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Cisco Broadband Cable Command Reference Guide
OL-1581-07
Chapter 6 Cable CPE Commands
show controllers cable-modem tuner
show controllers cable-modem tuner
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
Syntax Description
Command Modes
Privileged EXEC
Command History
Examples
The following example shows typical tuner settings.
Table 6-19
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#
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.
Table 6-19 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.