| [Satellite] What is a "Signal combiner" A signal combiner is the same thing with a splitter or a diplexer? Which one should be used to combine sat signal and ota and which one to split those 2 signals? Thank you |
|
|
|
 cdruGo ColtsPremium,MVM
join:2003-05-14
Fort Wayne, IN
kudos:5
 ·Frontier FiOS
| A combiner is the same as a splitter, just flipped around. The feed from the satellite dish to the receiver can't use a splitter except only in specail circumstances that you likely will never have.
What you want is a diplexer. They look the same as a splitter/combiner, but they serve a different function. They shift one side of the signal to a higher frequency so that both signals can travel on the same piece of coax. Then another diplexer, turned around, shifts them back down and separates them into different outputs.
--
Win some of $250 in prizes. Try your luck with The Amazing Race Contest. |
|
| reply to Mark33
In order to do that look what a vendor recommended me (»www.homecable.com/lineamp.html). This is not a diplexer is it? |
|
 egnlsnPremium
join:2003-09-26
Salt Lake City, UT
 ·Digis
| Bad link.
A diplexer looks just like a 2-way splitter. As cdru wrote, a diplexer separates the satellite signals from the off-air signals and sends them out different ports. One port is labelled "SAT" or "950-2250", and the other one is labelled "ANT" or "5-862 (or 40-862)." The port all by itself is labelled "IN/OUT" or "TV/SAT." |
|
1 edit | The link is fine, you just have to take the ) off the end that the forum software added. |
|
| reply to Mark33
My question to The technical stuff from »www.homecable.com was:
"I don't understand; the diagram that you sent me suggests to use s signal combiner to carry both ota and sat signal on the same coax (»www.homecable.com/lineamp.html). From some other sources and from specs of various devices it results that a diplexer can carry both signals? Very confused. Thank you again."
This is their answer:
"A diplexer won't put the satellite receiver output to TV on channel three or four."
|
|
egnlsnPremium
join:2003-09-26
Salt Lake City, UT | What exactly is it that you are trying to do?
--
CIAO! |
|
| reply to Mark33
To feed from sat receiver (Directv) and ota antenna both signals to 3 tvs on 1 coax per tv. I have already in 3 rooms 1 lead, I don't want to make more holes and run other wires, and I want in those rooms to get ota and sat signal in such a way that I can see ota signal even when the sat receiver is on. Thank you. |
|
 BuckarooBBeware Lectroids from PlanetXPremium
join:2001-10-27
Cloverdale, VA | reply to Mark33
How many recievers do you have? |
|
egnlsnPremium
join:2003-09-26
Salt Lake City, UT Reviews:
·Digis
| reply to Mark33
said by Mark33:
To feed from sat receiver (Directv) and ota antenna both signals to 3 tvs on 1 coax per tv. I have already in 3 rooms 1 lead, I don't want to make more holes and run other wires, and I want in those rooms to get ota and sat signal in such a way that I can see ota signal even when the sat receiver is on. Thank you.
Is the satellite receiver fed from a multiswitch, or is it direct from the LNB (dish)?
--
CIAO! |
|
| reply to Mark33
Just 1 receiver feed from LNB |
|
egnlsnPremium
join:2003-09-26
Salt Lake City, UT Reviews:
·Digis
| said by Mark33:
Just 1 receiver feed from LNB
Where is the OTA antenna? Is it combined with the cable from the LNB? Are there 2 cables coming into the room where your receiver is; one from the satellite dish/OTA antenna and one that's homerun to a closet or somewhere all of the outlets in the other rooms are run to?
--
CIAO! |
|
| reply to Mark33
In the room where the receiver is come 3 cables; 1 sat, 1 ota and one I guess was used by the previous owner to sent out from the sat receiver signal to other rooms. The ota antenna is on the roof. |
|
eakes
join:2000-10-20
Richardson, TX | reply to Mark33
What you need is a UHF modulator for the satellite receiver (do a Google search on ChannelPlus or UHF modulator).
In the "main" room you have three coaxes - one for satellite, one for the OTA antenna and one going to the other rooms.
Get a UHF modulator. To this device feed an audio/video signal from the satellite receiver. Set the modulator to output on an unused UHF channel. Combine the UHF output from the modulator with the coax from the OTA antenna (you can use a splitter connected 'backwards' to do this). Feed the combined signal to the local TV and also to the other rooms (via the third coax). |
|
| So using a UHF modulator will enable me to watch ota programming on other TVs even when the sat receiver is on? |
|
egnlsnPremium
join:2003-09-26
Salt Lake City, UT Reviews:
·Digis
| said by Mark33:
So using a UHF modulator will enable me to watch ota programming on other TVs even when the sat receiver is on?
Yes. You would connect the A/V outputs of the receiver to the modulator and then connect the modulator to one of the OUT ports of a 2-way splitter. The OTA cable that comes in would connect to a 2-way splitter, with 1 leg going to the sat receiver and the other leg going to the other OUT port of the 2-way splitter that the modulator is connected to. The IN port would then go to the outlet that is homerun to the distribution center where all of the outlets are run to. That cable then connects to the IN of the distribution splitter. Every outlet then has all of the locals plus the sat receiver on whatever channel you modulated it to.
--
CIAO! |
|
| Thank you so much eblcb. I guess this is the way to go. Googleing for UHF modulators I see that ChannelPlus makes also RF mudolators; what is the difference versus UHF modulator? |
|
eakes
join:2000-10-20
Richardson, TX | reply to Mark33
RF modulator is the general term. UHF modulator says which frequency band the RF modulator translates the A/V into.
The channel 3 or 4 RF modulators are VHF modulators. The UHF modulators typically use channels 14 to 65. |
|
egnlsnPremium
join:2003-09-26
Salt Lake City, UT | Most residential modulators can be set to either UHF (channels 14-69) or CATV (channels 65-94, & 100-125). There are several manufacturers.
--
CIAO! |
|
