Wireless rf Ethernet Transceiver TDD-COFDM Full Duplex

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Item specifice:

Brand Name: Safe Guard Model Number: SG-TDD20 Modulation: TDD_COFDM, time division duplex mode
RF power: 20W RF bandwidth: 4/8MHz Baud rate: 7200 ~ 921600bps (adjustable)
Correction mechanism: 32bit of CRC, ARQ Encryption: 128bit AES (Optional 256bit AES) Dimension: 210 * 133 * 54mm
Weight: 2.5kg Customization: All features can be changed as your prefer!

Product Description:

Model: SG-TDD20

TDD-COFDM is our new NLOS(non-line of sight) two-way data transmission system and wireless mobile emergency communication private network, which is independent of telecom operators wireless network. Its confidentiality, security, mobile performance that is better than Telecom operators. Also is a fully transparent data encryption transmission emergency security network.

Wireless rf Ethernet Transceiver TDD-COFDM Full Duplex

TDD-COFDM multiplexing technology to channel resources in time through time slot, frequency through a large number of sub carriers to flexibly allocated to multiple users, and in a single frequency to maximize the realization of multi user access. Channel into the AES128bit, and user manually customize key that strength to ensure the data encryption. System occupy relatively narrow-band air frequency(4/8MHz)and strong anti-multipath interference ability to overcome simulation technique and the high-speed mobile data transmission under multipath reflections and nuisance caused by occlusion, then achieved in a complex environment transfer: data packing form, audio and video data, serial asynchronous data, Miniature volume, precision design, lightweight and easy to carry that commonly used in short distance high speed wireless data transmission and on air long distance high speed wireless data transmission purposes.

Wireless rf Ethernet Transceiver TDD-COFDM Full Duplex

Main Features

+ Support protocol PTP &PMD network technology;
+ Support non-line of sight(NLOS) high speed mobile transmission
+ Bit rate can up to 921600bps;
+ AES 128-bit encryption, and also customer manually customize the secret key.
+ Standard RJ45 Ethernet and RS485/RS485/RS422 data interfaces;
+ Built in with small LCD screen that shows the signal working status. 
+ Available frequency: 330-430MHz/ 430-530MHz, or 2.4GHz (option). 

Product Parameters

Physical interface section


Standard RJ-45

RS-232/422/485 data

Two or Three pin terminals

Power supply

DC12V, Four pin terminals

RF connector

SMA female

Main parameters:


TDD_COFDM, time division duplex mode

Working mode

Full duplex

Working frequency

330-430MHz/ 430-530MHz,or 2.4GHz (option). step in 1MHz  

other frequencies can be customized

RF power


RF bandwidth


Correction mechanism

32bit of CRC, ARQ

Transfer Protocol

standard TCP / IP, transparent transmission,serial asynchronous

Data Rate

6.5Mbps ( both video and data occupy the same channel)

Baud rate

7200 ~ 921600bps  (automatically assigned)

Data type

10 / 100Bate-T Ethernet, RS-232, RS-422, RS-485 standard

Audio channel

analog audio intercom interface (non-Open)



Receiving sensitivity


Networking format



128bit AES (Optional 256bit AES)


10 / 100BaseT, Auto-MDI / X, IEEE802.3


Parameter Control

adjustable parameters through the LCD panel

Built-in battery

12000mA or remove

Working time

6 hours

Working temperature

-40 ℃ ~ 85 ℃


210 * 133 * 54mm



About our specification:

1. Advancement: TDD-COFDM channel modulation technology, support fast-moving, ultra-wide band, and fully transparent transmission.
2. Security: private network, private communication transport protocol, sole synchronization code and AES encryption.
3. Flexibility: transparent transmission of IP data channel, supports multi-user access.
4. Scalability: all-digital network, is compatible with all IP data transmission equipment.
5. Technical performance:
- Multi-frequency network base stations, single base station same frequency network, the same frequency network with bidirectional communication, high spectrum efficiency;

- Flexible allocation of channel resources to achieve PTP, PTMT and multipoint-to-multipoint two-way communication;

- Multiple channel bandwidth and a variety of modulation mode function;

- Flexible TDD slot allocation model to meet a single-frequency but multi-user access, not only save the spectrum but also to reduce power consumption;

- Spectrum sensing, perception slot, upstream bandwidth sensing function;

- Strong diffraction ability and anti-multipath capability

- High-sensitivity receiver. When receive level is -110dBm, can still ensure BER<10E-5 and frame error rate <1%. Powerful error correction capability;

- Low PAPR, high power amplifier efficiency, low power consumption;

- Can transmit video audio and etc signals synchronous,high speed.Velocity >600km/h.

