User Manual
CO1-2 Combiner
Page 9 of 36
2. GENERAL INFORMATION
2.1 Power supply.
The Combiner is powered by an external source of 13.8 V DC
nominal (15.5 V DC
max).
Considering the low current required (1 A max.), the transceiver power supply can be
used.
This voltage is shown on the "PORT OUT" connector in order to supply the antenna
switch (optional).
There is a slow 1 A fuse inside the Combiner.
2.2 External Ground Connection (Gnd).
WARNING!
Before connecting an external ground as described below, check with
a qualified electrician that your national wiring codes a connection.
To reduce TVI, BCI and other RF problems it is best to connect the amplifier to a good
RF ground. (Note that an RF ground is different to an electrical ground which is
necessary for the prevention of electrical shock).
The inductance of such a connection needs to be low, so the connection to ground
should be as short and direct as possible.
Large-section copper conductors should be used for this purpose.
It is recommended to terminate the earth connection with a small metal plate.
The best solution is to have several ground stakes, driven into the ground, and these
ground stakes also need to be tied to your main grounds.
Good results can often be achieved by using correct earthing clamps, connected to the
main water supply pipe (note, many water pipes are now made out of plastic).
DO NOT use central heating pipe work.
AVOID the electric circuit ground of the building (to be used for 50/60 Hz safety only).
WARNING! DO NOT connect to gas pipes as there will be a danger of
explosion!!
2.3 Kit Cables (option).
A cable kit can be provided to connect between the two amplifiers and the Combiner;
each cable is long enough to place the three devices stacked or side by side.
For other provisions involving longer lengths refer to the chapters below.
The Kit consists of n. 6 cables (see page 6):
n.1 PORT Cable, n.1 CAT Cable, n. 2 x COMBINER Cable, n. 2 x SPLITTER Cable.
The CAT Cable, for construction reasons, is supplied in two versions to choose from
when ordering:
CAT Cable / CAT for connection to all CATs.
CAT Cable / Band Data for the "BAND DATA" connection.
