stabo xm 3003e, Руководство по эксплуатации

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Antenna connection
Choosing your antenna:
The following applies to CB radio as well: The better the antenna
quality, the greater the range of the radio set.
Make the appropriate choice according to the following recommen-
dations!
Mobile antenna:
A distinction is made between tuned and tuneable antennas.
Tuned antennas should only be mounted on a great metallic sur-
face, as for example on the roof of the vehicle or the trunk lid,
assuring a short connection to ground.
For an antenna which must be fixed by drilling a hole into the car
body, the body sheet must be thoroughly smoothed in order to
assure a reliable positioning of the fixing screws and the sealing
washer!
Be careful not to bend the coaxial cable or to damage it otherwise
by positioning it on sharp edges (for avoiding the risk of short-
circuits!).
Connect the antenna cable to jack (B).
Antenna for stationary radio sets:
When using a stationary antenna, the maximum range of your
radio set is achieved. For outside antennas, the relevant regulations
of the German VDE (Association of German Electrotechnical
Engineers) (with regard to lightning protection!), of constructural
statics and of the building code have to be considered by all means!
In this case, we recommend you to have the antenna system
installed by an expert!
Please refer to the stabo accessories for a comprehensive range
of stationary antennas.
Adapting the antenna
You should not transmit without antenna under any circum-
stances, since this would result in a destruction of the radio
set.
Adapting the antenna means that your antenna is adjusted to the
output resistance of the transmitter, i.e. to 50 W .
The actual characteristic antenna impedance depends on its length
and on its environment of installation. For this reason, the manu-
facturer can only provide you with a roughly tuned antenna. Nor-
mally it is designed such that there is always enough scope left
for adjusting it to the given conditions. In practical operation, this
means that a new antenna is usually too long.
For adapting the antenna, a VSWR resistance bridge (e.g. President
TOS-1, article no. 50004) is connected into the circuit between
the stabo xm 3003e 12/24 V and the antenna and the antenna is
shortened or elongated according to the manufacturer’s information
such that the VSWR on your preferred channel or one of the median
channels is as small as possible. For this, set the radio set to
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