2 x 'RF Out 2' combined in to 1 TV Coaxial (RG6) Distribution

[PJD]

Looking at my frequencies http://www.aerialsandtv.com/suttoncoldfieldtx.html It seems which ever filter I purchase will have an affect on the frequency, there is no band pass filter I can buy which does not fall in to the frequencies that are transmitted, does this mean which ever filter I buy will have an impact on my Freeview channels?

[ramjet]

a bandpass filter allows through the channels it mentions, which is what you want

so what you seek to do is suppress the channels from the aerial outside of the channels it lets through, leaving them free for use internally and protected from outside interference

so the bandpass filter would be fitted on the actual aerial coax cable as it comes into the first device, suppressing the channels you wish to use internally

[PJD]

Okay so if I am following you correctly a Group A Ch 21-37 filter should suffice on my set up then, I can leave the Sat on Channel 21 and retune the Sky to something like Channel 30

[ramjet]

a type B seems correct to me, read this from the am*zon description

Product Description

The OPTIMA OBF3453 is an Indoor Channel Grouped Band-Pass Filter. Group B for Ch34-53 (574 - 743Mhz)

The RF spectrum is filling up fast. With GSM, TETRA, PMR, LTE (4G) and forthcoming "white spaces" transmissions likely to cause interference it is even more important to properly filter the input to a TV aerial installation and signal distribution system. Un-filtered installations are likely to suffer from the effects of interference causing unreliable reception and disturbed viewing. OPTIMA filters are designed to remove unwanted frequencies from the aerial system.

To choose the right filter, establish the range of channels required (lowest and highest channel number) from your local TV transmitter and choose the nearest filter covering that channel group.

High Out-of-Band rejection >-30dB typical Low In-Band insertion loss -30dB @ 800MHz LTE band rejection: >-25dB @ 791MHz LTE band rejection: >-45dB @ 821MHz Label Indication colour: Yellow Connectors: F - female type DC Pass: DC Blocked Dimensions: 82 x 34 x 18mm Weight: 60g , The OPTIMA OBF3453 is an Indoor Channel Grouped Band-Pass Filter.

this passes the channels between ch34 to ch53 , blocking the lower and upper rf channels and your an*logue rf channels for sly and the sat box are on say 21 and 30, the lower part of the spectrum , so below ch34 which the filter is protecting (like a firewall)

but your freeview channels seem to go from ch33 to ch46 , so the 33 (mux 7) may be affected quite a lot so you could try a K and move the 2 rf channels to above 47 but below 60 , so 48 to 59 as digicon said earlier

a group A would block your higher muxes so cannot be correct

[PJD]

Thanks for bearing with me guys, its quite confusing, although I think I have grasped it.

The Group A would not be any good as it lets through Ch 21-37 now seeing as my channels go from 33-46 it would only let through channels 33 & 35 and block out the rest,
If I installed a a Group B Ch 34-53, it would let through all my channels except for Ch 33
So by installing a Group K 21-48, it would let through channels 21-48 meaning all the channels would get through and if I re-tuned the Sat & Sky to channels 50 & 58 everything would be rosey

I cant seem to find any Group K Band pass filters though

[digicon]

Its hard you want to try living in an area where your channels start at 31 and end at 58 LOL

[PJD]

Bet that causes you all kind of issues

[ramjet]

if you installed a B type filter you can see what channels are affected on mux 7 (com 7) on here

https://ukfree.tv/transmitters/tv/Sutton_Coldfield

as its rf channel 33 then you may find they still work even on reduced signal, or the filter may not be as bad seeing as its only 1 rf channel out from the 34 pass channel

alternatively , if you can do without those affected channels then a B type would suffice as it would allow the other 7 muxes to operate normally

[PJD]

Thanks for your reply, I'll get a B type filter ordered


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[PJD]

I fitted the Type B Filter this morning, still no difference

[PJD]

Going to give this thread a bit of a bump,

I had another replacment Labgear MRX600K I/O link sent out, I have fitted this with the freeview connected, i went through every channel 1 by 1 and found the 2 best channels which were 24 & 69
Still cant get a brilliant picture, is there anything else i can do to boost the picture? I already have a Type B filter fitted
If i loose the freeview coax then the picture quality becomes perfect, but I dont want to do this as a permant solution

Also 1 last piece of information, the MRX600K puts out 9v from the RF2 out, should it not put out 12v? could this be the reason the picture quality is not very good?

[PJD]

I think I'm starting to have a bit of luck with this now.

I have spent many more hours on this playing with it and trying different things.

I have a 3rd replacment I/O link fitted
I have the Type B filter on,
I found some loose connections which I corrected,
I also got rid of the splitter from the Freeview and have the downstairs TV connected up from the RF1 from the RF Modulator for the freeview.

I have found 1 good channel 65 I am running the Sky box from this, I am still having trouble finding a good channel for the Sat box though,
I have just ordered a decent Scart lead to connect the Sat box to the Rf modulator just incase the cheap 1 is picking up some interference.

Its such a slow process keep trying different things, now I have the tv downstairs connected up from the RF1 it has made the job easier for testing channels, saves me keep going up 2 flights of stairs every time i want to try it.

I feel like I am making progress though

[PJD]

Well 2 months down the line and I have finally resolved this issue.

I purchased a Variable Attenuator and swapped it with the band pass Filter I had fitted......Problem solved, Got crystal clear picture on both the Sky and satalite channels that are broadcast over RF

I have no problems with it at all, took me many many hours but got there in the end

I would just like to thank the guys that did help me out, it was much appreated and helped me out big time