User's Manual

VHF Headstation & In-Line Amplifiers
User Handbook
Handbook Nō.-50-127201FCC Issue No:-A
Date:-14/06/2005
Page:-
35 of 45
4.12 STPS12045TV 60A Dual Diode Assembly
4.12.1 Description
The purpose of these dual diode assemblies is to allow two (or more) DC voltage sources to
be combined, so that the main 24 volt DC rail within the equipment is sourced from either
the mains driven flat-pack, or externally through an XLR connector on the rear panel. The
heavy-duty diodes prevent any reverse current from flowing back to their source or the
alternative supply rail. Combining diodes such as these will also be used if the equipment is
to be powered from external back-up batteries.
4.13 MT2834ZDXK 56kBPS Modem (96-800003)
4.13.1 Description
The modem used is a standard, 56kBPS, O.E.M, ‘Hayes instruction set’ unit. Used in
conjunction with the Controller/Monitor board it is the output termination of all the alarm
system data which is then transmitted into the regular telephone network by dial up from the
BTS. More information on the set-up & use of the modem can be found in the
Controller/Monitor Handbook (17-006801HBKM).