Installation and Operation Manual
19
Audible Alarm
The Audible Alarm option controls the MUX-1602C alarm
tone. It
toggles as follows:
ON
– The MUX-1602C sounds an alarm tone when it
detects a
mechanical alarm or loss of video. Press any
button to turn
the alarm tone off.
OFF
– The MUX-1602C is silent when it detects a
mechanical
alarm or loss of video.
The default Audible Alarm setting is
OFF.
Alarm Input Polarity
The Alarm Input Polarity option allows you to set the polarity of
all MUX-1602C alarm inputs. It toggles as follows:
ACT LOW
– Active alarm inputs are “low”. The MUX-
1602C
recognizes a contact closure or TTL/CMOS logic
low as an
alarm event.
ACT HI
– Active alarm inputs are “high”. The MUX-
1602C
recognizes a contact opening or TTL/CMOS logic
high as an
alarm event.
The default alarm input polarity setting is
ACT LOW.
Input Impedance
The Input Impedance option allows you to set the termination
status of all MUX-1602C camera inputs. This option toggles
between
75
OHMS
and
HI-Z. Set the impedance based on whether camera
video must be terminated at the MUX-1602C camera input
connectors.
If another device is to be connected to an MUX-1602C
cam
out
connector, you must do the following:
1.
Set the MUX-1602C’s input impedance to
HI-Z.
2.
Place a 75-ohm terminator on the
cam out connector of each
camera not connected (looped) to another device.
3.
Configure each device connected to a
cam out connector for
75-ohm video termination.
It is very important that each camera be correctly terminated in
this way. Check your installation carefully to avoid either
unterminated or double-terminated cameras.
The default Input Impedance setting is
75 OHMS.
