Divimath Dual Band Analogue VTX (NDAA)

Overview:
The Divimath Dual-Band Analogue VTX is a high-power analogue video transmitter designed for FPV builds where flexible frequency selection and reliable RF performance are important. Its distinctive dual-output design supports both 5.8GHz and 3.3GHz operation, allowing compatible setups to switch between the two frequency bands without changing the VTX.

Unlike conventional analogue transmitters built around the widely used Richwave RTC670x chipset, the Divimath uses a different RF architecture with intelligent power calibration and thermal protection. Its compact, flat design suits a range of quadcopter builds, while the two MMCX RF connectors provide connections for antennas matched to each frequency band. Two MMCX-to-SMA pigtails are included for connecting standard SMA antennas.

The transmitter accepts analogue CVBS video in NTSC or PAL format and supports configuration through its onboard button or a flight controller using TBS SmartAudio or IRC Tramp. The standard configuration is limited to 5.8GHz operation and output power up to 400mW. Additional frequency bands and higher power levels can be unlocked for authorised use where regulations permit. An optional heatsink and fan kit is available for builds with restricted airflow or sustained high-power operation.

Note: The higher power settings and 3.3GHz operation are not enabled in the standard configuration. Check the applicable frequency and power regulations before use. Always connect a suitable antenna to the correct RF output before powering the VTX, and provide adequate cooling.

Features:
- Switchable dual-band architecture: Separate RF outputs support 5.8GHz and 3.3GHz operation, allowing rapid switching between bands when the additional functionality is unlocked.
- Alternative RF design: Does not rely on the Richwave RTC670x chipset used by many conventional analogue VTXs.
- Intelligent power calibration: Temperature compensation helps maintain consistent RF output as operating conditions change.
- Thermal protection: Helps protect the transmitter if temperatures rise excessively, although adequate airflow remains essential.
- Flight-controller configuration: Supports TBS SmartAudio and IRC Tramp for channel and power control through a compatible flight controller.
- Onboard controls: A single button and LED indicators provide access to band, channel and power settings.
- Flexible installation: A slim profile and included MMCX-to-SMA pigtails simplify installation in a variety of FPV frames.
- Optional active cooling: Compatible with a separately available heatsink and fan module for builds requiring additional cooling.
- NDAA-compliant: Manufactured in Thailand.

Specification:
- Model: Divimath Dual-Band Analogue VTX
- Video system: Analogue CVBS
- Supported video formats: NTSC/PAL
- Standard operating band: 5.8GHz
- Additional operating band: 3.3GHz, available after unlocking
- Standard selectable output power: 25mW, 250mW and 400mW
- Additional output power levels: Up to 4W (available after unlocking for authorised use)
- Input voltage: 7–26V
- Camera power output: 5V, up to 0.7A
- RF connectors: 2× MMCX
- Flight-controller protocols: TBS SmartAudio/IRC Tramp
- Dimensions: 37×28×10.8mm
- Weight: 12.3g

Included:
- 1x Divimath Dual-Band Analogue VTX
- Accessories