: Shaw Gateway: Installation and setup discussion
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Jetranger 2012-01-18, 10:55 PM The two keys you will likely want to program will be the up and down arrows at the top of the remote to do the 'Back' and 'Next' functions. There will likely be some others you will find useful in the touch screen area too. Check Post #1 of this thread (http://www.digitalhome.ca/forum/showthread.php?t=145709) for a link to my pdf of how I have mine setup. Some others here seemed to like it as well.
Jetranger 2012-01-18, 11:04 PM no need for greater than 1Gz...the MoCa filter is a 1Ghz low pass filter (blocks everything above 1Ghz)
So that would imply that everything inside the MoCa network will be running under the 1Ghz frequency..
Are you sure about that? Have you seen this (http://www.digitalhome.ca/forum/showpost.php?p=1338136&postcount=74) info?
CobraGuy 2012-01-19, 03:43 AM The two keys you will likely want to program will be the up and down arrows at the top of the remote to do the 'Back' and 'Next' functions. There will likely be some others you will find useful in the touch screen area too. Check Post #1 of this thread (http://www.digitalhome.ca/forum/showthread.php?t=145709) for a link to my pdf of how I have mine setup. Some others here seemed to like it as well.
Thanks Jetranger,
Yes, it was your PDF that actually prompted my question regarding the "Zoom" command, for some reason "Zoom" is not available in my list of available commands for the portal. Nor are the "Back" or "Next" commands as you have them assigned to your Arrow Up and Arrow Down buttons.
I also tried adding the Moxi MR-1500T3 as an alternate device, the Zoom command is available with that configuration but again not the Back and Next commands. The default Moxi configuration also seems a little light with the default button assignments.
I was hoping to have the Harmony One updated with many of the excellent programming suggestions here in time for the install but it looks like I may have to wait for the Moxi remote to arrive so those commands can be learned rather than programmed. I may try Harmony tech support if I can find some time to ask about the missing commands.
Is anyone else missing commands i.e. Zoom, Back and Next, from their Harmony configuration menu for the Shaw MP2000? Seems odd that I see various configuration examples (Jetranger, JohnnyCanuck 7 and Reboot for example) that contain specific Moxi or Shaw remote commands that just aren't on my Harmony list of available commands.
Cheers...
cdncableguy 2012-01-19, 09:45 AM Jetranger is correct. The Mocha network is running above 1GHz. Shaw's splitters are 1GHz but do allow frequencies over 1GHz. They just get attenuated quicker than lower freqs
Reboot 2012-01-19, 10:48 AM Yeah, I had to do some customization of my Harmony One to get it to where I could mimic all the Shaw remote buttons. That is the beauty of the Harmony, the ability to create custom buttons.
CowtownBiomed 2012-01-19, 10:54 AM I'll still stand behind my statement, that the splitters do not need to have a greater rating than 1Ghz..
That rating is based on a standard -3dB point. (the frequency where by the input signal is attenuated by 3dB)
Meaning that frequencies above that point will be attenuated more than 3dBm.
The MoCa filter IS a low pass filter (~1Ghz)
That does not mean that the MoCa network can not operate above that point, just that the filter starts to block frequency's above that point,.(Stops the MoCa signals from getting to your neighbors ext)
I will have to grab it off again and sweep it higher, to accurately measure the roll off, exact 3dB point ect... to fill the curiosity...
As Cableguy has pointed out too, the 1Ghz splitters do work quite well up to about 1.5-1.7Ghz but with losses from -10 to -20dBm depending on the splitter. (With varying roll offs too)
These types of losses are easily dealt with..
For example the average TV will still make a (OTA) picture with less than -20dBm input signal..(was actually somewhat better than that in the past)
So I doubt that Shaw will start to replace their splitters with anything better..I suspect that they will just start adding amplifiers to every installation to compensate for the losses.
At least that IMO would be the smart thing to do..
