Telecoms, Datacoms, Wireless, IoT


433 MHz modem delivers 'transparent' half-duplex wireless link

1 November 2006 Telecoms, Datacoms, Wireless, IoT

Radiometrix says that its 9600 baud TDL2A radio modem module is, for the first time, totally transparent, making it very simple to create a half-duplex link. The five-channel TDL2A effectively replaces a serial cable interface in a multitude of applications where trailing cables are impractical or undesirable, delivering a foolproof, low power, 100 m data link.

Unlike other solutions on the market that require the user to possess a considerable amount of radio expertise to successfully install, the company claims the TDL2A makes no such demands. Combining a sophisticated 433 MHz band five-channel transceiver with a dedicated data communication processor, the module deals with any 9600 baud asynchronous data stream issues without requiring any user intervention or interface, and provides all necessary buffering, packetisation, framing, coding, decoding and reconstitution. Further, the TDL2A does not require any additional software, and even eliminates the need for a transit-enable pin as it constantly monitors the channel for valid data. All the user has to do is add a 5 V power supply and aerial says Radiometrix.

Unlicensed operation is permitted throughout Europe under EN300-220. For multiple radio systems (polled networks) the TDL2A can be set to one of eight unique addresses. Additonally, as the TDL2A modules operate on one of five non-overlapping pre-set frequencies in the 433 MHz band, several modules can be in use simultaneously in the same area without interference.

Housed in an industry-standard 33 x 25 x 7 mm BiM2 footprint case, the TDL2A has a transmit power of only 10 mW. The units feature good RF specifications, including a receiver blocking performance of 84 dB. Receiver sensitivity is


-107 dBm (1%BER), adjacent channel rejection is 65dB at ±320 kHz and spurious emission is less than 65 dBm.

Applications are numerous and varied, but include machine to machine interfaces, industrial control and telemetry, handheld portable terminals, medical equipment and environmental monitoring and control systems.



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Module combines 5G and NTN support
Quectel Wireless Solutions Telecoms, Datacoms, Wireless, IoT
Quectel Wireless Solutions announced the launch of its BG770A-SN ultra-compact 5G-ready satellite communication module, compliant with 3GPP releases 13, 14 and 17.

Read more...
Scalable and secure IoT device onboarding and management
Telecoms, Datacoms, Wireless, IoT
EasyPass is an enhancement within Cambium’s cnMaestro platform, aimed at providing local businesses with secure, efficient, and scalable device management, making it ideal for high-demand environments such as educational institutions, retail spaces, and corporate campuses.

Read more...
3,75 GHz RF inductor
RF Design Passive Components
The ceramic chip wire wound inductor from Coilcraft features a DC resistance of 1 O, a DC current of 175 mA, and a self-resonant frequency of 3,75 GHz.

Read more...
SIMCom’s A7673X series
Otto Wireless Solutions Telecoms, Datacoms, Wireless, IoT
SIMCom’s A7673X series is a Cat 1 bis module that supports LTE-FDD, with a maximum downlink rate of 10 Mbps and an uplink rate of 5 Mbps.

Read more...
Non-terrestrial network module
Altron Arrow Telecoms, Datacoms, Wireless, IoT
Fibocom unveiled its MA510-GL (NTN), a non-terrestrial networks module which is compliant with 3GPP Release 17 standard.

Read more...
Cellular IoT connectivity via satellite
Altron Arrow Telecoms, Datacoms, Wireless, IoT
The Telit Cinterion cellular LPWA module will enable satellite data communication using the NB-IoT protocol, without any special hardware changes required for the integration of the cellular module in the customer application.

Read more...
Wireless module supports up to 600 Mbps
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
Quectel’s FCU865R is a high-performance Wi-Fi 6 and Bluetooth 5.3 LCC package module which can be used for WLAN and Bluetooth connections.

Read more...
Unlocking the future of connectivity
Telecoms, Datacoms, Wireless, IoT
The battle for the 6 GHz spectrum band is heating up in South Africa, mirroring global debates on the allocation of spectrum between Wi-Fi and cellular operators.

Read more...
Quectel wireless module wins accolade
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
The winners of the 2024 IoT Evolution 5G Leadership Award were recently announced, with Quectel walking away with an award for its modules which make 5G features more easily accessible for IoT applications, notably the company’s RG255C-GL.

Read more...
Innovative upgrade process for 2G/3G
Otto Wireless Solutions Telecoms, Datacoms, Wireless, IoT
What is likely to happen during the sunset period for 2G and 3G signals, especially on the back of already near-obsolescence of 2G network equipment, is for the availability of the connectivity mediums to begin to reduce between now and the shutdown date.

Read more...