8
Control or
Indicator
Control or Indicator Function
input from the tone generator's input, eliminating outside interference. Removing the
microphone from the microphone jack restores the remote radio audio input.
XMIT
The XMIT LED, when illuminated, indicates that the ESC-864 is actuating the IPS
transmitter push-to-talk (PTT) circuit and is transmitting data or a test tone.
PWR
The PWR (power up) LED indicates that all modules in the remote station are powered up
and all parts of the system are ready to operate. For systems using AC power operating the
IPS battery charger, this LED is on at all times unless an AC outage occurs, prompting the
IPS to go into a power-saving mode.
DEC
The DEC (decoder active) LED illuminates when the DTMF tone decoder receives and
processes incoming DTMF tones. The DEC LED appears to flash when it illuminates. This
is a normal condition, as it blinks for every valid DTMF digit that is decoded.
PROG
The PROG (program) LED only illuminates when the MDK-864 Diagnostic Keyboard is
used and the program switch on the MDK-864 is in the ON position. When the program
LED is illuminated, the siren cannot be activated remotely.
SQ
The SQ (Squelch) LED illuminates when the radio receiver detects that the appropriate
carrier frequency is active. For systems that have the optional programmable receive tone
squelch tone decoder, the LED only illuminates when the receive frequency, as well as the
subaudible tone squelch frequency tone, is detected.
TIM
The TIM (timer set) LED illuminates whenever the system is activated by either radio link,
landline control, or from the front panel for any of the siren functions or public address.
XMIT LEVEL
The XMIT (transmit) LEVEL adjustment potentiometer controls the modulation of the
DTMF tones that are transmitted when the remote station status reporting option is used.
RADIO
LEVEL
The RADIO LEVEL adjustment potentiometer is used to set the audio level that will be
passed on to the tone generator from a radio receiver or landline audio input.
NOTE: The transmit level and the radio level adjustment potentiometers are preset at
the factory and should not be changed except by qualified personnel.
POWER AMP
LEDs
The power amplifier LEDs, located on the front panel to the left of the ESC-864 case face
plate, are used for visual inspection and verification regarding the wiring circuit between
each power amplifier channel and its respective speaker drivers. One speaker driver is
wired to each power amplifier channel by a dedicated pair of wires. Upon activation of a
warning or siren tone, a SI TEST
tone, or a public address signal of sufficient level, these
LEDs should illuminate, indicating a complete circuit. NOTE: The LEDs assume the IPS
is operating under proper speaker loading capacity. Without sufficient loading, the
LEDs will not operate effectively. Speakers < 60 Watts may not indicate correctly.
Содержание IPS 400
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