HD digital wireless image transmission transmitter

高清数字无线图传发射机ST220内置编码板、COFDM调制模块、小尺寸PA功率放大模块，整机采用CNC铝合金壳体，Tamanho pequeno，peso leve，传输分辨率高，发射距离远。

• COFDM调制。
• H265/H264视频编码，默认最高支持1080P/I @60fps。
• AES256加密。
• 支持非视距高速移动传输。
• 中心频点、largura de banda sem fio、传输码流等均可配置。

ST220主要技术规格

ST220发射机可配套SR300接收机、SR110接收机、SR200接收机使用。ST220发射机与SR300接收机点对点无线传输H265视频时，视频延迟一般在200~300ms之间(未包含相机自身延迟)。ST220发射机搭配SR110接收机，H264低延时模式传输时，视频延迟一般在50~130ms之间(未包含相机自身延迟)。

ST220发射机接口信号

ST220发射机

AV输入接口：

标清输入接口，4Assento com passo PIN de 1,5 mm，音频支持Mic in或Line in输入(出厂时指定)。可通过配参面板设定PAL或NTSC制式。

CFG接口：

配置串口(Control-uart)，4Assento com passo PIN de 1,5 mm，Nível TTL 3,3 V。其中的5V信号用于对接配参面板时给配参面板供电。

Data接口：

单向透传数据串口(Data-uart)，该串口数据会通过COFDM无线链路单向传输到对应接收机的数据串口上。3Assento com passo PIN de 1,5 mm，默认出货为TTL 3.3V电平，也可在出货时指定设置为标准RS232电平串口。

工作指示灯：

Visão geral

o ST220 HD Digital Wireless Image Transmission Transmitter é um compacto, high-performance device designed to deliver reliable wireless video transmission for professional applications. By integrating a built-in COFDM modulation module, um H.265/H.264 video encoding board, e um small-size PA power amplifier module, the ST220 achieves stable long-distance video transmission in a rugged, pacote leve.

The transmitter adopts a CNC aluminum alloy housing, ensuring durability, excellent heat dissipation, and lightweight design suitable for airborne applications. Com suporte para alta definição (alta definição) and standard-definition (SD) entradas de vídeo, configurable transmission parameters, and multiple frequency bands, the ST220 offers a flexible solution for drone operations, field broadcasting, vigilância, and other wireless video applications.

Paired with receivers such as the SR300, SR110, or SR200, the ST220 enables real-time video transmission with selectable latency modes. Depending on configuration, latency can be reduced to as low as 50–130ms for critical low-delay applications or maintained at 200–300ms in high-compression modes for bandwidth optimization.

Características principais

• Modulação COFDM: Garante robustez, stable transmission in both line-of-sight (LOS) and non-line-of-sight (NLOS) ambientes.
• Codificação de vídeo: Suporta H.265 (HEVC) ou H.264 (AVC) codificação, with default transmission up to 1080P/I @ 60 FPS.
• Encryption: Integrado Criptografia AES-256 guarantees secure video and data links.
• Flexible Video Input: Standard HDMI input for HD signals, and CVBS/analog input for SD video sources. Automatic input detection with HDMI preference, or configurable for AV priority. Optional dual-input encoding available.
• Transmissão Transparente de Dados: One-way transparent serial data channel (UART), configurable for TTL3.3V ou RS232 levels, enabling simultaneous data communication along with video.
• Customizable Frequency: Wide range of selectable frequency bands between 200–860 MHz, with configurable center frequency and fine-tuning step of 1 kHz.
• Transmission Power Options: Selecionável 1 W (30 dBm) ou 2.5 W (34 dBm) RF output for extended range.
• Suporte de áudio: Embedded HDMI audio or analog stereo audio input (Mic/Line-in selectable).
• Design robusto: CNC-machined aluminum shell provides heat dissipation, durabilidade, and compactness.
• Compactar & Leve: Tamanho 104.5 × 50 × 27 milímetros, weight less than 140 g, making it suitable for drone payloads.
• Parâmetros Configuráveis: Configurações de modulação (largura de banda, coding rate, constelação), frequência de trabalho, and FEC ratios are fully adjustable via configuration tools.
• Low Latency Modes: When paired with compatible receivers, latency can be as low as 50 EM, suitable for FPV, drone piloting, ou monitoramento em tempo real.