I just took a look at one of the main CATV suppliers...it doesnt look like they even make one about 1Ghz yet..I guess that doesnt mean they wont in the future...more like that is the point were the upper frequency limit for the physical cable is..
http://www.blondertongue.com/shop-by-department/catv/splitters/taps/indoor-splitters/default.aspx
Jetranger 2012-01-19, 01:22 PM I think you are just a little confused. Given that the MoCA filter 'blocks' frequencies above 1GHz, that would indicate that this system is using those frequencies above 1GHz rather than those below. I understand what you are trying to say, you are just misstating the scenario. If the MoCA network was running on frequencies below the filter blocking range, the signals would happily pass through to your neighbours and vice versa. Would you not agree?
Edit: Check the info here (http://www.bgi.ca/) as this is one of the manufacturers Shaw uses. They have plenty of higher frequency options.
It sounds like you have a spectrum analyzer or scope. Why not check the range from 1-2GHz 'inside' the MoCA network. I think you will find a healthy amount of signal in that range as I have been told the output is 'quite hot' from the Gateway. Also, the drop amps Shaw installs are only boosting signals below the 1GHz mark so would have no effect on MoCA signal strength.
CowtownBiomed 2012-01-20, 10:55 AM Ahh..Yes I see what you are getting at,...and yes inside the Moca network there will be signals above the 1Ghz point..that is a given. granted...
Again, though,. I will still stand behind my statement about the 1Ghz splitters..here is why:
With any CATV system (even a MoCa one) the goal is always to have signals within the ranges where the devices can operate normally.
For the most part, most (if not all) designs aim to provide a signal level of 0dBm (~100uV) across the given spectrum,.
In the few installations I have seen (and granted I am making some assumptions here) the installation of the drop amp, effectively negates all of the cable/splitter losses inside the MoCa network.
Mine for example is running at +17dBm (@1gHz)...What that means is that they effectively account for 17Dbm of losses inside my house.
A typical 2 way splitter has ~3dB of loss down each leg.(Again @1Ghz) So if I were to split a cable at my portal my signal at the portal would drop to ~14dBm and there would be ~14dBm for the other leg..
That is 14dBm higher than I actually require.
Now...Above 1Ghz the splitters would be lossy(er) and would roll off (attenuate) at a higher rate..again with 14dB of headroom to work with there would not be an issue.
The 1Ghz BT splitters I use here are 12dB down at 2Ghz so if I were to use the 1Ghz splitter at home I would still have 2dBm to work with..(@2Ghz)...
That being said, 0dBm is only the goal, like I mentioned above most devices can work down to about -20dBm (I'm not sure that is the case with the Gateway/portals) so that effectively give me ~34 dB of headroom to work with at 1Ghz or 22dBm at 2Ghz..(again asuming it will work at -20)
I guess what I am trying to point out is that inside the network (on the installs I have seen) there is plenty of signal to work with..
The drop amps do actually amplify above the 1Ghz point too, from what I can tell they ramp (slope) up some (amplify higher frequencies more than lower ones) though to what degree I have not investigated..
I hope that sufficiently explains things..
Unfortunately I am unable to take my spectrum analyzer home ($40,000 of sensitive test equipment has to stay here)
My old dinosaur of a scope is only rated to 250Mhz...
My handheld is not rated for above 1Ghz..though I guess I could always sweep and measure its losses an then compensate...(too much hassle)
LD500, do you still have the Netgear Moca Ethernet kit installed? Is it compatible with Gateway system? Didn't see any follow-ups on that, or perhaps I missed that post.
Jetranger 2012-01-20, 02:07 PM So, to summarize, CowtownBiomed, you are reinforcing the statement I made previously that the MoCA network will run acceptably through the 1GHz rated splitters that Shaw typically uses. Thanks for all the technical info.
