MMDS Set-up Complete Beginner

The first valid centre frequency is 698 mhz with lo 1838.

 

Also I have spoke with Satandcable, and they have told me that the freq quoted are wrong as the supplier has sent aerials with a different LO than those ordered. However all will be fine, just the freq are shifted

 

The 2 metal rod lengths are the Yagi antenna.
It captures the MMDS signal .
Generally its a 22 element Yagi ~21 inches long.
From my experience they are very effective devices and work every bit as well as a grid type aerial.

 

Thanks for all your help , ive still not getting anywhere , all aerials in my area are pointing north , ive tried a scan at those frequencies and the link levels stay steady at 97% but still no transponders , if im right in my understanding because of the lo set as it is what is normally converted to between 220 to 408 is shifted upward and the aerial is converting it to the higher 690 mhz etc , can the eurovox work with that high freq ? ive tried a scan at both polarities .where i live there is nothing blocking my north view infact i can see all of north county Dublin but i just dont know where the transmitter is? any ideas

 

I see that satandcable have now updated the specs on the site confirming the higher output range , at the end they say its eurovox tx compatible , is it just the case the my normal eurovox can work with these output freq ?

 

Yes Eurovox scans between 100M and 870MHz. But it will only work for NTL MMDS. So assuming what has been said is correct and swords in NTL mmds you need to know the correct frequencies for NTL mmds. Have you done a manual scan on every freq from 690MHz upward at intervals of 1MHz?

 

Also do a factory reset on the eurovox and choose the 6887 symbol rate setting. This is used for NTL

 

Thanks , i used 6887 and scanned in steps of 1 from 600 to 900 in both polarities , the link level and quality goes to 97% from 660 to about 850 and then fluctuates down to about 80% afterwards

 

Why intervalls of 1 MHz? The bandwidth is 8 mhz.
2500 minus 1838 give 662 and thats a centre frequency of 666 mhz for the first frequency. The first 4 frequencies are not in use and the fifth has a centre frequency of 698 mhz. The tuner is working with centre frequencies and not starting values.
The first valid freqency should be 698 mhz for Swords via such a aerial.

 

Anyone else shed any light on this problem? sounds like the signal is ok?

heres a list of frequencies by the way:

Channel Frequency
======= =========
RTE One 306000
RTE Two 306000
TV3 306000
TG4 306000
City Channel 258000
Channel 6 354000
BBC1 322000
BBC2 322000
BBC3 370000
BBC4 370000
CBBC 370000
Cbeebies 370000
BBC News 24 370000
BBC World 370000
UTV 322000
Channel 4 322000
E4 306000
E4+1 354000
More4 354000
Sky One 322000
Sky Two 322000
Sky News 338000
CNN 386000
CNBC 258000
UKTV Gold 386000
Dave 258000
Bravo 306000
Living TV 306000
Paramount Comedy 306000
Paramount 2 338000
Hallmark 386000
Reality TV 354000
E! 386000
Discovery 290000
Discovery Civiliastion 290000
Disc. Real Time 290000
History Channel 306000
National Geographic 274000
Animal Planet 290000
Biography Channel 306000
Travel & Adventure 290000
Performance 322000
Virgin 1 290000
TV5 258000
EWTN 322000
Sky Premiere 274000
Sky Premiere + 1 274000
Sky Comedy 338000
Sky Action 338000
Sky Family 338000
Sky Drama 338000
Sky Sci-Fi/Horror 338000
Sky Classics 338000
Sky Modern 274000
Sky Indie 338000
MGM Movies 370000
TCM 290000
Film Four 354000
Film Four + 1 354000
PPV Channel 290000
Disney Channel 258000
Disney Cinemagic 258000
Disney Cinemagic + 1 258000
Playhouse Disney 258000
Cartoon Network 386000
Nickelodeon 370000
Nick Junior 274000
Boomerang 386000
Toonami 386000
MTV 370000
MTV Hits 274000
MTV Dance 370000
VH1 370000
The Music Factory 370000
RTE Two The Den 306000
Epg Video 258000
Sky Sports 386000
Sky Sports 2 354000
Sky Sports 3 354000
Sky Sports Xtra 274000
Sky Sports News 386000
PPV Football 290000
MUTV 290000
Setanta Ireland 258000
Setanta Sports 1 274000
Setanta Golf 274000
Eurosport 290000
NASN 370000
Extreme Sports 338000
At The Races 322000
The Adult Channel 354000
Playboy 322000

