User Manual
Manual 505K_1.1
Page 25
3.2.3
Collinear antenna.
A collinear antenna may be used in the same way as a 3 element Yagi to compensate for the
losses in long lengths of coaxial cable. This type of antenna is generally used at a central site
with more than one remote site or at a repeater site. The collinear antenna looks similar to the
dipole, except that it is longer.
3.3
Connection Plug
External power and input signals are connected using a 7-pin weatherproof plug, provided
with the module. The plug needs to be assembled as per the following diagram.
STRAIN RELIEF
CABLE CLAMP
(ONE MOUNDING SPLIT
& USED AS 2 HALVES
O-RING
COVER
LOCKING RING
LINE SOCKET
NOTE: VIEW FROM SOLDER CONNECTION SIDE OF PLUG
DN1
DN2
ANALOGUE
LOOP SUPPLY
GND
EXTERNAL SUPPLY
ANALOGUE IN +
ANALOGUE IN -
505U-K
External supply connection is not required when using the BU-5 battery pack.
For additional protection, we recommend that the plug is wrapped with waterproofing tape.