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show cable modulation-profile
221 short
221 long
221 a-short 64qam 128 no
221 a-long
Router# show cable modulation-profile 241
Mod IUC
241 request qpsk
241 initial qpsk
241 station qpsk
241 a-short 32qam 160 no
241 a-long
241 a-ugs
Router#
The following shows sample output for the upstream option, which displays the modulation profile
currently being used by a particular upstream:
Router# show cable modulation-profile cable 4/1 upstream 1
Mod
41
41
41
41
41
Router#
The following example shows typical detailed output for an individual modulation profile that is
displayed when using the verbose option. Each IUC is described in detail.
Router# show cable modulation-profile 1 verbose
Modulation Profile Number:
Burst:
IUC:
Modulation:
Preamble length:
Differential Encoding:
FEC parity T bytes:
FEC codeword length K bytes:
Scrambler seed:
Max short burst size B bytes:
Guard time size in symbols:
Shortened last codeword:
Scrambler:
Preamble offset:
Preamble type:
RS interleaver on:
RS interleaver depth:
RS interleaver block size:
Modulation Profile Number:
Burst:
IUC:
Modulation:
Preamble length:
Cisco Broadband Cable Command Reference Guide
3-136
qpsk
72
no
0x5
qpsk
80
no
0x8
0x5
64qam 128 no
0xF
Type
Pre Diff FEC
len enco T
BYTE BYTE
68
no
0x0
2
no
0x0
128 no
0x5
0x9
64qam 132 no
0xC
16qam 80
no
0x3
IUC
Type
Pre Diff FEC
len enco T
request qpsk
64
no
initial qpsk
128 no
station qpsk
128 no
short
qpsk
88
no
long
qpsk
76
no
0x4B 0x152 6
8
0xDC 0x152 0
8
0x63 0x152 10
20
0xC8 0x152 0
20
FEC
Scrmb Max Guard Last Scrmb Pre
k
seed
B
time
siz size
0x10 0x152 0
8
0x10 0x0
0
0
0x22 0x152 0
48
0x4C 0x152 6
8
0xE7 0x152 0
8
0xE7 0x152 0
8
FEC
Scrmb
Max Guard Last Scrmb Pre
k
seed
B
time
BYTE BYTE
siz size
0x0
0x10 0x152
0
8
0x5
0x22 0x152
0
48
0x5
0x22 0x152
0
48
0x5
0x4C 0x152
35
42
0x6
0xE8 0x152
135 143
1
tdma
request (IUC 1)
qpsk
64
off
0x0
0x10
0x152
0
8
no
enabled
184
qpsk0
na
0
0
1
tdma
initial maintenance (IUC 3)
qpsk
128
Chapter 3
Cisco CMTS Show Commands
yes
yes
176
qpsk0 na
yes
yes
168
qpsk0 na
yes
yes
192
qpsk0 no
yes
yes
192
qpsk0 no
Pre
CW
offst Type
short
no
yes
0
qpsk0 no
no
no
0
qpsk1 no
no
yes
0
qpsk0 no
yes
yes
0
qpsk1 no
yes
yes
0
qpsk1 no
yes
yes
0
qpsk1 no
Pre
CW
offst Type
short
no
yes
396
qpsk
no
yes
6
qpsk
no
yes
6
qpsk
yes
yes
396
qpsk
yes
yes
396
qpsk
RS
RS
na
na
na
na
na
OL-1581-08
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