ADEMCO AHDR1, Руководство пользователя

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Single-Channel Digital Video Recorder
15
SPOT (One Shot Recording)
An external device can be used to trigger the DVR to record one image. Mechanical or
electrical switches can be wired to the
SPOT (One Shot Recording) and G connectors. The
threshold voltage is 4.3V and should be stable at least 0.5 seconds to be detected.
NOTE: One Shot Recording is enabled when the red LED on the REC button is
lit.
SRTI (Record Start In)
The
SRTI
(Record Start In) performs the same function as pressing the Record button. When
the hard disk drive on the “master” DVR is full, it sends a signal to the “slave” DVR to start
recording. Connect the
SRTO (Record Stop Out) and G of the “master” DVR to the SRTI
and
G
of the “slave” DVR (respectively).
NOTE: If the “slave” DVR is already in the record mode a signal on the SRTI
connector will cause no change.
SRTO (Record Stop Out)
The
SRTO
(Record Stop Out) sends a signal to a “slave” DVR to start recording when the
“master” DVR’s hard disk drive is full. Its main use is to trigger additional DVRs when they
are installed in series. Connect the
SRTO and G of the “master” DVR to the SRTI and G of
the “slave” DVR (respectively).
NOTE: If the DVR is set up in the overwrite mode, it will NOT send a signal on
the
SRTO connector when the hard disk drive is full. Instead, it will continue
recording by overwriting the oldest video.
TRIO (Trigger Out)
The TRIO (Trigger Out) outputs a signal each time the DVR records an image. It is used to
synchronize the DVR with a multiplexer. Connect the
TRIO
connector to the trigger pulse
input on the multiplexer. Connect the DVR ground (
G
) to the ground pin on the multiplexer.
See Chapter 3 — Configuration for configuring Trigger Out.
NOTE: When using a multiplexer with the DVR, it is strongly recommended to
connect the
TRIO with the multiplexer trigger pulse input. This ensures that the
multiplexer and the DVR are synchronized.