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Max cable length?

8 REPLIES 8
Nominee

Re: Max cable length?

Fair enough :-)

 

See how @GeoffD 's latest advice works for you, and if need be you can PM him with this link:

https://community.dstv.com/t5/notes/privatenotespage/tab/compose/note-to-user-id/36

 

All the best with it.

New poster

Re: Max cable length?

I dont want to see exposed or conduit cables in my house.

Red Carpet

Re: Max cable length?

Just a  few comments for the time being.

1. You should be able to change which decoder is the primary even if one is on price lock.

2. Connect the Explora 2A to Port A on the SLNB. This port is the main power source for the SLNB, and the Explora 2A can provide up to 1 Amp via its LNB port.

3. Try and route the HB via the LNB cabling, because as you say, the Explora 1 is working perfectly via the diplexer.

4. The benefit of making the Explora 2A the primery is that then the Explora 1 only has to receive HB and not try and amplify and transmit HB over that long distance. There is a "calibration or configuration process thta goes on when activating XV.  That is why you may have to go back to defaults on the decoders before re-activating HB.

5. The location of the Primary decoder is not an issue, except that it would be better if is the one closest to the anteann in terms of cable distance.

 

Octo LNB; 2 by 2x4 MS; 2 by ES 5-2; Dedicated PSU for LNB, ES's, MS's; HD PVR 4P x 2; Explora 1; DSD 660; FSM
Nominee

Re: Max cable length?

Just to add that I'm not assisting anymore, and that MC have indicated they prefer such detail on their forum only be discussed privately via PM due to the abuse others could do with the info.

But wondering why you don't just drill through your walls??

New poster

Re: Max cable length?

Thx for the replies.

 

Update - Routing is over estimated at 80m, should be about 65m. Reason is I have a exposed truss ceiling, hence cannot route cable in the ceiling, it will have to run around the outside of the house.

Moving the dish isnt an option as there are trees all around my house, might consider making way for dish though if I am guaranteed it will work.

So over the weekend I upgraded the PVR to an explora 2, the explora 1 is connected via a Aerial King diplexer and woks 100%. Even with the explora 1 as primary (still on price lock).

 

So... Worth the effort to install another dish at the 3rd location with an explora 2, then send the HB 80m via cable? (As GeoffD mentions its relatively easy) What would this entail? A inline amplifier?

Red Carpet

Re: Max cable length?

Optimist has pretty much covered all the issues. To add:

The Explora 1 used with a diplexer had a limitation of 20 m and a requirement that all other decoders in the mix wanting to route the HB via the SLNB would have to ensure ALL the LNB cables are the same length.

Hence why it is better to make the Explora 2A the Primary decoder in this arrangement.

Next, IF you want extend feeds so far from each other, is to stick to the old way of routing HB, and to install a second antenna with its own SLNB at the far end decoder. It is relatively easy to amplify the HB signal over large distances but more complex to try and do this when it also involves the LNB signals.

 

Octo LNB; 2 by 2x4 MS; 2 by ES 5-2; Dedicated PSU for LNB, ES's, MS's; HD PVR 4P x 2; Explora 1; DSD 660; FSM
Nominee

Re: Max cable length?

(This post was edited a few times for clarity, now done.)

 

Just some basics to offer here and maybe others will chip in as well.

 

Firstly, 3 decoder XV (XtraView) can only work with modern decoders - therefore not possible with the HD PVR(s) included, so only your second option will work.

Only the Explora 1 would need a diplexer. But as per later discussion it's unlikely you'll need that, other sharing and distribution methods are best here.

One of the Explora 2A units needs to be made the Primary, especially with long distances involved which also means it needs to be the decoder in the middle of the property.

 

However, even half of that 80m is going to require some specialist equipment, which I'm not going to get into.

MC (the correct department) recommends up to 50m total for HB (HeartBeat).

But... long LNB signal feeds themselves are more of a concern as they're designed for shorter distances, and HB doesn't work as well via SLNB (Smart LNB).

 

I can't understand who would ever need the distances you're talking.

What we usually suggest for reasonably longer runs is a relocation of the dish so that no single distance is too far, or in extreme cases (but for somewhat shorter than your needs) to use two dishes at both ends of the single property with the Primary decoder in the middle, and only use the conventional HB option on a separate set of RF cables.

New poster

Re: Max cable length?

MC  says 30m via e-mail, and "no maximum length" via thier contact centre...

New poster

Max cable length?

Hi

 

I have a smart lnb connected to a explorer 1. Extraview to hdpvr in bedroom via hb cable. I want to extraview a third decoder (hdpvr)which will require roughly 80m of cabling to get there (due to routing). As I understand, the HB wont travel that far so will have to change setup, no issue with that.

 

Qestions.

1. Can i run a cable from slnb to the hdpvr 80m away and will this work? (no excessive signal loss etc)

2. If above is yes, then I need to install a diplexer at this decoder too...?

 

Option 2

 

Install a explorer 2 in bedroom as main unit, explorer 2 at 80m location as secondary and then normal explorer as third  one in tv room? WIll these then require diplexers? Will this work?