Technical Manual

TLA 852/FLA 872
TM1205 Issue 2Page 1 - 2
1.1 INTRODUCTION
The MultitoneTLA 852 and FLA 872 Radio Paging Receivers are VHF receivers
which receive messages sent in CCIR Radiopaging Code No.1 (RPC1).
The front panel of the unit has a Liquid Crystal Display (LCD) to display messages
and other information. The three buttons on the front panel are used to control the
functions of the unit.
The LCD of the TLA 852 can show a maximum of two lines of 20 alphanumeric
characters; the FLA 872 has the option of showing a maximum of four lines of 20
characters, or two lines of double height characters. The displays can also show a
maximum of seven symbols in a line.
If the TLA 852 receives a message that is longer than 40 characters, it displays the
first 40 and stores the excess. The front panel buttons are used to transfer the
stored part of the message to the screen as required. Similarly, if the FLA 872
receives a message which has more than 80 characters (40 characters in double
height mode) the excess characters are stored.
Message alert is provided by an audible beep tone or by the unit vibrating. The
buttons are used to select the preferred alert.
Power for the unit is supplied by a single AAA battery. A door on the rear of the unit
gives access to the battery.
A back-up supply for the unit is available when the battery is changed. The back-up
supply is provided by a large-value capacitor mounted on the decoder board in the
unit. The capacitor, when fully charged, can maintain data in the unit for more than
5 minutes.
The unit case is a two-piece plastic moulding secured by two cross-head screws. A
lanyard is supplied with the unit which can be fastened to the case and the attached
clip used to secure the unit to a suitable object.