User Manual

27
MN024-08
Warnings (to be read before the remote units are
installed)
Dealing with optical output ports
The TFAx remote unit contains semiconductor lasers. Invisible laser beams
may be emitted from the optical output ports. Do not look towards the optical
ports while equipment is switched on.
Choosing a proper installation site for the remote units
• TFAx remote units have to be installed as close as possible to the radiating
antennas, in order to minimize coaxial cable length, thus reducing downlink
power loss and uplink noise figure.
TFAx
CaseA
Fig. 3.7 : (a) IEC connector on the rear side of a 220V
ac
-powered case A remote unit. (b)
4-pole connector on the rear side of a -48 V
dc
-powered case A remote unit. These
connectors are not available on TFAM20, which is provided with an external adapter
(see below).
(b)
(a)
Ground
Positive +5 Vdc
(a)
Fig. 3.8 : TPSN external adapters for 220
Vac (a) and -48 Vdc (b) TFAM20
versions. Power supply connector on the
rear side of TFAM20 remote unit (c).
(c)
(b)