert [electricity to light] using an E/O converter, transmit it via optical fiber, and then convert [light to electricity] using an O/E converter to demodulate the electrical signal. We invite you to read on. [Contents] ■ Introduction ■ Advantages of Analog Optical Transmission ■ High-Reliability Optical Transmission Devices ■ EOC-144/OEC-1041 Counterpart Performance ■ Future Plans *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

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The glass pot lid has a hydrophilic heat-resistant coating, allowing you to check the cooking state without any fogging.

Explosion-proof motors available in stock We will deliver within 7 days to meet your delivery schedule. 【What is an explosion-proof motor?】 In factories and plants, flammable gases and vapors are present. When these mix with air and come into contact with an ignition source, an explosion or fire can occur. This motor is designed with measures to eliminate such ignition sources. 【Available stock models】 ■ Pressure-resistant explosion-proof motors, explosion-proof grade d2G4 - Foot-mounted type, output 0.4 to 3.7 kW, 4 poles - Flange type, output 0.4 to 0.75 kW, 4 poles ■ Increased safety explosion-proof motors, explosion-proof grade eG3 - Foot-mounted type, output 0.2 to 0.75 kW, 2 and 4 poles - Flange type, output 0.2 to 0.75 kW, 2 and 4 poles

As part of the "Hometown Ibara Future Creation Human Resource Development Project," we welcomed local elementary and middle school students to the special summer program "Ibara Job Exploration Tour 2025," a collaboration between the Ibara City Chamber of Commerce and the Corporate Branding Committee. We conducted a presentation that clearly and enjoyably introduced how our technology supports society, allowing the children to learn about the appeal of manufacturing and the significance of working while interacting with actual devices and products. Through this initiative, we hope to deepen our connection with the community and nurture the curiosity of the children who will carry the future. We sincerely thank everyone who participated, as well as all those involved in planning and organizing the event.

We will disclose the interim financial results for the fiscal period ending December 2025.

We would like to inform you that our company has recorded a special loss (executive retirement benefits) for the first half of the fiscal year ending December 2025, as detailed below. Furthermore, the payment of executive retirement benefits was approved at the "51st Annual General Meeting of Shareholders" held on March 28, 2025. 1. Recording of Special Loss In recognition of the long-standing contributions of one retiring director, we have recorded a special loss of 14,045 thousand yen as executive retirement benefits. 2. Impact on Performance The impact of this matter on the performance forecast for the fiscal year ending December 2025 is minimal. End.