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，Petite taille，重量轻，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、bande passante sans fil、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，4Siège à pas 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)，4Siège à pas de 1,5 mm，Niveau 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(Données-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。3Siège à pas 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：

Aperçu

le ST220 HD Digital Wireless Image Transmission Transmitter est un compact, high-performance device designed to deliver reliable wireless video transmission for professional applications. By integrating a built-in COFDM modulation module, un H.265/H.264 video encoding board, et un small-size PA power amplifier module, the ST220 achieves stable long-distance video transmission in a rugged, lightweight package.

The transmitter adopts a CNC aluminum alloy housing, ensuring durability, excellent heat dissipation, and lightweight design suitable for airborne applications. Avec le soutien de haute définition (HD) and standard-definition (SD) video inputs, configurable transmission parameters, and multiple frequency bands, the ST220 offers a flexible solution for drone operations, field broadcasting, surveillance, 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 50–130 ms for critical low-delay applications or maintained at 200–300 ms in high-compression modes for bandwidth optimization.

Key Features

• Modulation COFDM: Ensures robust, stable transmission in both line-of-sight (LA) et hors ligne de vue (NLOS) environnements.
• Encodage vidéo: Prise en charge H.265 (HEVC) ou H.264 (AVC) codage, with default transmission up to 1080P/I @ 60 fps.
• Le chiffrement: Intégré Cryptage AES-256 guarantees secure video and data links.
• Entrée vidéo flexible: 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.
• Transparent Data Transmission: One-way transparent serial data channel (UART), configurable for TTL 3,3 V 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: Sélectionnable 1 W (30 dBm) ou 2.5 W (34 dBm) RF output for extended range.
• Prise en charge audio: Embedded HDMI audio or analog stereo audio input (Mic/Line-in selectable).
• Conception robuste: CNC-machined aluminum shell provides heat dissipation, durabilité, and compactness.
• Compact & Léger: Taille 104.5 × 50 × 27 mm, weight less than 140 g, making it suitable for drone payloads.
• Configurable Parameters: Modulation settings (bandwidth, coding rate, constellation), fréquence de travail, and FEC ratios are fully adjustable via configuration tools.
• Low Latency Modes: When paired with compatible receivers, latency can be as low as 50 MS, suitable for FPV, drone piloting, or real-time monitoring.

Spécifications techniques

Wireless Modulation & Transmission

• Modulation: COFDM
• Bande passante: Réglable de 1 MHz en 8 MHz
• Constellation: QPSK, 16QAM, 64QAM
• FEC (Correction d'erreur directe): 1/2, 2/3, 3/4, 5/6, 7/8
• Intervalle de Garde: 1/32, 1/16, 1/8, 1/4
• Configurable coding ratio: 2K

Fréquence de travail

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

Puissance de transmission

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

Vidéo & Traitement audio

• Entrées vidéo: HDMI (HD) et CVBS analog (SD)
• Supported Formats:
  • 1080P/I @ 60/50 fps
  • 720P@ 60/50 fps
  • COPAIN (720×576 @ 50i)
  • NTSC (720×480 @ 60i)
• Encodage vidéo: H.265 / H.264
• Entrée audio: HDMI embedded or analog audio (Mic-in/Line-in selectable)
• Format audio: CAA, 16-bit stereo

Interfaces

• Entrée HDMI: Standard HDMI port
• SD Video Input: 4-épingle, 1.5 mm pitch connector
• Transparent Data UART: 3-épingle, TTL 3,3 V (défaut), optional RS232
• Configuration Port: 4-épingle, TTL 3,3 V, compatible with parameter panel or PC connection
• Entrée d'alimentation: Connecteur XT30PW-M (C.C 12 V, 11–13V range)
• Antenne: Connecteur SMA (male, inner pin)

Indicateurs

• LED d'alimentation: Rouge, always on when powered
• LED de liaison: Vert, blinks during wireless transmission activity

Pouvoir & Consommation

• Tension d'alimentation: C.C 12 V (11–13V)
• Consommation:
  • ≤15 W @ 1 Sortie RF
  • ≤23 W @ 2.5 Sortie RF

Physique

• Taille: 104.5 × 50 × 27 mm (excluding connectors and mounting points)
• Poids: <140 g

Performance with Receivers

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

Applications

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

• Industriel & Commercial UAVs: Long-distance wireless video backhaul for drones in mapping, inspection, and surveying.
• Diffuser & Médias: Wireless camera links for live events, sportif, and news gathering.
• Sécurité & Law Enforcement: Mobile video transmission for surveillance vehicles, field operations, or public safety drones.
• Chercher & Rescue Operations: Reliable video feeds in disaster zones or remote areas.
• Défense & Reconnaissance: Tactical UAV or ground unit video transmission with secure AES-256 encryption.

Configurations facultatives

• Bandes de fréquences: Customizable bands from 200–860 MHz.
• Port de données: Configurable as TTL (défaut) or RS232.
• Video Input Priority: HDMI ou AV (factory-configurable).
• Dual-Video Input Mode: Optional dual-input encoding and transmission.
• Puissance de transmission: 1 W (faible puissance) ou 2.5 W (haute puissance).
• Compatibilité du récepteur: Compatible with SR110, SR200, SR300 models depending on latency and resolution needs.