SD Video Recorder
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22. Q: what is “Power OFF Delay”?
A: Users who need to install DVR often want the DVR to record the images inside and
outside the car for a while after the driver turn the engine off. That is, DVR cannot be turned
off after engine is shutdown, it should be off after record continuously for the specified period
of time. This time is called “Power OFF Delay” time, such as 30 seconds. You can set the time
you need on "Car Settings – Power Off Delay ".
When the users who need “Power OFF Delay” function, the positive level of the DVR and
the ground should be connected directly (through the fuse) to the cathode and anode of the
car battery, at the same time attach car ignition signal line to the ACC of the car.
Of course, the time of “Power OFF Delay” cannot be set too long, because after the engine
shutdown, mobile DVR entirely depend on the power of the car battery to work, we should
prevent the vehicle can’t start correctly next time if the mobile DVR drained the energy of the
car battery.
23. Q: Why does DVR keep alarm when I set the motion detection, even if the
image moving is not obvious?
A: First, please make sure that if the sensitivity settings of the motion detection are
correct, sensitivity is divided into 9 levels. The ninth level is the highest sensitivity; the first
level is the lowest sensitivity.
Second, make sure that if your camera system (PAL system or NTSC system) match
the stroboscopic lighting devices such as fluorescent lights. PAL system is 50Hz system, NTSC
system is 60Hz system, and there are also two kinds of working frequency of power grid: 50Hz
and 60Hz. if a PAL camera of 50Hz work under the fluorescent lights driven by the power grid
of 60HZ, images will appear frequency difference flashing of 10Hz, this will led system to think
scenery brightness is changing continuously, and motion detection alarm is based on the
changes of scenery brightness to work, this will triggered motion detection alarm. Conversely,
a false alarm will also occur when a camera of 60Hz works under the fluorescent lights driven
by the power grid of 50HZ.
24. Q: What does the indicator light mean on the wire control L25?
A: The indicator light on the wire control is double color light, red and green. See the
following form for their state.
State of
green light
meaning
State of
green light
meaning
One slow flash
every three
seconds
System start
Slow flash every
three seconds
Communication of
wire control is not
normal
One flash every
second
System is normal
but no record
One flash every
second
No memory device
lighting
System recording
normal
lighting
No definition
One flash every 0.5
seconds
No definition
One flash every 0.5
seconds
System alarm
indicator (the
same as buzzer
˅
