MPS-4100 Transmitter
MPS-4100 product guide • • • 1 - 5
MPS-4100 Transmitter
The Model MPS-4100 Transmitter consists of two major sub-assemblies, the
antenna assembly and the Transmitter circuit board.
The antenna assembly is a planar or linear patch array (see Figure 1-3) coupled to
a pulse modulated dielectric resonant oscillator located on the back of the
antenna. The antenna directs the microwave energy toward the Receiver. The
antenna assembly and associated DRO attaches to the Transmitter circuit board by
means of stand-off fasteners so that the two form a single removable assembly.
The Transmitter circuit board includes the modulator circuit to drive the
oscillator. One of six modulation frequencies can be selected via jumpers located
on the board.
The Transmitter includes a Tamper switch with selectable NO/NC output that
signals when the cover on the rear of the housing has been removed. The Tamper
switch is a 2-position plunger (secure, alarm) and includes a pull-out position that
disables tamper notification, for servicing the unit.
An optional method for Tamper detection (switched power) which requires no
additional tamper wiring, has been incorporated in the Transmitter. With this
option selected, the power to the Transmitter is interrupted whenever the
enclosure cover is removed. This stops the transmission of microwave energy,
resulting in an alarm condition at the Receiver.
Figure 1-3 Linear patch array antenna