Installation (cont’d)
2) Check the video input at the transmitter unit to make sure you have video present. Connect the
video to the BNC jack of the VB37 transmitter unit. The transmitter is a passive device called a
Balun and requires no power.
3) Connect the twisted pair to the screw terminals and note the polarity of this connection. If the
wires are reversed, when you connect the receiver the video will not be viewable on the monitor.
4) Plug the receiver card into the Nitek card cage and connect a test monitor to the desired output
BNC connector (1, 2, 3 or 4).
5) Locate the twisted pair input terminals (marked “+” and “-”) which match the video output BNC
selected. Connect the twisted pair, note the polarity of the connection. If the wires are reversed the
video will not be viewable, this will not damage the unit. Reverse the wires and the video will be
correct.
6) DIP switches are provided so that the unit can be adjusted for the best picture. The following
settings are factory recommended for normal conditions. For added sharpness adjust switches 7
and 8. For more gain adjust switches 5 and 6. Switches 1, 2 and 3, 4 must be operated in pairs.
7) You can now disconnect the test monitor and connect the video out of the receiver unit as
needed for your installation.
Unmarked Positions are Off Video
Level Gain
Video
Peaking
Switch Position
1 2 3 4 5 6 7 8
100-400ft
(30-120m)
400-700ft
(120-200m)
ON ON
700-900ft
(200-275m)
ON ON ON
900-1100ft
(275-330m)
ON ON ON ON
1100-1300ft
(330-400m)
ON ON ON ON
Distance
>1300ft
(>400m)
ON ON ON ON ON ON
1 2 3 4 5 6 7 8
T568B
2 2 3 1 1 3 4 4
+
-
+
-
+
-
+
-
Twisted Pair Wiring
for T568B Jack
Pin# Wire
1 Video 2 +
2 Video 2
-
3 Video 3 +
4 Video 1
-
5 Video 1 +
6 Video 3
-
7 Video 4 +
8 Video 4
-
Troubleshooting
Problem Video inverted or rolling and unstable.
Fix/Cause • Reverse the wires of the twisted pair at either the transmitter or receiver.
Problem No video out at the receiver.
Fix/Cause • Check to make sure that there is video in at the transmit end.
• Make sure that the pair of wires you are using is not open or shorted between the
transmit and receive points.
Problem Ghost image at the receiver.
Fix/Cause • Bridge tap or “T” tap on the twisted pair video line. Remove tap.
(12 pages)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Commentaires sur ces manuels