Modem Can Only Lock One Upstream Channel. Why

Question

Upstream Bonded Channels ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower1LockedATDMA15120 Ksym/sec35600000 Hz56.9 dBmV2Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV3Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV4Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV

CCAndrew · Answer

Your upstream channel you posted is 57, the range that Comcast uses ends around 49-50. So you need to lower it by at least 7db for fun. A four way splitter has 7db of loss, if you can remove any/all extra splitters to lower your upstream, do it. If you can’t, have a tech out to troubleshoot

Dawntreader1 · Answer

'you’ve got to get that upstream down by about 7db'What do you mean?

CCAndrew · Answer

The one that you have is too high and out of spec, so it’s a safe bet that the others are also out of spec and that’s why they aren’t locking in. Could also be a high pass filter put on by maintenance for ingress. But you’ve got to get that upstream down by about 7db, maybe an extra splitter to get rid of

Dawntreader1 · Answer

Thank you, but I fear something else is wrong. Now it says this and I have done nothing...

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	1	5120 Ksym/sec	35600000 Hz	41.5 dBmV
2	Locked	ATDMA	2	5120 Ksym/sec	29200000 Hz	41.2 dBmV
3	Locked	ATDMA	3	5120 Ksym/sec	22800000 Hz	41.2 dBmV
4	Locked	ATDMA	4	5120 Ksym/sec	16400000 Hz	40.2 dBmV

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Dawntreader1

Modem Can Only Lock One Upstream Channel. Why

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CCAndrew

Dawntreader1

CCAndrew

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