|
MMDS Set-up Complete Beginner
|
|
|
alec76
Junior Member
|
21. January 2008 @ 15:00 |
Link to this message
|
|
btw C****S MMDS tralee area--is it dvb-t or dvb-c or analog ?
|
|
Advertisement
|
 |
|
|
|
bcashion
Member
|
24. January 2008 @ 16:17 |
Link to this message
|
HI All,
Will that antenna with the power supply and the down convertor work for chorus MMDS analogue? My parents live in ashbourne co meath and I was going to buy it for them with the eurovox TX. Money is tight after Xmas so I don't want to go splashing out for this if it won't work?
Anyone any ideas how many channels you will get with this setup.
Will it pick S** Movi** etc.
Thanks
Sham
|
|
gracem
Junior Member
|
25. January 2008 @ 12:42 |
Link to this message
|
Hi , bought this aerial , http://www.satandcable.co.uk/s/product_i...&products_id=83
Cant seem to pick up NTL in Swords on it , i know they use NTL mmds by the airport and in nearby lusk and its works on any eurovox. Im getting good levels of 85% to 95% but no transponders on a scan .Can anyone help do i need the new tx box?
|
|
claret08
Suspended due to non-functional email address
|
25. January 2008 @ 15:58 |
Link to this message
|
What box are you using? if it is a eurovox have you used power scan on full. Also you need may need to do a factory reset, when you do this make sure the default you choose is symbol rate 6887 for N*L.
|
|
claret08
Suspended due to non-functional email address
|
25. January 2008 @ 16:04 |
Link to this message
|
|
I think Swords is actually Chorus MMDS, can someone confirm? Then you would need the TX
|
|
bcashion
Member
|
26. January 2008 @ 05:55 |
Link to this message
|
I am 99% sure that Swords is chorus MMDS.
Some parts of it are digital MMDS though.
If its analogue, i.e you don't have a digibox in your house just a cable coming in you will need the TX.
Let me know how you get on as I am going to buy the aerial and TX box next week.
good Luck.
|
|
mgb17
Senior Member
|
26. January 2008 @ 10:16 |
Link to this message
|
|
There is no chorus mmds in Swords.
There is either chorus true cable or ntl mmds.
|
|
gracem
Junior Member
|
26. January 2008 @ 12:18 |
Link to this message
|
This is the aerial specs , i mounted it on the roof , should it pick up the NTL mmds, fano has mentioned yagi but all i got is what you see in the pick the downcoverter , power supply , and the two screw like antenna ,any ideas
http://cgi.ebay.ie/MMDS-TV-Aerial-Antenn...1QQcmdZViewItem
all-in-one MMDS aerial, downconverter. Also includes power supply (18v) and fixing bracket.
This aerial needs to be pole mounted
Gain options: 55dB
Input frequency: 2,150 - 2,162MHz / 2500~2686MHz
Output frequency: 116 - 128MHz / 222 - 408MHz
Gain stability over temp.: ±2dB
Gain flatness: +/-0.1dB@6MHz
+/-1.5dB@116-128MHz
+/-1.5dB@222-408MHz
+/-1.5dB@whole band
Noise figure: 2.5dB±0.5dB
VSWR: 1.5:1
LO frequency: 1,838MHz, 1,950MHz, 2278MHz or as per requests
LO frequency stability: ±25kHz over temp
LO phase noise -92dBc/Hz@10kHz
-99dBc/Hz@100kHz
LO leakage IF port: <-45dBm
LO leakage antenna port: <-60dBm
Image rejection >80dB
IF rejection >80dB
PCS rejection: >100dB
WCS rejection: >80dB
Spurious in IF band: <-100dBm
Output impedance: 75 ohms
Output connector: F-type female
Supply voltage: +12 VDC to +24 VDC
Temperature: -40 to +70°C
Humidity 100% weatherproof
Lighting protection
Surge protection: meets or exceeds IEEE specifications
BRAND NEW AND BOXED
|
|
mgb17
Senior Member
|
26. January 2008 @ 12:28 |
Link to this message
|
|
Check the direction of the mmds arials in the neighbourhood.
Check if you use the right output. It looks like there are two.
Try 258 mhz for the scan.
|
|
gracem
Junior Member
|
26. January 2008 @ 12:50 |
Link to this message
|
|
how do i check the output , this may sound silly but there's only a connection for the cable on the downconverter to the power supply.thanks for your help
|
|
gracem
Junior Member
|
26. January 2008 @ 13:05 |
Link to this message
|
I dont know if this helps but the box has marked the gain as 37dB and the LO(mhz) 1838
|
|
Fano
Member
|
26. January 2008 @ 13:10 |
Link to this message
|
Originally posted by gracem:
I dont know if this helps but the box has marked the gain as 37dB and the LO(mhz) 1838
It says on the ebay description that Output frequency: 116 - 128MHz / 222 - 408MHz ,thats bullshit.Its just cut and paste off elsewhere.
It should be 662-848Mhz,if the Lo is 1838.
Try scanning at 674mhz up to 700mhz in 1 mhz steps.
This message has been edited since posting. Last time this message was edited on 26. January 2008 @ 13:14
|
|
bcashion
Member
|
26. January 2008 @ 14:35 |
Link to this message
|
There are still some apartments in swords that have analogue MMDS, I know a guy who has it as I sold him a eurovox max v and it wouldnt work, ntl confirmed that it was chorus mmds...
|
|
mgb17
Senior Member
|
26. January 2008 @ 15:18 |
Link to this message
|
Originally posted by bcashion:
There are still some apartments in swords that have analogue MMDS, I know a guy who has it as I sold him a eurovox max v and it wouldnt work, ntl confirmed that it was chorus mmds...
NTL got the mmds licence for the Dublin region and around some years ago. There is simply no chorus mmds transmitter.
|
|
claret08
Suspended due to non-functional email address
|
26. January 2008 @ 16:27 |
Link to this message
|
Fano is right the frequency is shifted with the LO of 1838MHz. Just means that you need to do a full power scan on the Eurovox and it should be fine. Make sure you do a full power scan or manual scan of all freq from 682MHz upward, 674MHz is not used anymore
|
|
mgb17
Senior Member
|
26. January 2008 @ 16:34 |
Link to this message
|
|
The first valid centre frequency is 698 mhz with lo 1838.
|
|
claret08
Suspended due to non-functional email address
|
26. January 2008 @ 16:36 |
Link to this message
|
|
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
|
|
Fano
Member
|
26. January 2008 @ 17:55 |
Link to this message
|
Originally posted by gracem:
fano has mentioned yagi but all i got is what you see in the pick the downcoverter , power supply , and the two screw like antenna
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.
|
|
gracem
Junior Member
|
27. January 2008 @ 11:54 |
Link to this message
|
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
|
|
gracem
Junior Member
|
27. January 2008 @ 12:10 |
Link to this message
|
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 ?
|
|
claret08
Suspended due to non-functional email address
|
27. January 2008 @ 12:13 |
Link to this message
|
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?
|
|
claret08
Suspended due to non-functional email address
|
27. January 2008 @ 12:16 |
Link to this message
|
Also do a factory reset on the eurovox and choose the 6887 symbol rate setting. This is used for NTL
|
|
gracem
Junior Member
|
27. January 2008 @ 12:23 |
Link to this message
|
|
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
|
|
mgb17
Senior Member
|
27. January 2008 @ 12:28 |
Link to this message
|
|
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.
|
|
Advertisement
|
|
|
|
claret08
Suspended due to non-functional email address
|
27. January 2008 @ 12:31 |
Link to this message
|
|
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
|
