Senstar Corporation 24000 User Manual
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1. Power the units up by following the Installation - electrical instructions. This power may be temporary (batteries).
2. Using the mounting height chart, Figure 3-3, determine the approximate mounting height of the units.
3. Follow the Operating instructions to ensure the units are functioning correctly. Connect a digital voltmeter to TP-10
(AGC Voltage) on the receiver. Move the “LATCH/TIMED” jumper to the “LATCH” position to speed up the AGC
response.
response.
4. Slowly move both units vertically up and down from the nominal mounting height determined from Figure 3-3. The
optimum mounting height is reached when the digital voltmeter reading is the highest. Mark the spot on the wall and
attach the wall mount to the wall.
attach the wall mount to the wall.
5. Attach the units to the mounts.
Determining mounting height
The mounting height chart (Figure 3-3) is used to determine the best theoretical mounting height of the
transmitter/receiver units for optimum efficiency of the sensor system. This height chart is intended to furnish a
preliminary mounting height only. The final operating height will be determined during electrical alignment and
final adjustment.
transmitter/receiver units for optimum efficiency of the sensor system. This height chart is intended to furnish a
preliminary mounting height only. The final operating height will be determined during electrical alignment and
final adjustment.
Chart axis
The horizontal axis of the height chart represents the distance between the transmitter and receiver units. The
vertical axis represents the mounting height of the transmitter/receiver units from the center of the antenna to the
ground.
vertical axis represents the mounting height of the transmitter/receiver units from the center of the antenna to the
ground.
Node curves
The node curves (N1, N2, N3 and N4) represent the pivot point for coordinating distance (horizontal axis) to
mounting height (vertical axis). Those mounting height and distance coordinate lines that meet in the area
between the node curves should be avoided. Coordinate lines that meet on the node curves are preferred because
they will result in higher signal strength at the receiver and a wider fade margin. However, choosing a mounting
height at N1 or below will also allow satisfactory system operation.
mounting height (vertical axis). Those mounting height and distance coordinate lines that meet in the area
between the node curves should be avoided. Coordinate lines that meet on the node curves are preferred because
they will result in higher signal strength at the receiver and a wider fade margin. However, choosing a mounting
height at N1 or below will also allow satisfactory system operation.
Example:
The distance between the transmitter and receiver is 91 m (300 ft.). Locate this distance on the height chart's
horizontal axis. Plot a vertical line from this distance point across the node curves. These height measurements
represent the best theoretical mounting heights for this example. They are 84 cm (33 in.) or less for the N1 curve
and below, 140 cm (55 in.) for the N2 curve, 183 cm (72 in.) for the N3 curve, or 224 cm (88 in.) for the N4 curve.
horizontal axis. Plot a vertical line from this distance point across the node curves. These height measurements
represent the best theoretical mounting heights for this example. They are 84 cm (33 in.) or less for the N1 curve
and below, 140 cm (55 in.) for the N2 curve, 183 cm (72 in.) for the N3 curve, or 224 cm (88 in.) for the N4 curve.