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Command Reference
38
Release 11.3(4)NA
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
Related Commands
show controller cable-modem
show controller cable-modem bpkm
show controller cable-modem des
show controller cable-modem filters
show controller cable-modem lookup-table
Field Description
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.