Menu #2 - Advanced Features - Directed Electronics 554A Installation Manual

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1-9 ARMED WHILE DRIVING (AWD) ON/OFF: In the default setting (Armed While Driving),
the system can be armed with the ignition on. When armed, the ground-when-armed is not active
and the sensors are bypassed. The door triggers will remain active.
1-10 CODE HOPPING
ON/OFF: The system uses a mathematical formula to change its code
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each time the transmitter and receiver communicate. This makes the group of bits or "word" from
the transmitter very long. The longer the word is, the easier it is to block its transmission to the unit.
Disabling the Code Hopping
mitted word. As a result, the unit may have better range with Code Hopping

Menu #2 - Advanced Features

2-1 SIREN OUTPUT CONSTANT/PULSED: The system can be programmed to output pulses
instead of a continuous output when the system is triggered. This is useful to honk the factory horn
in applications where a siren is undesirable. Remember that the unit is only capable of supplying 1
amp of current. A relay will be required to interface with most factory horn systems.
2-2 SIREN DURATION 30/60 SECONDS: It is possible to program the unit to sound for
30 or 60 seconds during the triggered sequence. Some states have laws regulating how long
a security system can sound. When using the 998T Bitwriter
sound for any length of time from 1 second to 180 seconds.
2-3 NUISANCE PREVENTION
triggering of the same zone. If one zone is triggered three times in one hour, that zone is bypassed
for one hour, starting from the time of the third trigger. During that hour, if the system sees a trigger
on that zone again, the system resets the one hour timer. If one hour passes and the zone has not
triggered again, the zone is activated and can trigger the system again. NPC™ only monitors sensor
inputs, and does not bypass the door trigger or the ignition trigger at any time. If NPC™ is turned
off, the system will respond to repeated triggers on the sensor inputs and will do so indefinitely.
Some states have laws regulating how many times a security system can trigger before it is considered
a nuisance and the vehicle is towed away.
2-4 PROGRESSIVE DOOR TRIGGER ON/OFF: The system responds to a door trigger input with
a progressive response. When the door is opened with the system armed, the siren will chirp 10
times prior to the full triggered sequence. The door trigger is still treated as an instant trigger and
closing the door quickly will not prevent full triggered sequence from occurring. If the progressive
door trigger is programmed off, the full siren output will occur the moment the door is opened.
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feature lets the receiver ignore the Code Hopping
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CIRCUITRY (NPC™) ON/OFF: NPC™ stops repeated
part of the trans-
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off.
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, the siren can be programmed to
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©
2003
Directed Electronics, Inc.

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