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Siemens TC35T GSM Digital Transceiver
8
In a field installation it is recommended that the cable length between the antenna
and the transceiver is kept as short as possible to reduce the signal loss in the cable,
although, as mentioned above, it is often more advantageous to mount the antenna
higher. In some applications the cable will need to be shortened, and so the new
connector can be installed onto the cable at this time by cutting off the surplus
cable, together with the original connector, and fitting the new connector. Ensure
that all connections are well made, and the connector is secured using a crimping
tool or pliers. The connector is only suitable for use in dry environments and so
must be protected from direct exposure to water and precipitation.
Figure 4 ‘Low-cost’ dual-band antenna supplied by Campbell Scientific
The antenna is supplied with a special mounting bracket, as shown, allowing it to
be fitted to 25-27mm diameter horizontal tubing. Alternatively it can be screwed to
a suitable flat surface. The dipole design of the antenna means that
no ground
plane is required
, thus allowing more flexibility in mounting. Avoid mounting the
antenna close to other vertical metal structures or on flat metal surfaces. Higher
gain YAGI style antennas are available from Campbell Scientific to special order.
160mm
approx.
120mm
approx.
Mounting bracket for
25-27mm diameter
tubing