Television Reception Guide - Multi Carrier Mauritius Ltd

Multi Carrier (Mauritius) Ltd
Television Reception Guide
The following is intended to be an informative guide to terrestrial television reception.
It is highly recommended that you contact an antenna professional for the proper
installation of a terrestrial TV antenna system.
General guidelines for better television reception:
Locating the relay stations
Frequency Bands for Terrestrial Television Broadcasting
Choice of TV Antenna
Antenna placement and positioning
Cabling and distribution
Notes on Digital Terrestrial Television Reception
Maintenance of antenna system installation
Analogue Television Transmission in Mauritius – SECAM B/G in the VHF/UHF bands
1. Locating the relay stations
The first step in planning a television antenna installation is to find out the location of
the transmitting station intended for your area. MCML has a national network of
stations that covers all the populated regions of the island. Television signals, especially
UHF signals travel in straight lines and are obstructed by major obstacles in the
landscape such as mountains and tall buildings. Table A below is a guide for locating the
appropriate relay station covering your region.
Table A : Locating the relay station covering your area
Station
Centre
North
Corps de
Garde
Intended coverage areas
Curepipe, Castel, Phoenix, Quatre-Bornes, Belle
Rose, Rose-Hill, Beau-Bassin, Reduit, Moka, StPierre, Q-Militaire, Vacoas, Floreal, Henrietta, La
Marie, Forest-Side, Nouvelle France, Rose-Belle,
Plaine-Magnien, Mahebourg and their nearby
regions.
Corps de Garde, Ave Berthaud, Palma, Sodnac and
their surroundings.
Butte aux
Grand Baie, The Vale, Goodlands, Pereybere, Riv du
Malherbes
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Port
Louis
Papayes
Rempart, Petit Raffray, Grand Gaube, Trou aux
Biches, Fond du Sac and nearby regions.
Montagne
Signaux
Port Louis, Cassis, Caudan, Marie Reine de la Paix,
Belle Village, Coromandel, Pamplemousses, RocheBois, Ste Croix, Cite la Cure
Citadelle, Valle Pitot, Plaine Verte
Pailles, Les Guibies
Terre Rouge, Vallee des Pretres, Arsenal, Carreaux
Lalo
Citadelle
Coromandel
Terre Rouge
South
Jurançon
Baie du Cap
Chamarel
Surinam, Chemin Grenier, St Felix, Riv Des Anguilles,
Riambel, Bel Ombre, Souillac and nearby regions.
Baie du Cap, Choisy, Maconde
Chamarel Village
West
Le Morne
Le Morne, La Gaulette, Case Noyale, La Preneuse, la
Mivoie, Wolmar and nearby regions.
East
Motte à
Thérèse
Lallmatie, St Julien Village, Constance, Centre de
Flacq, Brisee Verdiere, Mare la Chaux, Camp Ithier,
l'Aventure, and nearby regions
Quatre Soeurs, Deux freres, Bambous Virieux
Pointe du
Diable
Pointe Jérome Pte Jerome, Pte d'Esny, Bois des Amourettes, Quatre
Soeurs, Deux Freres
Riche en Eau Riche en Eau, St Hurbert, St Hilaire
Bel Air
Bel Air
Rivière Séche
GRSE
GRSE, Beau Champ
2. Frequency Bands for Terrestrial Television Broadcasting
The next step is to determine the radio frequency band that is used by your relay station
for broadcasting. The band of frequencies used by your station will be an important
factor to choose the right type of antenna.
Table B shows the range of frequencies used for television broadcasting in Mauritius
and Rodrigues.
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Table B: Frequency Bands for Mauritius and Rodrigues
Band
Name
Channels
I
III
IV
V
VHF-LOW
VHF-HIGH
UHF
UHF
2-4
5-12
21-37
38-69
Channel
width
7 MHz
7 MHz
8 MHz
8 MHz
Frequency Range
47 - 68 MHz
174 - 230 MHz
470 - 582 MHz
582 - 862 MHz
TV TRANSMISSION - SECAM B/G (ANALOGUE) - DVB-T (DIGITAL)
Nº
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
STATIONS
CH
Baie du Cap
48
Bel Air
61
Butte aux Papayes 12
Chamarel
41
Citadelle
48
Coromandel
Corps de Garde
31
G.R.S.E.
