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47
Operations
Description, Specifications, Installation, and Operation Manual
Federal Signal
www.fedsig.com
Alternatively, with the speakers plugged into the amplifiers:
1. Turn the DV GAIN pot fully (25 turns) counter clockwise.
2. Play the stored tone function.
3. Monitor the amplifiers output level.
4. Turn up the DV GAIN pot until 23 V
rms
is reached.
NOTE: It is important to start by turning the DV GAIN pot down to a low level and
work your way up to prevent overdriving the amplifiers and speakers.
These methods leaves the tone 0.4 to 1.8 dB low, depending on frequency, but limits the
current to a safe level.
Converting the files
To convert the files:
1. Adjust the amplitude to ensure that the peaks are at or slightly into the limits. If
converting from 16 bit to 8 bit, ensure that dithering is disabled.
2. To program activation codes with Digital Voice Messages under them, follow the
instructions in the programming software. It is possible to assign codes to the
functions DIG VOICE 1 through DIG VOICE 4093. As in all sounding functions, the unit
must first receive the ARM command followed by one of the DIG VOICE commands
to activate the stored message. The Digital Voice Volume is adjustable through a
potentiometer located on the controller front panel, called DV GAIN.