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post #286 of 290 (permalink) Old 2019-09-29, 10:34 PM
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This might help Shaw Direct Blog

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Shaw Direct uses two polarities for our service – horizontal and vertical, which both require a different electric voltage to activate (10.5 to 14.2 volts for vertical, and 15.2 to 21.0 volts for horizontal).
As long as the voltage at the LNB does not drop below 15.2v on the 21.0v transponders everything should be OK. The other issue is how the LNB draws its power. If it's shared between all 4 feeds than the total resistance will be 1/4 of each leg. If it's drawn on only one port (typical of some switches which use port one) then copper RG6 would only be required on that cable. I suspect that 10.5v may be the minimum voltage for the LNB to operate properly.
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post #287 of 290 (permalink) Old 2019-09-29, 10:42 PM
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Couldn't find any current specs for the Shaw LNB but it may be possible to construct a special cable and measure it with a meter. Contacting Shaw or the the LNB maker is another possibility.
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post #288 of 290 (permalink) Old 2019-09-30, 01:43 AM Thread Starter
 
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Cool Still Lost...

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Originally Posted by ExDilbert View Post
This might help Shaw Direct Blog



As long as the voltage at the LNB does not drop below 15.2v on the 21.0v transponders everything should be OK. The other issue is how the LNB draws its power. If it's shared between all 4 feeds than the total resistance will be 1/4 of each leg. If it's drawn on only one port (typical of some switches which use port one) then copper RG6 would only be required on that cable. I suspect that 10.5v may be the minimum voltage for the LNB to operate properly.
Thanks for at least finding the limits M8 and the Link to the Blog (although I think you got the only Tech info there). => 10.5 to 14.2 volts for vertical, and 15.2 to 21.0 volts for horizontal => at least we know where the goal posts are. Now we just need to figure out how to get there every time.

As far as "how the LNB draws its power. If it's shared between all 4 feeds than the total resistance will be 1/4 of each leg." Without a circuit to analyse we are just guessing. I'm an Electrician with a couple years of Electrical Technician/Technologist Training ages ago at BCIT on top of that, and without data, it's impossible for me to figure this out.

Hopefully someone we read this and offer up some suggestions or answers on how Shaw Direct calculates Vdrop on the cables.

Regards,
Jim
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post #289 of 290 (permalink) Old 2019-09-30, 01:33 PM
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It should be possible to measure the voltages at the LNB with the current cables. You just need to fabricate a cable to connect a meter. Then calculate the voltage drop and current draw.
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post #290 of 290 (permalink) Old 2019-09-30, 08:45 PM Thread Starter
 
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Cool Cannibalize a Cable Splitter...

Yes, I could make such a device. I'd just cannibalize a Cable Splitter like this:



But again, we'd just be checking the voltage level as we know it works now.

Regards,
Jim
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