7
Control or
Indicator
Control or Indicator Function
WAIL 5 SEC
Siren tone. Initiates a high pitched tone, followed by a softer, winding cry. Actual on time
is more than 5 seconds. NOTE: The five-second WAIL siren tone is often referred to as the
NOON TEST.
CW
CW is not used with an IPS.
CCW
CCW is not used with an IPS.
SI TEST®
Initiates the SI TEST
tone and the diagnostic SI TEST
routine.
XMIT TONE
For use with remote station radio transceiver; causes transmission of DTMF tone via RF
link for tone modulation adjustment. The transmit tone level is adjusted by the transmit
level potentiometer on the ESC 864 front panel.
XMIT
Actuates remote station radio transmitter push-to-talk (PTT) circuit. When tone squelch is
used with the transmitter, the XMIT function is used to adjust tone squelch modulation.
DC
DC LED indicates that DC voltage is present during a siren tone or a SI TEST
activation.
FULL
Full LED indicates that all properly loaded remote station speakers are operating during a
siren tone or a SI TEST
activation. Speakers < 60 Watts may not indicate correctly.
DIAGNOSTIC
OUTPUT
Diagnostic output (25 pin connector) serves as the ESC 864 PC board (controller)
input/output port for diagnostic and programming purposes. System diagnostic information
and programming is accomplished with the Whelen MDK-864 Diagnostic Keyboard used
in servicing or testing the IPS.
REPROGRAM
This REPROGRAM pushbutton, which is recessed, is for use by technicians trained in the
use of the MDK-864 diagnostic keyboard for factory service purposes only. CAUTION:
Pressing this button will erase customer-specific programming and return the ESC
864 controller to default settings. Pressing this button will render the siren station
unresponsive to customer-specific activation until the unit is reprogrammed.
ROT
ROT (LED) is not used with an IPS.
PART
PART (partial) LED indicates that at least one speaker driver operated during a warning
tone or a SI TEST
activation. Speakers < 60 Watts may not indicate correctly.
AC
AC LED indicates that AC voltage was present during a warning tone or a SI TEST
activation.
CLIPPING
INDICATOR
The clipping indicator LEDs illuminate when a warning tone is active or when a public
address signal of sufficient amplitude is processed by the tone generator.
MIC VOLUME
This knob controls the output volume of local public address announcements. In
determining a sufficient volume adjustment for local public address announcements, the
clipping indicator LEDs should just begin to blink when the local announcement is
produced. This "blinking" indicates the maximum amplification of sound with negligible
distortion.
MIC
This microphone jack is used for local public address announcements. Upon insertion of a
microphone plug into the jack, the timer set LED may come on for approximately one
second. To use the microphone, squeeze the lever on its side completely and verify that the
timer set LED illuminates. Use of the local microphone disconnects remote radio audio
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