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Introduction
The E-969 Encoder is full function, easy to use activation unit for Whelen’s family of High Power Voice and
Siren System products. The E-969 output is Whelen’s standard, reliable 10 digit DTMF protocol.
The E-969 is an attractive, desktop unit designed for simple connection to a base station transmitter. The
E-969 has a sealed membrane keypad and low power liquid crystal display. The warning activation
sequence consists of:
1.
Select a
Command Group
2.
Scroll
to the desired function.
3.
Enter the four digit
Address
.
4.
Press the
Send
button.
The user may select from 35 different command or control functions. In addition, the E-969 supports up to
10,000 unique addresses.
There are also eight Call Keys, which allow the user to program and execute predefined scenarios. Four of
the Call Keys are switch accessible, while the other four are accessed through Time Of Day inputs or
Remote Activation inputs (as described in a later section).
The liquid crystal display (LCD) is a 2 line by 24 character configuration. The display is backlit for easy
reading in low ambient light. When the E-969 is not in use, a running 24 hour clock, day of the week and a
stand by message are displayed.
Internal batteries are continuously “trickle” charged, to provide long life. The E-969 will maintain its internal
clock for up to 3 months after being unplugged. The E-969 comes with a UL listed plug in AC adaptor.
A rear panel, two-piece, screw terminal connector is available for field wiring to a base station transceiver.
This connector supports transformer coupled audio, a Push To Talk closure, Squelch monitor input (active
high or low), and Channel Grant input for trunking systems.
Operation
General
Remember, the E-969 must be ON, as indicated by the Stand By message on the display!
Operation of the E-969 is a 3 step procedure, as described on the following pages. The basic flow is from
left to right.
RESET
returns operation to the Stand By mode.
