Service manual

7
Characteristics
DCB, DCFCB and DCFCTB Models
used as a Civil Defense “Alert” signal. The Wailing signal is often used as a Civil
Defense “Attack” signal. The Fast Wail or Fire signal is often used to summon the
local fire department. You can use any of the signals for any desired application.
These signals are shown graphically in the following figure.
Figure 2 DCB and DCFCB Signal Characteristics
One-Way Radio Control
You can remotely activate the siren by a radio signal when an optional radio
receiver/decoder is incorporated with the Control Unit/Battery Box. The advantage of
radio control activation is that control lines are not required between the siren control
site and the siren location. For units equipped with the optional integral radio
receiver, the RF Frequency configuration parameter sets the frequency of the radio
channel. Changing this parameter from its factory setting requires re-alignment of the
radio for maximum performance. The value entered must fall within the range
specified for the receiver band equipped.