Command Reference

show controller cable-modem tuner

To display the settings for the upstream and downstream tuners used by a cable modem, use the show controller cable-modem tuner Privileged EXEC command.

show controller cable-modem tuner

Syntax Description

There are no key words or arguments for this command.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 NA.

Sample Display

The cable modem’s tuner settings are displayed in the following example. See Table 3 for output field possibilities and descriptions.

uBR904# show controller cable-modem 0 tuner Tuner: status=0x00

Rx: tuner_freq 507000000, symbol_rate 5360736, local_freq 11520000 snr_estimate 17488, ber_estimate 0, lock_threshold 26000

QAM not in lock, FEC not in lock, qam_mode QAM_64

Tx: tx_freq 20000000, power_level 0x3E, symbol_rate 1280000

Table 3 Show Controller Cable-Modem Tuner Field Descriptions

FieldDescription

tuner_freq Indicates the current downstream frequency.

symbol_rate Indicates the downstream or upstream symbol rate in use.

snr_estimate Signal to noise estimate in dB X 1000.

ber_estimate Bit error rate estimate (always 0).

QAM status Indicates if QAM/FEC loc has been acquired and the modulation mode in use.

tx_freq

Current upstream frequency.

power_level Transmit power level as set in the hardware. The units are unique to the hardware used. Use the show controller cable-modem 0 mac state EXEC command to see the power level in dBmV.

Related Commands

show controller cable-modem

show controller cable-modem bpkm show controller cable-modem des show controller cable-modem filters show controller cable-modemlookup-table

38Release 11.3(4)NA

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Cisco Systems UBR904 manual Show controller cable-modem tuner

UBR904 specifications

The Cisco UBR904 is a versatile broadband access device designed to deliver high-speed internet and data services in various deployment scenarios, particularly suitable for cable operators and service providers. This device allows operators to provide broadband services over a wide area, utilizing advanced technologies to ensure reliability and performance.

One of the key features of the UBR904 is its capability to support multiple channels for upstream and downstream communication, allowing for greater bandwidth and improved network performance. With its integrated DOCSIS (Data Over Cable Service Interface Specification) compliance, the UBR904 enables operators to leverage existing coaxial cable infrastructures to deliver data services efficiently. This makes it an ideal choice for operators looking to expand their service offerings without the need for extensive infrastructure changes.

Equipped with a powerful processor and ample memory, the UBR904 is designed for high throughput and low latency, supporting IP data services, voice services, and video on demand. It utilizes advanced modulation techniques and error correction algorithms that enhance data transmission efficiency and reliability. This results in a robust platform capable of meeting the demands of high-density areas while accommodating future growth.

The UBR904 also features flexible management capabilities. It includes support for SNMP (Simple Network Management Protocol), enabling operators to monitor and manage network performance effectively. The device can be easily configured through a graphical user interface or command-line interface, providing system administrators with the tools needed for straightforward deployment and maintenance.

In addition to its core functionalities, the UBR904 integrates security features to protect network traffic and ensure user data integrity. This includes capabilities for secure tunneling and access control lists, which enhance the security of the broadband connection.

Furthermore, the Cisco UBR904 is designed with scalability in mind. Operators can easily scale their networks by adding additional modules or interfaces as demand grows. This ensures that the UBR904 can meet the evolving needs of service providers without necessitating a complete hardware overhaul.

In summary, the Cisco UBR904 is a robust, feature-rich broadband access device that combines high performance, advanced technologies, and scalability, making it an excellent choice for operators looking to deliver high-speed internet and data services across diverse environments. Its ease of use and extensive management features further enhance its appeal, positioning it as a key player in the broadband access market.