Datasheet

247
4. Earthing and equipotential bonding cables
Technical appendix
EN 50083-1 specifies the following earthing and equipential bonding cables for antenna systems:
Earthing cables:
Material Cross-section Ø Condition Example
Copper > 16 mm
2
> 4.6 mm bare or insulated Koka
Aluminium
Aluminium
> 25 mm
2
> 50 mm
2
> 5.7 mm
> 8.0 mm
bare (indoors only)
or insulated
(wrought) alloy
Steel wire
Steel strip
-
2.5 x 20 mm
8.0 mm
-
galvanized
galvanized
-
-
Cable types: single conductor or multi-conductor, but no fine wires
Equipotential bonding cables:
Material Cross-section Ø Condition Example
Copper 4 mm
2
2.3 mm bare or insulated Koka
Frequency ranges of radio waves
Frequency
range
Int. abb. Abb. Modulation
Picture/
sound
Channel
width
Channels Frequency Wave-
length
Polarisation
Long wave LF L AM 9 kHz 2-4 150 - 285 kHz 2000 - 1050 m V
Medium wave MF M AM 9 kHz 510 - 1605 kHz 590 - 187 m V
Short wave HF K AM 9 kHz 3,95 - 26,1 MHz 76 - 11,5 m V
Band I VHF F I AM FM 7 MHz 2-4 47 - 68 MHz 6,35 - 4,4 m H/V
Band II (radio) VHF UKW FM 300 kHz 2-70 87,5 - 108 MHz 3,4 - 2,8 m H
S-channels VHF USB AM FM 7 MHz s2 - s10 111 - 174 MHz 2,7 - 1,7 m -
1)
Band III VHF F III AM FM 7 MHz 5-12 174 - 230 MHz 1,7 - 1,3 m H/V
S-channels VHF OSB AM FM 7 MHz s11 - s20 230 - 300 MHz 1,3 - 1,0 m -
1)
S-channels UHF ESB AM FM 8 MHz s21 - s38 302 - 446 MHz 99 - 68 cm -
1)
Band IV UHF F IV AM FM 8 MHz 21-39 470 - 622 MHz 64 - 68 cm H/V
Band V UHF F V AM FM 8 MHz 40-60 622 - 790 MHz 48 - 38 cm H/V
-
1) in wideband installation
5. TV standards
1)
Second audio carrier for dual or stereo operation
Standard
No. of lines Channel width
(MHz)
Video band-
width
(MHz)
Video/audio
seperation
(MHz)
Vestigial side-
band
(MHz)
Video
modulation
Audio
modulation
B (CCIR) 625 7 5 + 5.5 (+5.742) 0.75 negative FM, FM
1
D (OIRT) 625 8 6 + 6.5 0.75 negative FM
G (CCIR) 625 8 5 + 5.5 (+5.742) 0.75 negative FM, FM
1
H (B) 625 8 5 + 5.5 1.25 negative FM
I (GB) 625 8 5.5 + 6.0 1.25 negative FM
K (OIRT) 625 8 6 + 6.5 0.75 negative FM
K1 (CCIR) 625 8 6 + 6.5 1.25 negative FM
L (F) 625 8 6 + 6.5 1.25 positive AM
M (FCC) 525 6 4.2 + 4.5 0.75 negative FM
N (South America) 625 6 4.2 + 4.5 0.75 negative FM