The SJ-TC403A is a long-range 2.7–7 GHz imaging transmission system reaching 25 km with 1080p60 video, dual (visible + thermal) cameras, CNC aluminum VTX and an active-cooled ground receiver.
The SJ-TC403A imaging transmission system is built for extended-range drone operations, transmitting video and imaging data over 25 km or more in the 2.7–7 GHz band with a 5 MHz channel bandwidth. The VTX uses a high-strength CNC aluminum alloy housing with a built-in micro turbo fan for active cooling, supporting stable high-power transmission (max 33 dBm EIRP, region-limited to FCC/CE/SRRC/MIC levels) with integrated over-temperature protection for long ground configuration sessions. It outputs 1080p60 visible-light video and 640×512@50 fps infrared video simultaneously, with canvas-mode OSD refreshing three times per second. The RBox ground receiver provides HDMI and USB-C PD display outputs, USB 3.2, UART expansion and TF-card recording up to 1 TB. The kit includes a 1/1.8″ 2 MP camera (160° FOV) and a 640×480 thermal camera, plus LHCP antennas (3 dBi air unit, 14 dBi ground unit). Weighing ≤30 g in the air and supporting Betaflight/INAV OSD, it serves FPV flights, racing, outdoor entertainment and professional aerial photography.
Key specifications: System composition: VTX + Rbox + V-camera + T-camera + antennas -; Communication frequency: 2.7–7 GHz; Channel bandwidth: 5 MHz; Transmission distance: ≥25 km; TX power (EIRP): Max 33 dBm; FCC <30; CE <14; SRRC <20; MIC <25 dBm; Video resolution: Visible 1080P@60FPS; infrared 640×512@50FPS -.
Specifications
| Parameter | Value | Unit |
|---|---|---|
| System composition | VTX + Rbox + V-camera + T-camera + antennas | – |
| Communication frequency | 2.7–7 | GHz |
| Channel bandwidth | 5 | MHz |
| Transmission distance | ≥25 | km |
| TX power (EIRP) | Max 33 dBm; FCC <30; CE <14; SRRC <20; MIC <25 | dBm |
| Video resolution | Visible 1080P@60FPS; infrared 640×512@50FPS | – |
| VTX dimensions / weight | 34×34×18 mm; ≤30 g | – |
| VTX power input | 11.1–40 | V |
| Frequency points | 36 | – |
| OSD | Canvas mode, update 3 times/s; Betaflight & INAV support | – |
| Rbox power input | 9–30 V, 2 A | – |
| Rbox interfaces | HDMI, USB 3.2 Type-C (PD display), USB 2.0 debug, UART (3.3 V TTL) | – |
| Rbox storage | TF card up to 1 | TB |
| V-camera | 1/1.8″ 2MP, 1080p60/720p60, FOV 160°, F2.2, ≤15 g, 19×19×24 mm | – |
| T-camera | Thermal 640×480@25FPS, FOV 72°, ≤30 g | – |
| VTX antenna | LHCP, 3 dBi, IPEX-1, ≤15 g | – |
| Rbox antenna | LHCP, 14 dBi, SMA-J, ≤500 g | – |
| Operating temperature | −20 to +60 | °C |
All specifications are taken from the manufacturer’s current datasheet.
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