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baseChannel – This field sets the base cable channel number for each of the 3 banks of 4

carriers.

carrierOn – This field allows you to enable or disable individual carriers in the bank of 12.

alternateIp – This field will configure the QAM6 to have a second IP address. This IP address

can be a multicast IP address. However, the QAM6 does not notify a managed switch that it

wants this multicast IP address via IGMP.

tftpIP - This address field sets the address of the file server for SW upgrades.

tftpFilename - This field sets the filename of the new SW image.

DO NOT turn off power or unplug a card that is updating its SW image. YOU WILL

create a doorstop.

reset - This field executes a SW reset of the QAM6. It is almost user transparent but will create a

brief video glitch on the channels it is modulating.

Application Note: The QAM6 supports an emergency broadcast override. If a video stream is

sent to port 25600 it will override all of the channels.

Application Note: Some QAM6 boards have an RF spur that can interfere with analog television

channels. The spur is 1176 MHz minus the desired center RF frequency for each group of four

channels. For channels 23 through 94 this means that the spur will be at (1086 – 6 * channel)

MHz. Change the frequency plan to minimize the impact of the RF spurs.

When debugging QAM6 issues, click on the qamLog button to see the QAM6 system log. This

log is mainly for Technicolor technical analysis but a short summary is:

A = Arp reply

bad(#) = Discarded # number of unexpected Ethernet packets.

C = Command and control message received

c## = Continuity counter error. May indicate multiple channels to same port.

PMT## = PMT changed on a channel

T = PCR discontinuity

7 COM2000 FIRMWARE UPGRADE PROCEDURES

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Technicolor COM2000 Betreibershandbuch Seite 101