CowtownBiomed 2012-01-20, 03:10 PM If you are referring to post #74, then yes, with the caveat that there is a amplifier in place..to overcome the losses of the 1Ghz splitter above 1Ghz..
Jetranger 2012-01-20, 03:37 PM No, the amp is there to ensure adequate signal 'below' 1GHz for my legacy PVRs. The rating on the amp is 54-1003MHz, or; 1.003GHz.
CowtownBiomed 2012-01-20, 04:55 PM It does however amplify signals well above the 1Ghz point...like the splitter.
I am guessing here (based on previous experience) but, if there is a +20dB gain at 1Ghz there will also be ~10dB of gain at ~2Ghz..(perhaps somewhat less)
Like the splitters, just because it is rated for 1Ghz does not mean that it will not perform above that point...it will however roll off as the frequency increases. (basic LC theory)
IE there is no "Hard wall" frequency where suddenly it stops working..all together..it will just taper off.
From using my handheld, it would appear that the slope of the drop amps is ~4-7dB up from 750Mhz to 1000mhz (1Ghz) that slope would continue on for a while.. and would probably still be the same at 1.25 to 1.5 (+4 to 7 higher) with it slowing decreasing in gain until it rolls of completely..
Do you have access to the drop amp data sheets?
I cant seem to be able to find them...
Jetranger 2012-01-20, 05:05 PM Here's a link to the sheet on the amp that is installed in my setup: http://broadband.motorola.com/catalog/product_documents/bda_Catalog_Specifications_112305_with_return.pdf
rrcool 2012-01-20, 05:15 PM Anything I can do to get to my LG TV's sleep timer with the portal remote? Or do I have to reprogram my old Logitech?
Jetranger 2012-01-20, 05:38 PM rrcool, no, and; yes, in that order. Sorry;)
CowtownBiomed, I just got off the phone with Motorola(yes, I like to go the extra mile) and, unfortunately, they don't have an output frequency response graph available in the general library. I could take my amp to a friend who has the necessary equipment and get a graph printed out but that's a lot of work for me. Given that the rating is so wide to begin with and they are specific enough to list it to 1.003GHz, I would think the effective output above that range would be generally insignificant.
Now, I have been wrong before but I'm quite certain Shaw isn't using a low frequency amp to boost an already 'hot' output that is likely above said amplifier's rated output, ie: MoCA network from Gateway.
CowtownBiomed 2012-01-20, 05:58 PM That's my take on it..
When you start with sufficient signal below 1Ghz to start with then why add an amp at all..
All I can assume is that it is actually there to amplify signals slightly higher than its rated output..
Which in my mind would work just fine..
I could do the same myself (remove it and bring it here) but I agree...too much hassle...
LD500 2012-01-21, 01:13 AM Kuri: I decided to take out my Netgear MOCA adapters before Shaw installed my Gateway. Didn't want any confusion about what was the problem if things didn't go smoothly. Glad I did that because my intial Shaw installer seems to have made various errors in the install. I might try re-installing the Netgear MOCA later on. For now I'm going wireless but won't get the same speeds.
LD500 2012-01-21, 01:16 AM Re: 1GHz splitters and Shaw Gateway.
Is it possible that the MOCA (standard) used by the Gateway system is simply choosing frequencies close to or below 1 GHz when a 1 GHz splitter is being used?
I believe MOCA can scan the channels and choose accordingly however I can't recall if any of those channels are below 1GHz. If so, having a 2 GHz splitter could indeed yield better results if there is some issue under or near 1GHz but unlikely.
Jetranger 2012-01-21, 01:22 AM It's too bad you haven't tried your Netgear equipment yet. I'm curious to see the results just for the sake of it.
As for the splitter issue, I think it's all moot. You could buy a satellite splitter and try it and see if there is any difference but I doubt you would notice anything. Shaw has tested this Gateway system with the equipment they have in the field and determined it is 'compatible'. They have extensive abilities for testing and have far more experience than most of us here.
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