Transceiver Placement

corridor. The number of transceivers installed to cover

2-5. Transceiver Placement

a given area or number of rooms can be calculated by

the graphs in figures 2-1 and 2-2. These graphs relate

Placement of transceivers is extremely important for

the typical maximum range for each transceiver to the

optimum surveillance protection. Transceivers should

number of transceivers in the system and levels of the

be placed so that the most likely intruder motions (such

background turbulence.

as through a doorway or along a corridor) are toward, or

away from the transceiver, rather than across the beam.

2-6. Processor Placement

If more than one transceiver is necessary to protect an

area, it is preferable to have them all face in one

The processor shall preferably be installed within the

direction so that they may reinforce one another. For

protected area. It should be placed in a weather

example, to protect a long hall (less than 100 feet), do

protected area, mounted in a horizontal or vertical

not place transceivers at each end so that they face

position, and firmly secured.

To facilitate

each other. Instead, place one transceiver at one end

interconnections and maintenance, consideration should

and the second transceiver at the mid point, also facing

be given to its accessibility and to the adjacent

in the same direction. An alternate would be two

approaches to the unit. Placement of the processor in

transceivers placed in the center of the hallway pointing

relation to the transceivers may be located at either end

in opposite directions. An exception to this rule is when

of a string of transceivers as shown in A of figure 2-3, or

the corridor is more than 100 feet long. Transceivers

located between transceivers as shown in B of figure 2-

may then be placed at each end facing each other. In

this configuration it must be recognized that coverage

will be pool. or non-existent at the mid-area of the

Figure 2-3. Processor-connection methods.

2-3