SVP UDR-104, Руководство пользователя

Страница: 153 / 232

UDR-108 Diversity Receiver
MANUAL V0
153
8.2.2 Intermediate Frequency
8.2.2.1 Intermediate Frequency inputs I.F.1 … I.F.8
The connection between the Receiver unit and the down-converter uses a
coaxial cable, whose maximum length depends on the type of coaxial cable
used. If the “Celflex ½” coaxial cable is used, the maximum length is 130m
but if the RG-214 coaxial cable is used, the maximum length is reduced to
80m.
The IF inputs of the Receiver supply DC power to the down-converters.
These connectors should not be manipulated with the
equipment on, and if it is done, it should be done with great
caution.
Intermediate frequency connection technical features
Item Features
Connector Label I.F.1…I.F.8
Connector Type TNC female
Impedance 50Ω
Table 9.4: IF input features – TNC connector (DVB-T2/T)
Item Features
Connector Label I.F.1…I.F.8
Connector Type BNC female
Impedance 75Ω
Table 9.5: IF input features – BNC connector (DVB-T2/T)
8.2.2.2 Lighting Protection
It is recommended to use a lighting protection in the RF and IF segment. The
protection can be installed in the IF input of the Receiver or in the RF input
of the DC. It is suggested to use the Times-Protect® LP-GTV-N series and
LP-GTV-T series.
The LP-GTV-TFM model is used for the IF inputs (TNC connectors).
Figure 9.24: Installation schematic
*Not applicable in case of receiver’s IF inputs with BNC connectors.