Code 3 Scorpion Siren - Manual (Page 3)

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Instant-On- There is no " ON/OFF " switch. Selecting any siren function, or keying the microphone will
activate the siren assuming the siren is connected to a source of +12V.
Automatic Short Circuit Protection- The siren will sense a short circuit on the speaker terminals and
automatically go to standby until the fault is removed. Once the fault is removed the siren will return to normal
operation.
Instant Public Address - Public Address override of all siren functions when the microphone Push-to-Talk
(PTT) key is pressed.
Noise Cancelling Microphone - Wired in microphone that is easily unplugged internally for service or
replacement.
In addition to the standard features of the Model 3930 siren listed above, the following features are standard
on Model 3932 sirens:
Radio Rebroadcast - Broadcasts Two-way radio reception over siren speakers. These inputs are
transformer coupled to prevent loading of the radio.
Park Kill- This feature deactivates the siren tones when the vehicle is shifted into park. Once PKILL is
activated the siren will remain deactivated until the vehicle is shifted into gear and the siren is restarted using
the Horn Ring Scroll feature or the front panel switches.
Adjustable Backlighting- Backlighting is independent of siren power. Allows connecting to dimmer if
desired.
Horn Ring (Remote) Scroll - The siren accepts either a positive or a ground (Earth) signal, usually from the
vehicle's horn switch (or other user supplied switch), and remotely scrolls through the siren tones or activates
AIR HORN function. See Set-up and Adjustments section for details.
InterClear ® - This unique feature can be used to activate additional warning lights for 7 seconds, each time
the siren mode is changed using either the control switches or the vehicle horn ring, thus allowing an
additional level of warning in situations such as intersections without the operator having to take his hands off
the wheel or his eyes off the road.
Unpacking & Pre-installation
After unpacking your 3930 series siren, carefully inspect the unit and associated parts for any damage that
may have been caused in transit. Report any damage to the carrier immediately.
Installation & Mounting
The 3930 series siren may be mounted above the dash, below the dash, on a tunnel or in a rack with the
mounting bracket (bail) and the hardware supplied (see Fig. 1). Ease of operation and convenience to the
operator should be the prime consideration when mounting the siren and controls.
WARNING!
!
All devices should be mounted in accordance with the manufacturer’s instructions and
securely fastened to vehicle elements of sufficient strength to withstand the forces applied
to the device. Ease of operation and convenience to the operator should be the prime
consideration when mounting the siren and controls. Adjust the mounting angle to allow
maximum operator visibility. Do not mount the Control Head Module in a location that will
obstruct the drivers view. Mount the microphone clip in a convenient location to allow the
operator easy access. Devices should be mounted only in locations that conform to their
SAE identification code as described in SAE Standard J1849. For example, electronics
designed for interior mounting should not be placed underhood, etc.
Controls should be placed within convenient reach* of the driver or if intended for two
person operation the driver and/or passenger. In some vehicles, multiple control switches
and/or using methods such as “horn ring transfer” which utilizes the vehicle horn switch to
toggle between siren tones may be necessary for convenient operation from two positions.
*Convenient reach is defined as the ability of the operator of the siren systems to manipulate
the controls from his normal driving/riding position without excessive movement away from
the seat back or loss of eye contact with the roadway.