Video receiver SM333R

Buy the SM333R-RI video receiver for a stable analog signal at 3.3 GHz

The SM333R-RI video receiver is a compact FPV module for receiving CVBS video signals in the range of 3.17–3.47 GHz. The model is designed for racing drones, long-distance flights and professional aero systems. The receiver provides low latency and high noise immunity. It is ideal for pilots who need a clear signal over long distances.

The SM333R brand is produced by the company Weide Technology Co., Ltd (also known as STF or Sunflytek). The manufacturer specializes in RF modules for FPV systems and UAV communications. The brand's products are distinguished by high quality and stability. It is tested in real field conditions. Weide Technology offers a wide range of video receivers and transmitters for different frequency ranges.

• Frequency range 3.17–3.47 GHz for flights beyond line of sight.
• Low latency CVBS video for precise control in dynamic flights.
• High sensitivity -95 dBm for a stable signal over long distances.
• Hardware switching of 16 channels (2 banks × 8) for flexible frequency settings.
• Compact dimensions 37x26.3x4.8 mm and weight 5.2 g for easy integration.

How the SM333R-RI video receiver works

The receiver picks up an analog radio signal from the video transmitter (VTX) of the drone in the range of 3.17–3.47 GHz. Built-in FM/PLL demodulator converts it to composite video (CVBS). 1V±0.2V negative video output compatible with most FPV goggles and monitors.

RSSI output (0.66–0.87 V) allows you to monitor signal strength in real time. Channel switching is carried out via TTL logic (S1 for bank, CS1-CS3 for channel). 5V power supply and 420mA consumption make the module economical. The compact design makes it easy to install in drones and ground stations.

Specifications

Model SM333R-RI operates in the frequency range 3170–3470 MHz. Number of channels - 16 (2 banks of 8). Bank A frequencies: 3330–3470 MHz, Bank B: 3170–3310 MHz. Receiver sensitivity is -95 dBm ±5 dBm. Intermediate Frequency (IF) - 480 MHz. Antenna input impedance - 50 Ohm. Video output impedance - 75 ohms. Supply Voltage - 5 VDC ±5%. Current consumption - 420 mA ±30 mA.

RSSI voltage varies from 0.66 to 0.87 V depending on frequency. Operating temperature ranges from -10 to +65°C. Storage temperature - from -30 to +85°C. Module dimensions - 37x26.3x4.8 mm, weight - 5.2 g. Lead pitch - 2.54 mm. Signal-to-noise ratio - ≥38 dB. Differential gain - ≤±5%, differential phase - ≤±5°.

The module is compatible with PAL and NTSC analog video systems. It is ideal for FPV drones, CCTV and experimental projects. High sensitivity ensures stable reception even in interference conditions.

• Input voltage: +5 VDC current
• Current consumption: 420 mA ± 30 mA at 5 V
• Operating temperature: -10 to +65 °C
• Storage temperature: -30 to +85 °C
• Operating Humidity: 85%RH

• RF characteristics
• Frequency reception range: 3170–3470 MHz
• Demodulation system: FM/PLL
• Intermediate frequency: 480 MHz
• Antenna Input Impedance: 50 ohms (typical)
• Local oscillator frequency stability: ±200 kHz
• Local oscillator frequency accuracy: ±200 kHz
• Local oscillator control: PLL
• Input LO leakage: -65 dBm
• Receive sensitivity: -95 dBm ± 5 dBm
• Number of channels: 16
• Channel frequencies: A: 3330, 3350, 3370, 3390, 3410, 3430, 3450, 3470 MHz; B: 3170, 3190, 3210, 3230, 3250, 3270, 3290, 3310 MHz

• Video characteristics
• Video output impedance: 75 ohms (typical)
• Video signal level: 1 V ± 0.2 V (p-p, typical)
• Video frequency response: ±5 dB (max) from 50 Hz to 6 MHz
• Differential Gain: ±5% (max)
• Differential phase: ±5° (max)
• -3 dB IF bandwidth: 16.5 MHz
• Signal-to-noise ratio: no less than 38 dB
• RSSI: 22 mV/dBm
• Antenna Input Impedance: 50 ohms (typical)

• Dimensions: 37 mm (L) × 26.3 mm (W) × 4.8 mm (H)
• Weight: approximately 5.2 g