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DVB-T2 switch-off: which Cavel cables to choose to avoid interference

Focus On: DVB-T2

DVB-T2 switch-off: which Cavel cables to choose to avoid interference

The implementation of the DVB-T2 standard and future 5G services requires a revision of the TV reception system. The installer's task is also to seriously evaluate the replacement of the coaxial cable with one of adequate quality, such as the Cavel® models described in these pages, to avoid interference and ensure work in a workmanlike manner.

 

  DVB T2 cav  

  With the shutdown of the DVB-T standard, another portion of the UHF band is sold to telephone operators. We are talking about the 700 MHz band which within the next 2-3 years will be entirely dedicated throughout Europe to 5G services. The UHF channels dedicated to 4G / 5G services will therefore extend from 50 to 69.

This fact brings to the fore the attenuation of the shielding of a reception system and, above all, that of the coaxial cable used for cabling.
For decades we have talked about the importance of choosing quality cables and connectors to achieve reliability over time, even in critical conditions especially considering their low cost compared to the total cost of the system. Today more than ever we need to install high quality cables

Parameters that must be kept in mind
Today, the shielding attenuation becomes an even more important parameter than other more usual ones such as attenuation and cumulative return losses.
A quality coaxial cable stands out for its ability to slightly attenuate the signal; but with the interfering signals of the 5G / 4G base stations the screen, understood as the union of the braid and the single or double film, takes on a decisive role to prevent interference from reaching the internal conductor of the coaxial cable and, therefore, the TV signal distributed in the system.

 

The Cavel® range of coaxial cables in Class A, A + and A ++ 
WsitchOff ChooseToday, the differentiated use of the type of coaxial cable is widespread, depending on the section to be wired; in the future it could be even more so. Thus, for example, any wiring to be made between the receiving antenna and the switchboard, from a pole or from inside, should be made with a coaxial cable such as the DG100 and DG113 with class A + shielding efficiency or, even in the most difficult cases with RP 913B, in class A ++. This is because it is essential to ensure the reception system maximum protection from present and future 5G / 4G signals, not being able to know in advance at what distance and with how much power the radio base station next to the system will transmit. Inside the building, in the attic, the structure already offers a small screen: provided that the radio base station is not positioned on the same roof of the building or near it, you can opt for a cable such as DG 70 or DG 80.


Even in the home, the 4G / 5G signals of a smartphone or tablet can interfere in the reception system: for this it is essential to use custom-made TV extensions with Cavel® cables and connectors.
There are 11 video tutorials available to readers:

Cavel® offers a series of cables with differentiated degrees of shielding to protect the system even in every part of the house. They range from models DG 70 and DG 80 in class A, for mounting on the floor and indoors, to pass to DG 100 and DG 113 in class A +, to be mounted on the backbones and outdoors, up to RP 913B in class A ++, for the most difficult cases

 

 CAVEL®
 COAXIAL
 CABLES


CONSTRUCTION DATA ELECTRICAL DATA
Inner
conductor

Dielectric  


Screening


Braid


Outer
Sheath

Minimum
Bending radius

(mm)  
Insertion loss
(dB/100 m)

SRL
(dB)


Screening

Attenuation
(dB)


Material Dia. (mm) Material Dia. (mm) Material Coverage (%) Material Coverage
(%)
Dia. (mm) Dia. (mm) Single Multiple  a470 MHz a862 MHz a2150 MHz 470-1000 MHz(dB) 1000-2000 MHz(dB) Classe 30-1000 MHz(dB)
 DG70*     Cu  0,70  PEG  2,90 Al/Pet/Al  100 %  CuSn  73 %  3,40  4,30  20  40 20,20 27,80 45,00  >28  >26  A  >90
 DG80**   Cu  0,80  PEG  3,50 Al/Pet/Al  100 %  CuSn  65 %  4,00  5,00  25  50 16,80 23,00 37,40  >28  >26  A  >90
 DG100     Cu  1,00  PEG  4,30 Al/Pet/Al  100 %  CuSn  76 %  4,80  6,00  30  60 14,00 19,20 31,10  >28  >26  A+  >100
  DG113**  Cu  1,13  PEG  4,80 Al/Pet/Al  100 %  CuSn  72 %  5,30  6,60  35  70 12,40 17,10 27,90  >28  >26  A+  >95
 RP913      Cu  1,13  PEG  4,80 Al/Pet  100 %  CuSn  71 %  5,35  6,60  35  70 12,60 17,30 28,80  >28  >26  A++  >105
 * Also available with sheath with longitudinal colored bands
 ** Also available with sheath with longitudinal colored bands or LSZH Sheath