Wireless Video Transmitter and Receiver for Hidden Cameras
A customer recently contacted us looking for a high-reliability wireless video transmission solution for a specialized inspection and monitoring project. The request focused heavily on non-line-of-sight (NLOS) 성능, low-frequency operation, encryption security, and portable deployment.
Below is part of the customer’s original inquiry:
“I am looking to purchase a complete, high-reliability wireless video transmission kit for a specialized inspection and monitoring application. This is a private purchase to be shipped directly to my logistics forwarder in Miami, 플로리다.
Please provide pricing and availability for a complete kit consisting of the following modules and engineering requirements:
1. Portable COFDM Transmitter (수량: 1 단위)
- 조정: COFDM (코딩된 직교 주파수 분할 다중화) for NLOS operation.
- Operational Frequency: UHF / Sub-GHz band (Preferably adjustable or fixed within the 300 MHz의 900 MHZ 범위). 노트: Standard 1.2GHz or 2.4GHz modules are not acceptable for this project due to building penetration requirements.
- 대역폭: Narrowband operation support (1.25 / 2.5 / 4 / 8 메가 헤르츠).
- RF 출력 전력: Low-power design suitable for body-worn usage (200mW to 500mW maximum). Must include a low-profile aluminum heat sink.
- 보안: Native hardware encryption (AES-128 또는 AES-256) embedded in the primary transmission stream.
- 전원 공급 장치 & Tactical Control (Critical Requirement): DC connector interface compatible with compact external 12V rechargeable Lithium battery packs. The DC power cable must feature a low-profile, inline tactical toggle/rocker switch (pocket-sized) to allow the operator to physically turn the transmitter ON and OFF instantly. This is mandatory to prevent continuous RF emission and mitigate the risk of detection by RF sweepers.
2. Hidden Pinhole Micro Camera Component (수량: 1 단위)
- 해결: Minimum 1080p (풀 HD) 비디오 출력.
- 폼 팩터: Pinhole lens covertly integrated or adaptable with interchangeable shirt-button caps.
- Lens Calibration (비판적인): Must be a Macro Lens with Manual Close-Range Focus Adjustment. The optics must be laboratory-calibrated to provide crisp, ultra-sharp focus on written text/documents located at a distance of 30cm to 50cm from the camera body.
- 인터페이스: Direct connection (via flat ribbon cable or micro-HDMI) to the COFDM transmitter module.
3. Portable COFDM Receiver (수량: 1 단위)
출력 인터페이스: Must include an HDMI port and an integrated UVC (USB 비디오 수업) output or internal capture card (USB 3.0 인터페이스). This is required to stream real-time video directly into a laptop via USB as a plug-and-play webcam device.”
Tuning: Dual-channel receiver matching the transmitter’s frequency band, featuring Antenna Diversity to prevent signal fading during movement.
The customer specifically requested:
- COFDM modulation for strong NLOS transmission
- UHF/Sub-GHz frequency operation between 300MHz and 900MHz
- Narrow bandwidth support (1.25 / 2.5 / 4 / 8 메가 헤르츠)
- Low-power body-worn transmitter
- AES hardware encryption
- Portable 12V battery operation
- Dual diversity receiver
- HDMI and USB-compatible video output
- Hidden pinhole macro-focus camera support
목차
권장 솔루션: 모델 1726
Based on the customer’s requirements, we recommended our Model 1726 Wireless Video Transmitter and Receiver for Hidden Cameras.
This system is designed for strong diffraction and penetration performance in non-line-of-sight environments such as buildings, urban structures, and obstructed areas.
Excellent NLOS Penetration Performance
모델 1726 uses COFDM modulation technology, which offers excellent anti-interference capability and strong diffraction performance.
Even in non-line-of-sight conditions, the system maintains stable video transmission.
Field test video:
https://youtu.be/LDcn58FvDYk?si=k1wBGHsVydWMDztE
주파수 범위: 300MHz to 860MHz
The customer requested operation in the UHF/Sub-GHz band because lower frequencies provide better wall penetration than standard 1.2GHz or 2.4GHz systems.
우리의 대답:
“Operating frequency can be customized within 300MHz to 860MHz. The default configuration is 600MHz.”
This flexible frequency configuration makes the system suitable for many regional RF environments and customized applications.
Narrowband COFDM Bandwidth Support
The customer required selectable bandwidths including:
- 1.25메가 헤르츠
- 2.5메가 헤르츠
- 4메가 헤르츠
- 8메가 헤르츠
Our recommendation was 4MHz bandwidth because it provides a strong balance between image quality and transmission stability.
While ultra-narrow bandwidth modes such as 1.5MHz can increase transmission robustness, they may significantly reduce video quality.
Adjustable RF Output Power
The customer requested low-power body-worn operation between 200mW and 500mW.
Our standard transmitter ships with 1W output power, but software configuration allows limiting the RF output to 500mW.
This helps reduce heat generation and RF exposure while maintaining stable performance.
Aluminum Housing with Cooling Design
The transmitter enclosure uses an aluminum alloy shell with:
- Heat dissipation vents
- Integrated cooling fan
- Compact portable design
명세서:
- 크기: 105 × 60 × 27 mm
- 무게: 약 140 그램
AES Encryption for Secure Video Transmission
Security was one of the customer’s critical requirements.
모델 1726 supports AES-128 encrypted video transmission to protect sensitive data and prevent unauthorized reception.
우리의 대답:
“AES-128 encryption is supported to provide high-level transmission security and privacy protection.”
12V Battery Power Support
The transmitter operates from a 12V DC input and supports portable rechargeable battery packs.
The customer requested a tactical inline power switch for rapid power control.
While we do not provide customized tactical switch cables, the transmitter can easily integrate with third-party battery and inline switch solutions.
카메라 호환성
The customer requested a hidden pinhole macro-focus camera with document-reading capability.
현재, we do not manufacture covert cameras.
하나, our transmitter supports:
- HDMI 카메라 입력
- CVBS analog camera input
This allows customers to integrate compatible third-party cameras based on their own project requirements.
Dual Diversity COFDM Receiver
The portable receiver includes:
- Dual-antenna diversity reception
- HDMI 출력
- CVBS 출력
- Ethernet video output
Diversity reception significantly improves signal stability during movement and helps reduce fading.
Computer Video Streaming Support
The customer requested direct laptop integration.
Our receiver supports network video streaming through the Ethernet port.
추가적으로:
- USB and TF card interfaces support local recording
- USB does not function as a direct UVC webcam output
For laptop monitoring, Ethernet connection is recommended.
Pricing and Shipping
Quoted pricing for the customer:
- COFDM transmitter and receiver system: USD 1,376
- Shipping to Miami, 플로리다: USD 198
- 우리를. import duty included
더 알아보기
More technical details about the Model 1726 Wireless Video Transmitter and Receiver for Hidden Cameras are available here:
If you require customized frequency options, 암호화된 전송, or long-range wireless video solutions, feel free to contact our engineering team.
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