Installation guide

74
Cisco uBR7200 Series Universal Broadband Router Wireless Modem Card and Subsystem Installation and Configuration
78-6030-03
Command Reference
radio histogram
A histogram is a collection of statistics sampled over time on a burst-by-burst basis and presented as a
function of bins. The number of bins and the size of bins are user defined.
Use this command in interface configuration mode to configure a histogram collection specification. The
data for the histogram is collected as soon as the command succeeds and continues until either the
specification is deleted using the no option, or the specified collectionInterval expires. The collected
data is printed out to the console at user-specified intervals.
A histogram statistic is created when data is sampled for every burst. For each sampled burst, the count
in a specific bin is incremented. The number of bins in the histogram is specified by the NumBins
parameter.
For every histogram defined, antenna_num and tone are conditional. The antenna_num is required for
the attributes in, receivedPower, GainSettingsIF, gainSettingsRF, and totalGain. Tone may optionally
be specified for the attributes in, inr, and constVariance.
Use the no version of this command to delete any histogram configuration specification.
Use the histdisplay format of this command to control the printing of the information to the screen.
Use the histclear format of this command to clear the collected histogram data.
radio histogram statParam antenna_num [dsp dspId] StartBinValue BinDelta NumBins BitShift
[collectionInterval interval][periodic interval sum {true | false}] [tone circulate | average | number
tone-number]
no radio histogram statParam antenna_num [dsp dspId]
radio histdisplay statParam antenna_num [dsp dspId] {on | off}
radio interface slot/port histclear statParam antenna_num [dsp dspId]
Note There should be no measurable impact or degradation of router performance from running
histograms. Cisco recommends, however, that the number of histograms run simultaneously be kept
to a minimum, and that any histograms no longer needed be terminated.
Note Up to 1024 32-bit words are available for all histogram parameters on a single DSP. Each histogram
requires (NumBins + 4) * 2 words. The attributes in in, inr, and constVariance can be captured on
any DSP, while the others can be captured only on certain DSPs. Distributing histogram requests
across DSPs provides better memory utilization. In general, it is best not to specify the DSPs without
special knowledge of the system.
Selecting the Correct DSP
In most cases, the default DSP should provide acceptable results. Table 14 outlines for which DSPs the
statistical parameters are most meaningful.