Sat System Structure Optimization

[zamar23]

In the worst case you simply turn off the receivers not in use for the move.

Thanks - I looked again, and you're right on every score - didn't notice that switch power splitter must be inverted compare to motor splitter. Can the diod be turned around and resoldered, if there's a splitter model with detachable cover?

I was looking on the web for a fashion adapter to connect coax splitter to a power cable, and can't seems to find analogs for sale short of relevant patent descriptions. Can you pinpoint any website selling them or a manufacturer?

Will it be enough in case of several receivers controlling a single dish to just put other receivers in Standby only for the move instead of switching Off, and then re-activate again?

 

[pendragon]

Thanks - I looked again, and you're right on every score - didn't notice that switch power splitter must be inverted compare to motor splitter. Can the diod be turned around and resoldered, if there's a splitter model with detachable cover?

I was looking on the web for a fashion adapter to connect coax splitter to a power cable, and can't seems to find analogs for sale short of relevant patent descriptions. Can you pinpoint any website selling them or a manufacturer?

You really don't need a signal splitter for powering multiple switches. Some F-tees would work, although they can be a pain to find. You could also buy a small project box and drill it out for three female F panel connectors and whatever works for a power connector. I've bought these boxes with gasket seals so I know they can be made watertight. Just make sure your power supply can handle the total current load of all the switches.

Will it be enough in case of several receivers controlling a single dish to just put other receivers in Standby only for the move instead of switching Off, and then re-activate again?

Standby should work fine. Just as long as it drops the LNB voltage. You could even leave the 'slave' receivers on as long as they were driving vertical (13V) and have the 'master' drive with horizontal (18V).

 

[zamar23]

Standby should work fine. Just as long as it drops the LNB voltage. You could even leave the 'slave' receivers on as long as they were driving vertical (13V) and have the 'master' drive with horizontal (18V).

Can you think of a slightly modded solution that doesn't have this limitation? Actually, it may add an intolerable headache phasing it out.

Also, what kind of mounting bracket or arrangement would allow for deep adjustment of a mounted next to C-band feedhorn Invacom Quad's focal point on an offset dish? Can't seems to find any elegant solution short of designing from scratch.

 

[zamar23]

Here is a new concept on cutting down number of coax runs into the house - currently pushed in Europe Single-cable distribution systems.

One of implementation solutions is offered by FTA Com. - the manufacturer of Inverto Sat TV equipment brand, one of the best European C/Ku LNB product line: Unicable – a new single cable satellite reception and distribution technology.

 

[hd fan]

Direct TV uses SWM which sounds to be the same concept. More advanced in my opinion is the new Optical LNB by Invacom that uses Fiber Optics as a transmition line. It also allows for so many receivers (I do not remember hiw many but a matrix of 32 sounds familiar) to be conected to an LNB. Very usefull in MDU distributions (ie buildings). check Tele Satellite magazine for more info, the past issue had an article on it.

 

[zamar23]

Since you referred to SWM (Single Wire Multiswitch) technology, this thread about optimal Sat System design is a good fit to give more info about it, which can be found at SWM8 FAQ and weaKnees SWM Equipment sites.

"SWM Single Wire Multi-Switch, provides DIRECTV programming from all current and future Ka/Ku satellites via a single RG-6 coaxial cable run to a simple splitter. Then only one line is required from the splitter to each receiver."

These interested in Fiber Optics use in Sat TV systems, may want to look through the links:

First of its kind: Global Invacom Optical LNB - TELE-Satellite Article
GI FibreMDU Optical LNB - direct from Invacom
Sat TV Fibre optic solutions from Triax UK

 

[pendragon]

If you want to trim down leads, you can always employ bandstacked LNBs. These exist for both C and Ku bands. If you want to spend money, you can stack yourself using stackers/de-stackers from Sonora Design. Kind of pricey, though. SWM is a possibility, but I haven't noticed anything that can downconvert a 500 MHz FTA block to 250-750 MHz. If you can find that, there is a cheap DirecTV accessory to convert it back up.

This may not be a direct solution to your problem because it sounded like you were planning to put the switches on the roof. But that forces you to figure out how to get the power up there. With fewer down leads you could possibly cut your switch count to one and/or move it inside. Just another possibility for others if it doesn't work for you.