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RFI Interference
1. Make sure that both the control head and amp are securely attached to good
chassis ground (i.e. no paint in-between the chassis and the grounding terminal).
2. Keep the siren control head and the police radio as far away from one another
as is practical.
3. Check that the police radio antenna wire makes a right angle from the back of
the police radio and runs on one side of the vehicle. The communications cable
for the siren should make a right angle out of the back of the control head and
exit in the opposite direction from both the police radio antenna wire and the
police radio power wires.
4. Excess communication cable from the control head to the amp should be tightly
bound back near the amplifier box.
5. An RFI choke (www.digikey.com P/N: 240-2066; STAR P/N: P30039-57) can be
placed around the communications cable at the back of the siren amplifier box.
6. You can also place a second RFI choke around the Red and Black wires exiting
the siren amplifier box.
(Troubleshooting CONT’D)
S IR E N C O N T R O L H E A D
R A D IO
R A D IO P O W E R W IR E S
A N T E N N A L E A D
S IR E N C O M M U N IC A T IO N S C A B LE
S IR E N P O W E R W IR E S
S IR E N A M P
R F I C H O K E S
B A TT E R Y
Speaker Diagnostics
There are two diagnostic LED’s located in the lower left hand
corner of the control head. These LED’s will only turn on while
a tone is trying to be generated. Status of the speakers are
indicated as follows:
Steady - Speaker is connected and operating properly.
Flashing - There is an electrical short in the speaker or wires
to the speaker.
Off - No speaker is connected, or
- The siren is not activated to output a tone to the speaker, or
- The speaker or wire connection is loose or is electrically open
