Compact CATV tuners for digital cable set-top boxes

27 August 2003 Telecoms, Datacoms, Wireless, IoT

Murata has developed compact digital CATV tuners intended for digital cable set-top boxes (STBs). The product size is as compact as 50 x 41 x 12 mm - approximately 40% of its conventional models - which is achieved by the use of dedicated ICs in the 1st and 2nd mixers and an optimised circuit configuration.

The number of components used in the CAPTU3000 series is reduced to about 30% of that of our conventional tuners. Furthermore, since the series incorporates a diplexer circuit (used for differentiating between upload and download signals in bi-directional data communication.) for bi-directional communication, and a splitter circuit (used for signal distribution to cable modem tuners and sub video tuners) for signal distribution to other tuners, it meets the trend towards STBs with more miniaturisation and diversified functions. It also contributes to a reduction in the space occupied by the front-end, and to simplified circuit design.

Using a low-distortion, low-noise amplifier circuit that takes advantage of Murata's microwave technologies, the design improves the distortion characteristics of the splitter circuit (mutual modulation distortion: 70 dB or less). Therefore, the series reduces image quality deterioration due to signal distribution, thus providing high-resolution images.

The series offers an extensive product lineup, enabling selection of models matching the specifications of various digital cable broadcasts throughout the world. It is also applicable to the terrestrial digital broadcasts of North America.

The digital cable STB market anticipates the spread of highly functional models that will provide two-way communication via the Internet, plus hard disk recording in addition to the conventional TV reception. Designs of more compact STBs, with multifunctional models incorporating several tuners (main video + sub video + cable modem), are being developed.

Further reading:

Strategic agreement for eSIM solutions
Avnet Silica Telecoms, Datacoms, Wireless, IoT
This agreement between Avent Silica and Thales covers the latter’s eSIM solutions that are compliant with GSMA SGP.22 and SGP.32 standards.

Read more...

---

High precision multi-GNSS antenna
RS South Africa Telecoms, Datacoms, Wireless, IoT
The Amphenol PCTEL GNSS-L125-DH-NF multi-GNSS antenna is a high-performance antenna designed for reliable global navigation satellite system reception in demanding environments.

Read more...

---

Designing IoT devices for deterministic LPWAN environments
Editor's Choice Telecoms, Datacoms, Wireless, IoT
Built on Ultra Narrow Band communication technology, the Sigfox network focuses on low power, wide area M2M connectivity rather than maximising data throughput.

Read more...

---

Robust LoRaWAN for distributed IoT
CST Electronics Telecoms, Datacoms, Wireless, IoT
InHand Networks has unveiled its latest LoRaWAN gateway, the EC312, marking an evolution in industrial-grade connectivity solutions for distributed IoT environments.

Read more...

---

Miniaturised tuneable harmonic filter bank
RFiber Solutions Telecoms, Datacoms, Wireless, IoT
Modern RF and microwave communication systems require compact, high power filtering solutions to suppress unwanted harmonic signals generated by power amplifiers, and to address this challenge, Tri-TeQ has developed a miniaturised broadband tuneable harmonic switched filter bank.

Read more...

---

Nordic accelerates cellular IoT leadership
RF Design Telecoms, Datacoms, Wireless, IoT
The company unveiled its next-generation portfolio featuring Cat 1 bis, satellite NTN, and advanced LTE-M/NB-IoT with edge AI, delivering secure and resilient connectivity across billions of IoT devices.

Read more...

---

Powering the future of industrial automation
IOT Electronics Telecoms, Datacoms, Wireless, IoT
5G, the 5th generation of wireless broadband technology, enables users to establish reliable connectivity, which in turn enables flexible, autonomous, and efficient processes from production to logistics.

Read more...

---

Wi-Fi 7 tri-band connectivity module
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
Quectel has introduced the FCE870Q, a compact short range wireless connectivity module designed for next generation IoT devices that require high throughput, low latency, and reliable operation in dense wireless environments.

Read more...

---

Compact cellular IoT SiP with GNSS
RF Design Telecoms, Datacoms, Wireless, IoT
Combining low-power connectivity, edge processing, and positioning capabilities in a compact module, Nordic’s nRF9151 targets applications such as asset tracking, smart metering, industrial monitoring, and smart city infrastructure.

Read more...

---

Enabling the next generation of high-performance wireless designs
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
Espressif Systems has expanded its wireless connectivity portfolio with the introduction of the ESP32-E22, a high-performance connectivity co-processor designed for next generation embedded and IoT systems.

Read more...

---