ZETRON CellPhone Detector Plus, Руководство пользователя

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8
Alarm Output
The Alarm Output can be used to remotely alert personnel to
an on-going alarm. For example, this output could be wired
back to a security office, nurse’s station, control room, or
trigger an external alarm system.
The Alarm Output is an open collector transistor. When no
alarm is in progress the output impedance is very high. When
an alarm is on-going, the output goes into a low impedance
state of 66 ohms.
Even if the RF signal has terminated prior to the end of the
alarm message, the Alarm Output stays in the low impedance
state for the entire length of the alarm message. At the end of
the message the CellPhone Detector Plus checks to see if an
RF signal is still present. If no RF signal is present the alarm
output returns to the high impedance state. This allows the
alarm output to be used as a trigger to count the number of
times RF has been detected as well as an indicator for the
length of time the alarm has been active.
Alarm Output
Connector 2.5 mm mono-audio jack, tip is
output, sleeve is ground
Maximum external
applied voltage 24 volts
Maximum continuous
current sink 10 mA
Audio Output
The Audio Output can be used to input the alarm directly into a
public address system, extend the alarm so that it can be
heard from several locations, or amplify the audio for
excessively noisy areas.
When the audio jack is in use, the audio message can still play
through the unit’s speaker. The internal audio amplifier,
however, is not used with the audio out.