- Digital signal processing, a strong system of confidentiality, stability and reliability.

Product Application

As its Miniature volume, precision design, lightweight and easy to carry, suitable used in short distance and long range air high speed wireless video data transmission purposes. Such as UAV, rotorcraft, micro UAV, drone,UGV, unmanned powered parachute, unmanned underwater vehicles boats, Fire-fighting robot,unmanned ship, airship, USV, high iron, EMU, unmanned vehicles, unmanned vehicle and etc..data transmission.

Our Services

One year free warranty;
Three months for free spare parts (Replacement parts will be charged after a year);
24-h technical guidance;
One-stop ODM/OEM solution;
We provide professional system design and construction;
We have over 15 years experience's study, design and manufacturing in wireless microwave transmission area;
We are the professional plant source,so we can provide you high quality in best price.

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Video security monitoring system, entrance and exit control system, explosion-proof security inspection system
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Embedded systems running for more than 10 years, professional use has been completely divorced from the computer system, as far as we are now using mobile phones, set-top boxes, satellite receivers, radar, etc.
Q:District security monitoring center layout?
2, residential surveillance / monitoring center is the whole system of residential security management and the alarming center, should be able to the area of the perimeter protection system, security system, public areas within the family security system for monitoring and management
Q:How to be a security minister
As a security minister, you need to know your responsibilities:I. responsible for the overall management of the company's security and defense;Two, publicize the party's principles, policies, laws and regulations, strictly abide by the law and enforce the law, safeguard the interests of the company, and ensure the normal production and living order of the company;
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A manufacturer or distributor who is required to have independent legal personality and can independently exercise civil rights and bear civil liability.
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The scope of security is relatively large, out of surveillance, there are perimeter alarm, intrusion detection systems
Q:How do security control engineers get it?
Security system integration engineers and security system integration project manager, students complete the course, by the Ministry of information industry electronic Talent Exchange Center awarded the national information security system integration project "engineer" technical certificate and the Ministry of human resources and social security issued by the "653 project" "security system integration engineer security system integration project manager certificate". Certificates can be used as an important basis for professional technicians to employ, hold, grade and promote their positions. Certificate holders will be included in the national information engineer talent pool for enterprises and institutions website inquiries.
Q:Security industry sales channels?Security market in unlimited expansion, security products become hot
In the QQ propaganda security products need to have good writing ability, communication and patience, remain modest and courteous manner, supporting by QQ storage space for all kinds of security products and information security technical implementation plan and other security equipment, so that customers in a better understanding of security products can also understand that other security security equipment company. Communicate with other security colleagues in the QQ group, be polite, make a good impression on others, show your sincerity and honesty, so that your trust will be strengthened. Master all kinds of security related knowledge, in exchange with security counterparts, but also increased their knowledge of security. Say, do not know and cannot customer exchange, are not clear or are not ready to accept either course of words, blowing from base to false, good at helping others, answer the security QQ group inside other security issues raised by the positive peer, it can not only increase their popularity and their security products is also a kind of invisible propaganda. For a long time people will according to the degree of knowledge you master and attitude to judge your product is good or bad, and your status in the QQ group also increased, such as the QQ group who needs the procurement of products will first think of you. Conclusion: to treat others sincerely, they are always happy. Help others is to help yourself, do their own, they will do everything. Second, using e-mail products to promote. Using mail to promote marketing products, not just security industry will do so, other industries will do so, but also a kind of e-commerce marketing.
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3. to the local industrial and commercial application form for industrial and commercial business license.4., then to the tax office tax registration certificate, now seems to have to do the industry code certificate, in the quality inspection bureau.
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As well as the process of working out the original records and files to prevent the wrong coding, the basic requirement is to ensure the uniqueness of the commodity code. The following is some security camera commodity code, in the customs can query.

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