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Ignition
Trouble shooter
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Anyone know how full VM's network is?

Anyone know how much space there is left in VM's 750, 860 and 1002 MHz networks?

Just interested in how easy it will be to make 96 - 192 MHz of room for DOCSIS 3.1.
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Tudor
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Message 2 of 16
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Re: Anyone know how full VM's network is?

How long is a piece of elastic!  Different encoding and other factors make it imposinle to tell. 


There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal
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Trouble shooter
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Message 3 of 16
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Re: Anyone know how full VM's network is?

I guess I wasn't clear - I mentioned the RF bandwidth as that's what I was interested in, how much room there is left for new carriers. A spectrum analyser will give a ball park - the QAMs look the same however busy they are Smiley Happy

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Superuser
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Message 4 of 16
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Re: Anyone know how full VM's network is?

in what area. the network is not just one big network. Its 1000's of smaller networks with routers not switches

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Trouble shooter
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Message 5 of 16
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Re: Anyone know how full VM's network is?

I hoped the reference to MHz and the three different network capacities would indicate I'm talking about the RF networks not the IP network.

The relevance of routers rather than switches I'm not sure about - both segment networks for capacity planning purposes.

The key differences between areas are the old-school VoD and DOCSIS QAM counts. For obvious reasons the QAMs allocated to linear TV are constant.

Getting an idea of how full a 1 GHz network is should give an idea of how full the lower rated networks are - see how much space there is free in it.

Be interesting to see how much capacity migration to MP4 frees up too.

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Superuser
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Message 6 of 16
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Re: Anyone know how full VM's network is?

well that would be down to the hardware at the end i though think. the coax cables used can go way into the ghz range in terms of pure signal

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Trouble shooter
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Message 7 of 16
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Re: Anyone know how full VM's network is?

More the stuff in the middle to be honest but I don't think this is going places any time soon. I'll update when I've more information which will be at the end of the month.

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Message 8 of 16
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Re: Anyone know how full VM's network is?

Analyzer.PNG

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Trouble shooter
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Message 9 of 16
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Re: Anyone know how full VM's network is?

There's space for a QAM free in between the broadband and TV but apart from that full of carriers up to 750MHz. Plenty of room left on this network but any 750MHz networks probably need some work for DOCSIS 3.1 Smiley Happy

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Message 10 of 16
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Re: Anyone know how full VM's network is?

The empty space is where the old DOCSIS 1.1 carrier lived at 332.75 MHz, which is nice.

On the smaller span you can also see the guard bands in between the QAMs.

 

331MHz.PNG

 

 

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