Especificações Técnicas

Wireless Modulation & Transmissão

• Modulação: COFDM
• Bandwidth: Ajustável de 1 MHz para 8 MHz
• constelação: QPSK, 16QAM, 64QAM
• FEC (Correção de erro de encaminhamento): 1/2, 2/3, 3/4, 5/6, 7/8
• Intervalo de guarda: 1/32, 1/16, 1/8, 1/4
• Configurable coding ratio: 2K

Frequência de trabalho

• Standard Bands:
  • 300–360 MHz
  • 350–400 MHz
  • 450–500 MHz
  • 520–560 MHz
  • 580–620 MHz
  • 680–720 MHz
  • 820–860 MHz
• Personalização: Other frequencies from 200–860 MHz available upon request
• Step size: 1 kHz configurable center frequency

Transmitir energia

• 1 W (30 dBm) ou 2.5 W (34 dBm) selecionável

Vídeo & Processamento de áudio

• Video Inputs: HDMI (alta definição) e CVBS analog (SD)
• Supported Formats:
  • 1080P/I @ 60/50 FPS
  • 720P@ 60/50 FPS
  • AMIGO (720×576 @ 50i)
  • NTSC (720×480 @ 60i)
• Codificação de vídeo: H.265 / H.264
• Entrada de áudio: HDMI embedded or analog audio (Mic-in/Line-in selectable)
• Formato de áudio: AAC, 16-bit stereo

Interfaces

• Entrada HDMI: Standard HDMI port
• SD Video Input: 4-alfinete, 1.5 mm pitch connector
• Transparent Data UART: 3-alfinete, TTL3.3V (padrão), opcional RS232
• Configuration Port: 4-alfinete, TTL3.3V, compatible with parameter panel or PC connection
• Entrada de energia: Conector XT30PW-M (12V CC, 11–13V range)
• Antena: Conector SMA (macho, inner pin)

Indicadores

• LED de energia: Vermelho, always on when powered
• LED de ligação: Verde, blinks during wireless transmission activity

Poder & Consumo

• Tensão de alimentação: 12V CC (11–13V)
• Consumo:
  • ≤15 W @ 1 Saída RF W
  • ≤23 W @ 2.5 Saída RF W

Físico

• Tamanho: 104.5 × 50 × 27 milímetros (excluding connectors and mounting points)
• Peso: <140 g

Performance with Receivers

• ST220 + SR300 Receiver:
  • Point-to-point H.265 transmission
  • Typical latency: 200–300ms (excluding camera delay)
• ST220 + SR110 Receiver:
  • Low-latency H.264 transmission mode
  • Typical latency: 50–130ms (excluding camera delay)
• ST220 + SR200 Receiver:
  • Standard COFDM reception with configurable settings

Aplicações

The ST220 HD digital wireless image transmission transmitter is designed for professional video transmission em ambientes exigentes. Its combination of compact design, high-resolution support, and configurable transmission options make it suitable for:

• Industrial & Commercial UAVs: Long-distance wireless video backhaul for drones in mapping, inspeção, e levantamento.
• Transmissão & Mídia: Wireless camera links for live events, esportes, and news gathering.
• Segurança & Aplicação da lei: Mobile video transmission for surveillance vehicles, operações de campo, or public safety drones.
• Pesquisa & Operações de resgate: Reliable video feeds in disaster zones or remote areas.
• Defesa & Reconhecimento: Tactical UAV or ground unit video transmission with secure AES-256 encryption.

Configurações opcionais

• Bandas de frequência: Customizable bands from 200–860 MHz.
• Porta de dados: Configurable as TTL (padrão) ou RS232.
• Video Input Priority: HDMI ou AV (factory-configurable).
• Dual-Video Input Mode: Optional dual-input encoding and transmission.
• Transmitir energia: 1 W (baixa potência) ou 2.5 W (alta potência).
• Compatibilidade do receptor: Compatible with SR110, SR200, SR300 models depending on latency and resolution needs.