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Everything arrived yesterday (delivered on a Sunday!) which I wasn’t expecting. I had my original 4x8 cascaded into the new 5x8. Odd thing that the three end tv locations that use a diplexer would not provide a satellite signal, but did provide the ota signal. Two other locations that did not use a diplexer did get a satellite signal. I rearranged and removed the 4x8, and now all locations get the satellite signal. Today I’m going to see if I have to put the 4x8 after the new 5x8. I wouldn’t have thought it would make a difference, but the two multiswitches don’t seem to be playing nice together.
 

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Of course they do. All things man made age and fail over time.

However, I'm watching your posts elsewhere and as you say a "20 point drop, instantly, at the same time each day. That, to me, says atmospheric anomaly or transmission interference." This doesn't point to a multiswitch IMHO as it's a repeating daily occurrence and not all the time.
 

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I still think it is the multiswitch. 57 could be right with voltage charges due to appliances, etc as part of the problem. If it is on the same breaker, it is possible the multiswitch power has a failure at times. Or a grounding issue or frost on a connector outside. etc. Could be a number of things, but lets rule out the item that can cause this issue if not functioning 100%.

Just remove the multiswitch and see if it happens again on ALL the receivers.
 

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Looks like the 12-noon signal loss may be solved

I believe the Phillips is the problem. After Jan 21, anything plugged into 13v & 18v was problematic. When I swapped in my backup Aspen Eagle, this problem seemed to go away. If you look at the photos, there is a different frequency range between units. I wonder if Shaw did something, frequency wise, which caused a problem for the Phillips, or if the 13v & 18v dish connections just failed. The Phillips has been up, mostly untouched and working for maybe eight years?


 

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Glad you got it fixed!

tvmaster,

That's an interesting outcome. A while back I too had some issues and ended up replacing my Phillips Multiswitch which was the same vintage / model as yours.

Check this thread: https://www.digitalhome.ca/forum/11-shaw-direct-satellite/125300-tough-installation-location-help-please-15.html



I changed it to a Steren 201-747 4x8 Sky Switcher Multi-Switch after I couldn't find a Pico Macom TSMS-4/8 (Current Shaw standard).

It's Specifications:

Frequency Range: 950-2300 MHz
Noise Figure: 4.8 dB min
Cross Polar Isolation: 40 dB min
LNB to LNB Isolation: 35 dB min
Rec. to Rec. Isolation: 40 dB min
Control Voltage:
LNB A 13 V/0 kHz
LNB A 17 V/0 kHz
LNB B 13 V/22 kHz
LNB B 17 V/22 kHz
Power Supply Input: 24 Vdc
Receiver Power Input: 13/17 Vdc
Phase III Compatible

The Shaw standard is:



It's specs are pretty much the same. But neither of them fits your Eagle Aspen frequency range. ( 950-2300 MHz Vs. 54-2150 MHz for the Eagle Aspen).

In my situation, once I got the system back working I stopped monkeying around with it (of course!) and never went back to check the Phillips Multiswitch even though I had not fully determined if it was at fault (or the line losses were somehow just too much for it to overcome without the in-line amplifiers.) I also never spent the time to deduce which transponders were involved, or if (like you) the 13v & 18v connections were the problem. Maybe if I get ambitious I'll go back over the data and sort it out.

I didn't scrap the Phillips Multiswitches but suspect they may have contributed to the loss of signal.

What's scary about your problem was the issue was cyclitic and happened at virtually the same time every day. I'm just glad you seem to have it sorted.
 

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So what do you think happens above 2150, satellites in play, transponders etc. At one point, I believe the Eagle Aspen WAS Shaw’s chosen multiswitch, wasn’t it?
 

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Don't get me wrong tvmaster, the Eagle Aspen was Shaw's chosen multiswitch but they've just moved on since then.

And it may not be for technical reasons as they'd have to change out thousands of working multiswitches. It's more likely it was cost driven, as most large firms will put major purchases like thousands of multiswitches out to bid against a specification. And typically low bid wins.

So while the new "standard" can utilize 950-2300 MHz, Shaw is probably only using a portion of the bandwidth. Say something like nothing below 1000 or above 2100 MHz. Then all of the multiswitches listed above will work just fine. I'm not familiar enough with the details to know what frequencies are being used from the LNB to the Receiver. I guess if I borrowed a scope I could figure it out, but someone here probably knows it already.

I'm just glad you have it sorted.
 

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ok, thanks. We'll see if anyone with superior technical knowledge to ours chimes in and tells us the significance of the frequency differences...
 

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As long as the switch is good from 950-2150 MHz, you'll be fine. Shaw receivers will only tune within that range, and always less. For dual satellite LNBs (F1, F2), only 950-1450 MHz is used. My fuzzy recollection for the triple satellite LNBs (F1, G1, F2) is that 1052-2127 MHz is used for F1 & G1 and 950-1450 MHz for F2.

Frequencies below 950 MHz are often used for passing terrestrial TV (OTA) through a fifth input terminal. Other switches that work from 250-2150 MHz may have been designed for DirecTV in the States, because some of their LNB technology used that lower range. Anything above 2150 MHz is meaningless.

For all intents and purposes, a switch that supports a wider range than 950-2150 MHz should work just as well for Shaw as one that is restricted to that range.
 

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Excellent info, thanks for clearing all this up. Both these switches include a connection for OTA antennas, so that makes sense as well.
 
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