
Changing antenna polarity
MPS-4100 product guide • • • 3 - 5
Changing antenna polarity
There are two field adjustable antenna polarizations for the MPS-4100 Microwave
system. Narrow Beam (vertical polarization) is the default setting and results in a
slightly narrower detection field. Wide Beam (horizontal polarization) is achieved
by rotating the Receiver and Transmitter antennas 90º and results in a slightly
wider detection field.
When stacking multiple sets of MPS-4100 units in a vertical array, it is
recommended that the antenna polarity be altered from set to set. This is in
addition to changing the modulation frequency of each set. Use the Narrow Beam
setting for the upper microwave pair and use the Wide Beam setting for the lower
microwave pair. Changing both the antenna polarity and the modulation
frequency eliminates any possible crosstalk between sets (indicated by the Wrong
Channel LED on the Receiver). Antenna polarity is altered by rotating the antenna
assembly of the Transmitter and Receiver as follows:
1. Remove the rear cover of the Transmitter.
2. Loosen the 4 screws that hold the PCB assembly to the chassis.
3. Rotate the assembly 90º clockwise until the Wide Beam mark points down.
4. Tighten the 4 screws to secure the assembly to the chassis.
5. Repeat the process at the Receiver. The Receiver board is not labelled for
Narrow Beam and Wide Beam. When in the Narrow Beam position, terminal
block TB-1 is horizontal across the bottom of the circuit board. In the Wide
Beam position TB1 is vertical on the left side of the circuit board.
Self-Test function
To activate the self-test function for the MPS-4100 Receiver, apply +12 VDC to the
self-test terminals on TB1 for at least one second (
observe polarity
).
The alarm relay will activate and the alarm LED will turn ON, indicating proper
operation of the Receiver.
Refer to the StarNeT 1000
Control Program Maintenance Guide, J4DA0402 and
Control Program Operator’s Guide, J4DA0302
for directions on how to configure
the self-test for a StarNeT 1000 network system. Refer to the MX-5000 Series
manual for directions on how to configure the self-test for an MX-5000 network
system.
Содержание MPS-4100
Страница 1: ...Product MPS 4100 Microwave Protection System Guide E6DA0102 003 Rev C Third Edition April 27 2009 ...
Страница 6: ......
Страница 70: ......