
STACK Digital Video Recorder
Installation
Users Guide
9
If monophonic audio recording is required, connect a microphone
to the L (white) microphone input. An extra 2.1mm power
connector has been provided if that microphone needs to be
powered. Microphone gain can be adjusted by the PC
configuration software, see page 22.
If stereophonic audio recording is required, a second microphone
should be connected to the R (red) microphone input.
If audio recording is not required, it may be disabled to extend the
record time, see page 22.
The DVR provides a status output to indicate the system is
recording. Connect the optional Recording Status Lamp to the RL
connector. This is active-low (pull-down to ground) when
recording is OK and can be used to drive a LED with up to 50mA
max. (see wiring schematic below).
Never connect this to a light bulb since that will damage the
DVR’s internal circuits.
75
Ω
B+ (DC Supply to DVR)
Current Limiting
Resistor, eg, 1K
Ω
LED
Internal to
DVR
RO (Record OK)
GND (0 volt Ground)