Senstar Corporation 24000 User Manual

At the receiver, connect a digital voltmeter between TP-10 (+) and TB1-1 (-). This is the automatic gain control 
(AGC) voltage. After final alignment, as outlined below, the AGC voltage should be between 1.7 and 7.3 VDC. Put 
the SHORT-LONG jumper in the LONG position to increase the AGC voltage. Put the SHORT-LONG jumper in the 
SHORT position to decrease the AGC voltage.

Slowly move the receiver unit up and down the post while monitoring the receiver AGC voltage. Once a maximum 
AGC voltage is obtained, rotate the receiver until maximum AGC is obtained on this axis. Tilt the receiver antenna 
up and down, again adjusting for maximum AGC voltage.

Continue to monitor the AGC voltage at the receiver while moving the transmitter in all three axes as described for 
the receiver, until maximum AGC voltage is obtained.

Before securing the hardware, repeat the transmitter and receiver unit electrical alignment steps for obtaining 
maximum AGC reading on all rotational axes.

Secure the mounting nuts and bolts. Ensure the AGC voltage remains high while this hardware is tightened. If the 
final AGC voltage is greater than 4.0 volts, put the SHORT-LONG jumper in the SHORT position; this will reduce 
the voltage to the 2.5 to 3.0 volt range. Put the TIMED-LATCHED jumper into the TIMED position for normal 
operation.

Before beginning a sensitivity adjustment, make sure the receiver “ALARM” LED is not lit. Connect an ohmmeter 
between TB1 - terminals 10 and 11. It will read less than 0.5 ohms when the system is operational (armed) and 
infinity when the unit is in alarm. Leave the ohmmeter connected.

A preliminary alarm test requires walking across the detection zone to ensure the unit goes into alarm (“ALARM” 
LED lit, ohmmeter to infinity). If it does not, adjust the sensitivity potentiometer (R55) clockwise; then walk test 
the zone again. An alarm report should normally occur before a line of sight between the transmitter and receiver 
units is broken by the walker.