Cisco MC16S Instrukcja Użytkownika Pobierz pdf (Strona 7)

Two-Way Cable

Cisco uBR7200 Series MC16S Cable Modem Card Spectrum Management 7

• Spectrum Group 1—This group is non-shared. Upstream RF domains exist for each member

upstream port.

Upstream Port RF Domain

Cable3/0 U0 combiner group A

Cable3/0 U1 combiner group B

Cable3/0 U4 combiner group D

Cable4/0 U1 combiner group F

Cable4/0 U2 combiner group G

Cable4/0 U3 combiner group H

Cable4/0 U4 combiner group I

Cable4/0 U5 combiner group J

• Spectrum Group 2—This group is shared. A single upstream RF domain exists.

Upstream Port RF Domain

Cable3/0 U2 combiner group C

Cable3/0 U3 combiner group C

• Spectrum Group 3—This group is shared. A single upstream RF domain exists.

Upstream Port RF Domain

Cable3/0 U5 combiner group E

Cable4/0 U0 combiner group E

For the 20 to 26 MHz band of each RF domain, the spectrum is channelized according to the channel

width settings of each member port. For example, if the ports U2 and U3 of Cable3/0 are set to

3.2 MHz and 1.6 MHz channel widths, respectively, then spectrum group 2 uses the following

channelization:

> Channel Width Start Stop Center

> (Mhz) (Mhz) (Mhz) (Mhz)

> 1 3.2 20.0 23.2 21.6

> 2* 1.6 20.0 21.6 20.8

> 3* 1.6 21.6 23.2 22.4

> 4 1.6 23.2 24.8 24.0

Note Channels 2 and 3 are not available when channel 1 is in use.

Because the group is shared, ports U2 and U3 will be assigned channels 1 and 4, respectively, to

prevent overlap.

Note There are no alternate frequency assignments for either port and bandwidth is wasted from

24.8-to-26.0 MHz. To create alternate channels, increase the upper boundary from

26.0-to-28.0 MHz.

> Channel Width Start Stop Center

> (Mhz) (Mhz) (Mhz) (Mhz)

> 1 3.2 20.0 23.2 21.6

> 2 3.2 23.2 26.4 24.8

> 3 1.6 20.0 21.6 20.8

> 4 1.6 21.6 23.2 22.4

> 5 1.6 23.2 24.8 24.0

> 6 1.6 24.8 26.4 25.6

> 7 1.6 26.4 28.0 27.4

Care should be taken to reduce the spectrum allocation when used with small channel widths.

Otherwise, there will be a large number of upstream channel slots.

1 2 3 4 5 6 7 8 9 10 11 12 ... 33 34

Komentarze do niniejszej Instrukcji

Brak uwag

Cisco MC16S Instrukcja Użytkownika Strona 7

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Networking Cisco MC16S