Specifications

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Cisco Cable Modem Termination System Feature Guide
0L-1467-02
Chapter 3 Spectrum Management for the Cisco Cable Modem Termination System
Configuration Tasks
Step 2 To display modulation profile group information, use the show cable modulation-profile command in
privileged EXEC mode:
Router# show cable modulation-profile [ profile ] [ iuc-code ]
profile—(Optional) Profile number (1–8).
iuc-code—(Optional) Internal usage code (IUC). Valid options are:
– initial—Initial ranging burst
– long—Long grant burst
– request—Request burst
– reqdata—Request data burst
– short—Short grant burst
– station—Station ranging burst
Step 3 To display the status and configuration of each upstream, use the show controllers cable upstream
command in privileged EXEC mode. The following example shows the display for the first two
upstreams on a Cisco uBR-MC16S line card:
CMTS# show controllers c6/0 upstream
Cable6/0 Upstream 0 is administratively down
Frequency not set, Channel Width 1.600 MHz, QPSK Symbol Rate 1.280 Msps
Spectrum Group is unassigned
CNR - Unknown - no modems online.
Nominal Input Power Level 0 dBmV, Tx Timing Offset 0
Ranging Backoff automatic (Start 0, End 3)
Ranging Insertion Interval automatic (60 ms)
Tx Backoff Start 0, Tx Backoff End 4
Modulation Profile Group 1
Concatenation is enabled
Fragmentation is enabled
part_id=0x3137, rev_id=0x03, rev2_id=0xFF
nb_agc_thr=0x0000, nb_agc_nom=0x0000
Range Load Reg Size=0x58
Request Load Reg Size=0x0E
Minislot Size in number of Timebase Ticks is = 8
Minislot Size in Symbols = 64
Bandwidth Requests = 0x0
Piggyback Requests = 0x0
Invalid BW Requests= 0x0
Minislots Requested= 0x0
Minislots Granted = 0x0
Minislot Size in Bytes = 16
Map Advance (Dynamic) : 2180 usecs
UCD Count = 0
DES Ctrl Reg#0 = C000C043, Reg#1 = 0
Cable6/0 Upstream 1 is up
Frequency 25.008 MHz, Channel Width 1.600 MHz, 16-QAM Symbol Rate 1.280 Msps
Spectrum Group 1, Last Frequency Hop Data Error: NO(0)
MC16S CNR measurement - 45 dB
Nominal Input Power Level 0 dBmV, Tx Timing Offset 2811
Ranging Backoff automatic (Start 0, End 3)
Ranging Insertion Interval automatic (60 ms)
Tx Backoff Start 0, Tx Backoff End 4
Modulation Profile Group 1
Concatenation is enabled
Fragmentation is enabled
part_id=0x3137, rev_id=0x03, rev2_id=0xFF
nb_agc_thr=0x0000, nb_agc_nom=0x0000