TM
3-6665-316-12
1-13.
TECHNICAL THEORY OF OPERATION
The Simulator makes it possible to activate M43A1 Detectors from up to 1000 meters
away.
Using the Simulator, an operator can imitate the movement of a chemical
agent cloud across an area.
Each Simulator consists of one transmitter, four
receivers, cables, antennas, and two sets of tone modules.
The transmitter is used to broadcast a frequency-modulated (FM) radio signal, which
causes an electronic switch closure in a receiver.
This switch closure causes an
M43A1 Detector to alarm.
The signal broadcast by the transmitter consists of three different tones which are
The actual tones and the order in which they are
transmitted in a timed sequence.
transmitted can be varied, and make up the signal code.
This code determines which
receiver(s) will respond to a signal from a transmitter.
The key to
the code is the plug-in tone module.
The tone module consists of three
resistors.
The values of the resistors determine the signal tones. The physical
positions of the resistors in the tone module determine the basic sequence. The
actual sequence in which the tones are transmitted is determined by the setting of
the 5-position CHAN SEL switch.
The signal code a receiver will respond to is determined by the receiver tone
module.
The receiver tone module also contains three resistors. The values of the
resistors determine to which tones the receiver will respond.
The physical posi-
tions of the resistors in the tone module determine to which tone sequence the
receiver will respond.
Each tone module is identified by a SERIAL number. The first three digits, or
GROUP number, will vary according to the values of the resistors in the tone
module.
The last digit, or UNIT number, will vary according to the physical posi-
The UNIT number for a transmitter tone
tions of the resistors in the tone module.
module is always 5.
The UNIT number for a receiver tone module can be 1, 2, 3, or
4.
The transmitter tone module is mounted on the encoder printed wiring assembly. The
receiver tone module is mounted on the decoder printed wiring assembly.
Transmitter tone modules cannot be mounted in receivers, and receiver tone modules
cannot be mounted in transmitters.
CAUTION
Any attempt to mount a transmitter tone module
in a receiver or vice-versa could damage the
equipment.
Each set consists of one transmitter tone
Each tone
module is part of a set.
The GROUP numbers on all five tone modules
module and four receiver tone modules.
in a set will be the same.
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