All will be +440MHz

 

Things seem to be moving in the right direct , Thanks mgb17 , but not there yet. on a manual entering at 698 the eurovox locks on to the transponder after about 4 seconds and so on in steps of eight but seems to loose its lock then get it back again. So im thinking that its may be a power issue or do i need to boost the signal before putting it to the eurovox or is it simply my alignment and aerial height ,i would also say that its not finding any channels on those transponders it locks onto as the lock comes and then goes..

 

The MMDS adaptor has an output of 18v 0.3A does this have a bearing on the issue?

 

Adjust your aerial via the signal numbers at 698 mhz.

 

If the lock comes and goes you do not have a strong enough signal.
Your aerial needs to be realigned.
The adaptor will work fine,I've powered Yagis off +12v.

 

Thanks everybody for their help , today at least for a while a got some stations , so i know that it works , but my setup for the aerial is slap dash and i think i'll need to have it properly mounted on the chimney and aligned

 

Hi All,

have been reading with interest so far. I plan to use a dm600T for the digital mmds transmitter in ballyduff, gorey in wexford.
Will the mmds antenna that was shown in the link http://www.satandcable.co.uk/s/product_info.php?cPath=44&products_id=83
work here?
Is the 600T the right box for all mmds or is the cable tuner also used?
Whats the best image to use and where can I find it? Will I have to install the keys seperately or are they available allready in the image? Does the 600T autoroll the keys like the 500c?
Sorry for all the questions guys but just wanted to make sure I have everything covered so I can crack on with it.

Thanks in advance for any help that will be graciously received!

 

well its been a rollercoaster but i have to say after lots of trial and error i'am up and running but with one question that i'll leave till the end. what i will tell you might sound not real but actulauly works for the all in one aerial om satancable. It needs a reflective layer underneath the yagi(the screw like extensions) tin foil works reflective side under the aerial, now what if found is that if you on the the second element of the yagi(atennenta) which is like an arcemides screw you rest an alumiunium peice of metel from there to the housing pointing vertical the qaulity is just perfect. I have received over 84 chanells on the NTL 6887 symbol rate by just having the aerail in my loft yet i live in a chorus cable area .

Now for the puzzle i can get every transpoer at a level of over 86% but 698 mhz which is 258 mhz in normal it has disappered every other transponer comes in with a level of over 86% , the channels on this freq are disney etc but i cant see why all the others work. I had a fulll signal on 698mhz the other day now its gone im in swords but i have yo say i'm puzzelled why that transponder has gone , has it moved , i asked a friend in lusk tonight on mmds what it was incoming on and they told me 258.

So any ideas? oh and as as add on if you hvae wireless broadband near your arerial which i have in my loft it causes a disturtance(pixelation etc)

Well if anybody can help me on the disney channles is would be great.

Thanks everbody Mgb17 and fano please tell me why that the extra piece of metel rested as i said with the foil works????

 

The tin foil is acting as a focus for the microwave signal.
I have made wifi boosters out of cardboard covered in tin foil and placed it behind the aerial of a router.
Ex here http://www.freeantennas.com/projects/template2/index.html
Ideally you shouldnt need the tin foil but as you are inside the loft I guess the signal might not be too strong there.
This is what the structure of an mmds yagi looks like.
http://www.wireless-homebrew.com/wireless/pics/cal_amp_22.png
The wifi router operates at ~2.4Ghz and the MMDS ~2.5ghz so there will be intereference.
The Disney transponder might be weaker than the others so you may have difficulty picking it up.

 

For Dreambox clone in using the Downconverter with integrated power supply as advertised on this site one should be able to pick up the channels which the standard downconverter operating at 222MHZ - 408MHZ cannot pick up due to a problem with these boxes. To get all the channels will I have to manually enter in all the frequencies from 698 up ?

 

You can use a modified terrestrial.xml file or a manual scan from 674-840 in 8 Mhz steps.
For the price SatandCable are charging they should give an installation guide.
The Yagis they are selling are cheap Chinese models far inferior to the better Chinese models and those made by Cal Amp.