Futaba
Futaba FDJ-03 Wireless Modem

Manufacture: Futaba Corporation
Model: FDJ-03
Features
8 major features of FDJ-03
- Uses the 1.2GHz band, which can coexist with the 429MHz and 2.4GHz bands
- High-performance receiving circuitry enables wireless communication that is resistant to interference and jamming
- 40 channel frequencies and high speed (14.3kbps) & continuous communication
- Combined with roaming functionality, this multi-stage repeater function eliminates the need for route designation
- Long-distance wireless communication is possible, with a line of sight of 1500m outdoors and 300m indoors (measured by our company: 6km along the coastline)
- Equipped with a communication test function and simple spectrum analyzer function to prevent radio wave troubles
- Equipped with antenna diversity function
- No need for complicated licenses, qualifications or applications
Main uses
- Wireless systems in noisy environments such as factory automation factories, plants, playgrounds, and public facilities
- Wireless systems in environments with many wireless LAN devices and 429MHz band wireless devices, such as offices, FA factories, and hotspots
- Abnormal monitoring of various equipment such as power supplies, cubicles, and vending machines
- Monitoring abnormalities in power receiving equipment installed on the roof of a building
Description
The FDJ-03 is a 1.2 GHz low-power radio modem with an integrated antenna, built around the FDJ-02 module. It features a versatile RS-232C (D-Sub 9-pin) interface and holds technical standards certification, so users can operate it without a license.
Because it operates in the 1.2 GHz band, it coexists smoothly with 429 MHz and 2.4 GHz systems while delivering high-speed communication up to 14.3 kbps. In addition, its lower directivity allows better diffraction around obstacles.
With 40 selectable channels, the modem supports multiple wireless systems in the same area. Moreover, its high-sensitivity receiver and strong interference resistance enable communication up to 1500 m line of sight and 300 m indoors. Built-in commands support flexible 1:1 to 1:N communication, multi-stage repeater functions, and diversity reception, making it ideal for factory and public facility wireless monitoring.
Specifications
| technical standards | ARIB STD-T67 |
|---|---|
| Radio wave format | F1D |
| Radio frequency band | 1216.0125 to 1216.9875 MHz |
| Frequency Channel | 19 channels (continuous transmission) + 19 channels (time-limited) + 2 channels (control channels) |
| Data Modulation Rate | 14.3kbps |
| Antenna Power | 10mW |
| Communication distance | Outdoor visibility: 1,500m (measured by our company: 6,000m) * Indoor visibility: 300m |
| antenna | 2.14dBi (1/2λ whip antenna), transmit/receive diversity function |
| Communication method | Simplex communication method |
| Communication type | 1:1, 1:N |
| Error correction function | Automatic error detection and automatic retransmission function |
| Interface | RS-232C (D-sub 9Pin) |
| Data Rate | 2400 to 19.2 kbps, 31.25 kbps |
| Power supply voltage | DC 4.5 to 27V (supply voltage varies depending on the connector) |
| Current consumption | 150mA or less |
| Operating temperature | -10 to +60°C |
| External dimensions | 270(W) x 134(D) x 23(H)mm (excluding protrusions) |
| weight | Approximately 265g |
*This applies when the antenna is installed 2m above ground. This figure may vary depending on the surrounding environment and installation environment.












