Cisco Broadband Cable Command Reference Guide

show controllers cable-modem tuner
show controllers cable-modem tuner
Syntax Description
Command Modes Privileged EXEC
Command History
5-120
Cisco Broadband Cable Command Reference Guide
Chapter 5 Cable CPE Commands
To display the settings for the upstream and downstream tuners used by a router, use the show
controllers cable-modem tuner command in privileged EXEC mode.
Cisco uBR904, uBR905, uBR924, uBR925 cable access routers, Cisco CVA122 Cable Voice Adapter
show controllers cable-modem number tuner
number Identifies the cable interface (always 0).
Release Modification
11.3(4)NA This command was introduced for the Cisco uBR904 cable access router.
12.0(4)XI1 Support was added for the Cisco uBR924 cable access router.
12.1(3)XL Support was added for the Cisco uBR905 cable access router.
12.1(5)XU1 Support was added for the Cisco CVA122 Cable Voice Adapter.
12.2(2)XA Support was added for the Cisco uBR925 cable access router.
Examples The following example shows typical tuner settings. Table 5-15 describes the output field possibilities
and descriptions.
Router# show controllers 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
Router#
Table 5-15 show controllers cable-modem tuner Field Descriptions
Field Description
tuner_freq Indicates the current downstream frequency.
symbol_rate Indicates the downstream symbol rate in symbols per second.
local_freq Frequency on which the transmitter and tuner communicate.
snr_estimate Signal-to-noise ratio (SNR) estimate in dB multiplied by 1000.
ber_estimate Bit error rate estimate (always 0).
lock_threshold Minimum SNR that the router will accept as a valid lock.
QAM status Indicates if QAM/FEC lock has been acquired and the modulation mode in use.
tx_freq Upstream frequency sent to the router by the CMTS in the UCD message.
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