Jurançon
09
Le Morne
08
Les Mariannes
Malherbes
04
Mont Simonet
Motte Thérèse
09
Plaine Paul
Pointe du Diable
31
Pointe Jerome
12V
Riche en Eau
45
Signal Mountain
07
Terre Rouge
59
MBC 1
F (MHz) Watts
687.25 0010
791.25 0050
224.25 0100
631.25 0050
687.25 0010
CH
57
58
49
54
51
61
52
61
29
49V
MBC 3
F (MHz)
759.25
767.25
695.25
735.25
711.25
791.25
719.25
791.25
535.25
695.25
62.25 5000 24 495.25 2000 27
519.25
203.25 0100 33 567.25 0200 36
591.25
551.25
224.25
663.25
189.25
775.25
599.25
703.25
711.25
535.25
751.25
CH
45
64
40
51
09
58
551.25 0020 34
58
203.25 0200 32
196.25 0100 40V
0100
0100
0050
0200
0010
34
41V
48
32
62
MBC 2
F (MHz) Watts
663.25 0010
815.25 0050
623.25 0200
711.25 0050
203.25 0010
767.25 0030
575.25 0020
767.25 0100
559.25 0200
623.25 0100
575.25
631.25
687.25
559.25
799.25
0100
0100
0050
0200
0010
37
50V
51
29
56
DTV MUX 1
Watts CH F (MHz) Watts
0010 53
730
010
0050 57
762
010
0200 48
690
025
0050 55
746
010
0010 54
738
010
0030 57
762
010
0020 53
730
010
0100 57
762
010
0200 30
546
025
0200 50
706
050
58
770
010
2000 28
530
250
48
690
025
0200 37
602
025
48
690
025
0100 38
610
010
0200 51
714
025
0050 52
722
010
0200 30
546
025
0050 57
762
010
DTV MUX 2
CH F (MHz) Watts
50 706 025
60 786 025
43 650 050
40 626 010
55 746 025
60 786 025
49 698 010
55 746 025
34 578 025
43 650 050
55 746 010
22 482 250
45 666 025
31 554 050
45 666 025
30 546 025
42 642 050
44 658 025
34 578 050
60 786 025
DTV MUX 3
CH F (MHz) Watts
51 714
50
48 690
25
46 674
50
57 762
25
52 722
25
55 746
25
36 594
25
48 690
25
35 586
50
46 674
50
53 730
25
21 474
250
39
55
36
44
41
35
58
618
746
594
658
634
586
770
50
25
25
50
25
50
25
RODRIGUES
Nº
1
2
Digital TV
CH F (MHz) Watts
Stations
Citronelle
Malartic
8
198.50
65
Radio
AM
MBC 1206 K 1 KW
FM
500
W
MBC 97.3 M
500
3
4
5
6
7
Mont Venus
Mont Cheri
Papayes
Sygangue
Trèfles
*
6
6
10
10
10
184.5
184.50
212.50
212.50
212.50
25
25
25
25
50
RFI
93.2 M
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W
3. Choice of Antenna
Selecting the right type of antenna is an important factor to ensure good quality of
television reception. The following factors can influence the choice for an appropriate
antenna.
•
•
•
Channel frequencies broadcasted by the relay station
Signal strength in your area
Presence of major obstacles in the path between your antenna and the relay
station
4. Antenna placement and positioning
Once the antenna has been chosen, it should be placed in a location where maximum
signal strength is obtained.
•
•
•
•
The antenna must be pointed towards the relay station
The antenna should be mounted horizontally for all relay stations except for Le
Morne & Pte Jerome where the antenna should be mounted vertically.
The antenna should be installed clear of obstacles for example buildings, walls,
trees, etc. for good reception.
Multiple antennas should not be stacked on a single stand-off pole close to each
other. Maintain a distance of at least 50 cm between them.
5. Cabling and distribution
A low loss coaxial cable (impedance of 75 ohms) is recommended for distributing the
signal to the receiver. For distributing the signal to more than one television set, a
splitter may be used, however a distribution amplifier may be required if the received
signal is low.
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6. Note on Digital Terrestrial Television Reception
Digital terrestrial television eliminates most of the reception problems of analogue
broadcast television such as snowy pictures and ghosting. However like all digital
systems, if the signal received is near the minimum threshold, you may get frequent
interruptions or no reception at all. To ensure a stable reception, make sure that your
antenna system receives a good quality signal comfortably above the minimum level as
indicated by the set top box.
7. Maintenance of installation
The antenna installation must be inspected from time to time to detect signs of
corrosion or damage. Bad weather conditions, like rain and strong winds can decrease
the lifetime of the antenna and cabling.
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