Motorola BSR 2000, Configuration And Management Manual

Page: 220 / 650

BSR 2000 Configuration and Management Guide Release 1.0
6-34 MGBI 526360-001-00 Rev. B
Starting FFT Power Level Measurement
Use the fft start command to initiate power level measurement using the FFT
algorithm via the RF Sentry.
MOT#
fft start <
Slot
/
Port
> [ sample {<
256
-
2048
>}] [ mode { Tap-in }] [ window
{ rectangular | hamming | hanning | blackman | blackman-harris }]
where:
Slot
is always 0 for the BSR 2000.
Port
is a valid upstream port number.
sample
256
-
2048
is the number of samples of the power level measurement. The
default is 2048,
mode Tap-in is th e RF Sentry’s operational mode
window is the window coefficient to shape the output of the power level
measurement ( rectangular , hamming , hanning , blackman , or
blackman-harris ). The default is rectangular .
Storing FFT Power Level Measurement Data
The fft store command saves the latest FFT power level measurement data for a
CMTS module to a file system. The user specifies a particular port, the file system
(NVRAM or Flash), and a file name without any extension to be used to store the FFT
power level measurement data. An extension of ".fft" will be automatically added to
the file name.
Use the fft store command to save the FFT power level measurement data, as follows:
MOT#
fft store <
Slot
/
Port>
{ nvram : <
WORD
> | flash : <
WORD
>}
where:
Slot
is always 0 for the BSR 2000.
Port
is a valid upstream port number.
nvram: stores the power level measurement data to the NVRAM file system.
Note: The sample , mode , and window arguments are optional with the fft
start command but can be used to override the current FFT processor
configuration specified with the fft setup command and initiate power level
measurement with a new FFT processor configuration.