Description
Product Overview
The J-TC403A is the export version of the TC403 drone imaging transmission system, supplied as an air unit and ground box pair with visible-light and infrared camera options. It delivers 1080p60 visible-light video and 640×512@50fps thermal video over a 2.7-7GHz COFDM link with 36 channels. The VTX uses a high-strength CNC aluminium casing and a built-in micro turbo fan with temperature-control protection for stable high-power output. Firmware for both the air unit and ground box can be upgraded independently from a TF card, keeping existing systems current in the field.
Key Features
- 1080p60 visible light and 640×512@50fps infrared video on one 2.7-7GHz link
- Transmission distance of 25km or more with 5MHz channel bandwidth
- Max 33dBm EIRP with regional limits: FCC 30dBm, SRRC 20dBm, MIC 25dBm, CE 14dBm
- 36 preset channels from 2.700GHz to 6.900GHz for interference-free operation
- Dual-mode OSD (canvas mode) updating 3 times per second, Betaflight and INAV compatible
- Air unit weighs 30g or less at 34x34x18mm; independent TF-card firmware upgrade for VTX and RBox
Technical Specifications
| Air Unit (VTX) | |
|---|---|
| Model | J-TC403A / VTX |
| Frequency band | 2.7 ~ 7GHz |
| Channel bandwidth | 5MHz |
| Transmission distance | ≥25km |
| Transmit power (EIRP) | Max 33dBm; FCC <30dBm; CE <14dBm; SRRC <20dBm; MIC <25dBm |
| Interface | JST1.0*4 (Power / USB / UART), 25.5mm x 25.5mm mounting |
| Dimensions | 34mm x 34mm x 18mm |
| Weight | ≤30g |
| SD card slot | Not supported on air unit |
| Video resolution | 1080p60fps / 720p60fps |
| Imaging resolution | Visible light 1080P@60fps / Infrared 640×512@50fps |
| OSD | Canvas mode, updated 3 times per second |
| Number of channels | 36 (2.700 – 6.900GHz) |
| Power input | 11.1 ~ 40V |
| Operating temperature | -20 ~ 60℃ |
| Flight controller | Betaflight, INAV (MSP OSD) |
| Antenna connectors | 4 x IPEX (2.7-5GHz + 5-7GHz) |
| Ground Station (RBox) | |
| Frequency band | 2.7 ~ 7GHz |
| Channel bandwidth | 5MHz |
| SD card slot | Up to 1TB |
| USB 1 (Debug) | USB 2.0, Type-C to USB-A for firmware upgrade, Type-C to Type-C for phone/tablet display |
| USB 2 (Video) | USB 3.2, Type-C to Type-C for PD output display |
| USB 3 (UART) | Serial port, TTL 3.3V |
| Video output | HDMI + Type-C DP |
| Power input | 9 ~ 30V, 2A |
| Fan interface | 5V, 200mA |
| Button interface | Factory keypad (custom keypad supported) |
| Cameras | |
| Visible light sensor | 1/1.8 inch, 2MP, 1080p60, 16:9/4:3, FOV 160°, F2.2, rolling shutter |
| Visible light weight | ≤15g, 19mm x 19mm x 24mm, 0.0001Lux, 140mm coaxial |
| Thermal resolution | 640 x 480 @ 25fps, 16:9/4:3, FOV 72° |
| Thermal weight | ≤30g, 140mm coaxial |
| Antennas | |
| Polarization | LHCP |
| Air antenna | 2.7-5GHz / 5-7GHz, 3dBi, IPEX-1, VSWR <1.5, ≤15g |
| Ground antenna | 2.7-5GHz / 5-7GHz, 14dBi, SMA-J, VSWR ≤2.5, ≤500g |
| Impedance | 50Ω |
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