HD Digital Wireless Image Transmission zender

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• 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、draadloze bandbreedte、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，4PIN 1,5 mm afstandhouder，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(Controle-uart)，4PIN 1,5 mm afstandhouder，TTL 3.3V-niveau。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。3PIN 1,5 mm afstandhouder，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。

Werkend licht：

Overzicht

De ST220 HD Digital Wireless Image Transmission Transmitter is een compact, high-performance device designed to deliver reliable wireless video transmission for professional applications. By integrating a built-in COFDM modulation module, een H.265/H.264 video encoding board, en een klein formaat PA vermogensversterkermodule, 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. Met steun voor hoge definitie (HD) and standard-definition (SD) video-ingangen, configurable transmission parameters, and multiple frequency bands, the ST220 offers a flexible solution for drone operations, field broadcasting, toezicht, 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.

Belangrijkste kenmerken:

• COFDM-modulatie: Zorgt voor robuustheid, stable transmission in both line-of-sight (DE) en niet-zichtlijn (NLOS) omgevingen.
• Videocodering: steunen H.265 (hopen) of H.264 (AVC) codering, with default transmission up to 1080P/I @ 60 fps.
• Encryption: Ingebouwd AES-256-codering guarantees secure video and data links.
• Flexibele video-invoer: 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.
• Transparante gegevensoverdracht: One-way transparent serial data channel (UART), configurable for TTL 3.3V of RS232 niveaus, 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: Selecteerbaar 1 w (30 dBm) of 2.5 w (34 dBm) RF output for extended range.
• Audio -ondersteuning: Embedded HDMI audio or analog stereo audio input (Mic/Line-in selectable).
• Robuust ontwerp: CNC-machined aluminum shell provides heat dissipation, duurzaamheid, and compactness.
• Compact & lichtgewicht: Grootte 104.5 × 50 × 27 mm, weight less than 140 g, making it suitable for drone payloads.
• Configureerbare parameters: Modulatie-instellingen (bandbreedte, coding rate, sterrenbeeld), werkfrequentie, and FEC ratios are fully adjustable via configuration tools.
• Low Latency Modes: When paired with compatible receivers, latency can be as low as 50 Mevrouw, geschikt voor FPV, drone piloting, of realtime monitoring.

Technische specificaties

Wireless Modulation & Overdragen

• Modulatie: COFDM
• bandbreedte: Verstelbaar vanaf 1 MHz tot 8 MHz
• Sterrenbeeld: QPSK, 16QAM, 64QAM
• FEC (Voorwaartse foutcorrectie): 1/2, 2/3, 3/4, 5/6, 7/8
• Guard Interval: 1/32, 1/16, 1/8, 1/4
• Configurable coding ratio: 2K

werken Frequency

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

Zend kracht uit

• 1 w (30 dBm) of 2.5 w (34 dBm) selecteerbaar

Video & Audioverwerking

• Video -ingangen: HDMI (HD) en CVBS analog (SD)
• Supported Formats:
  • 1080P/I @ 60/50 fps
  • 720P @ 60/50 fps
  • VRIEND (720×576 @ 50i)
  • NTSC (720×480 @ 60i)
• Videocodering: H.265 / H.264
• Audio-ingang: HDMI embedded or analog audio (Mic-in/Line-in selectable)
• audio Format: AAC, 16-bit stereo

Interfaces

• HDMI-ingang: Standard HDMI port
• SD Video Input: 4-pin, 1.5 mm pitch connector
• Transparent Data UART: 3-pin, TTL 3.3V (standaard), Er kan slechts één van de HDMI- en SDI-invoer worden geselecteerd
• Configuration Port: 4-pin, TTL 3.3V, compatible with parameter panel or PC connection
• Stroomaansluiting: Er kan slechts één van de HDMI- en SDI-invoer worden geselecteerd (DC 12V, 11–13V range)
• Antenne: SMA-connector (mannelijk, inner pin)

Indicatoren

• Activatie lampje: Rood, always on when powered
• Link LED: Groen, blinks during wireless transmission activity

macht & Consumptie

• supply Voltage: DC 12V (11–13V)
• Consumptie:
  • ≤15 W @ 1 W RF-uitvoer
  • ≤23 W @ 2.5 W RF-uitvoer

fysiek

• Grootte: 104.5 × 50 × 27 mm (excluding connectors and mounting points)
• Gewicht: <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

toepassingen

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

• Industrieel & Commercial UAVs: Long-distance wireless video backhaul for drones in mapping, inspectie, and surveying.
• Uitzending & Media: Wireless camera links for live events, sport-, and news gathering.
• Veiligheid & Wetshandhaving: Mobile video transmission for surveillance vehicles, veldbewerkingen, or public safety drones.
• Zoeken & Reddingsoperaties: Reliable video feeds in disaster zones or remote areas.
• Verdediging & Verkenning: Tactical UAV or ground unit video transmission with secure AES-256 encryption.

Optionele configuraties

• frequentiebanden: Customizable bands from 200–860 MHz.
• Gegevens poort: Configurable as TTL (standaard) or RS232.
• Video Input Priority: Hdmi of van (factory-configurable).
• Dual-Video Input Mode: Optional dual-input encoding and transmission.
• Zend kracht uit: 1 w (laag vermogen) of 2.5 w (hoog vermogen).
• Compatibiliteit met ontvanger: Compatible with SR110, SR200, SR300 models depending on latency and resolution needs.