Soutwest Microwave MicroWave 330, Руководство по установке

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Figure 7 shows amount of overlap required to detect against hands and knees crawling intruders, as a function of
“Sensitivity” setting. It is always recommended to keep the sensitivity setting at the lowest possible value to
minimize nuisance alarms but maintaining a high probability of detection.
DEAD ZONE -
F
EET
Figure 7 – Sensitivity vs Dead Zone
3.3.1 High Security Overlaps
For maximum-security applications where detection of prone “commando style” crawl is required, the
intermediate over-lap should be 60 feet (18.3m) minimum with parallel beam centerline offset of 18 inches
(46cm) maximum. The corner overlaps should be 30 feet (9.2m) minimum. Terrain flatness should be no more
than plus three inches or minus three inches deviation from a plane drawn between the transmitter and receiver.
The zone length (Transmitter to Receiver) should not exceed 400 feet (122m).
High security applications also use stacked link configurations to meet site requirements. A stacked link may
consist of two or more MicroWave 330 links or used in combination with the Model 300B link which operates
at X-band frequency of 10.525 GHz. A stacked link greatly reduces the dead zone and increases PD.
3.4 Transmitter Block Diagram
MicroWave 330T Transmitter consists of two major subassemblies – RF Assembly and Transmitter Circuit
Board. A block diagram is shown in Figure 8.
S
lave
M
odulation
Ta
m
p
er
Figure 8 – MicroWave 330 Transmitter