Customer Documentation DEV 2161, DEV 2162, DEV 2165
8
Copyright DEV Systemtechnik GmbH 2011-2017
Note:
It is
highly recommended
to power up the device after the installation of
all RF signal cables (please refer to chapter 4.2.3).
4.2.3
Connection of RF Signal Cables
Please refer to chapter 3.1.1 for the functionality of the different RF signal
connectors on a splitter unit and to chapter 3.2 for the location and naming of
the single splitter units.
Apply strain relieves to the external RF cables which are to be connected in
a way that the connectors of the device are not stressed mechanically.
If the DEV 216x is powered up already and before the RF cables are to be
connected to the chassis, the LNB power (or bias) supply of all splitter units
is to be turned off! Otherwise, there is a risk that a high impulse current
degrades the RF performance of the corresponding input connector.
First, connect the RF input cable(s) (e.g. from the LNB) to the corresponding
input port(s); then connect the RF output cables (to the signal receivers) to
the output ports.
When connecting RF cables to the chassis, each connector is to be
tightened with a torque wrench. The torque applied to 75 Ohm F connectors
should not exceed 4.5 Nm (39.8 lbf-in).
Note:
For the products of this series, female precision F connectors are
applied. Make sure, that the applied connectors are male precision
F connectors (with thin inner conductor).
Each unused output port of a splitter unit has to be terminated with a
75 Ohm F load to achieve best amplitude frequency response.
Recommendation for the output wiring of a splitter unit:
Best signal quality is achieved by connecting the signal receivers
symmetrically to the outputs:
• 1…4 of each 1:4 splitter unit;
• 1…4 and 5…8 of each 1:8 splitter unit;
• 1…4, 5…8, 9…12, and 13…16 of each 1:16 splitter unit;
and
by connecting impedance matched loads to the unused ports.
If all cables are connected, the device can be powered up.
Now the LNB power (or bias) supply can be turned on for the splitter
units that are required to feed power to an LNB.
4.3
MAINTENANCE OF THE PRODUCT
The product is maintenance-free.
Cleaning of the surface of the chassis should be done carefully with a dry
lint-free cloth.