Caution
: Careful selection of proper cable is essential to obtain the best perfor-
mance from this equipment. Vicon assumes no responsibility for poor performance when
cables other than those recommended, or equivalent, are installed. In all cases, coaxial
cable impedance should be 75 ohms.
Materials
Use only a pure copper center conductor. Do not use a copper-plated steel or aluminum
center conductor, as they will result in poor quality video. Solid-core bare copper conductor
is the best type, where flexing and bending will be minimal.
If severe bending and flexing is required for installation, use a stranded center conductor.
Never exceed the manufacturers minimum bend radius specification. Use cellular (foam)
polyethylene dielectric except where heavy moisture exists. For moisture conditions, use
solid polyethylene dielectric cable with a heavy exterior insulation. The shield must be cop-
per braid providing 95% or better coverage.
Cable Types
The cable types listed below are the most common 75-ohm types used. They vary in size
(diameter), dielectric type and net DC resistance. The larger cable results in a lower DC
resistance and better video quality, with increased difficulty in handling and installation. Let
the required picture quality and cable distance provide a guide in choosing the best cable
type. For cables other than the approved Vicon types below, contact the manufacturers list-
ed below. Note that “BC” refers to bare copper and “TC” refers to tinned copper.
Recommended Coaxial Cable Types
*Requires special BNC-M connector due to 0.305 nominal O.D.
Belden Inc.
http://www.belden.com/
(800) 235-3361
Alpha Wire Company
http://www.alphawire.com/
(800)-52 ALPHA (522-5742)
West Penn Wire
http://www.westpenn-cdt.com/
(800)-245-4964
Picture Quality vs. Cable Length
** For longer cable runs, use a Vicon Video Amplifier to obtain a suitable picture.
RG-11/U 8213
9847
811,4811
14 Solid BC
BC braid (95%)
2.6 (8.5)
RG-6/U
9248
9804C
806,4806
18 Solid BC
Foil + 61% TC braid (100%)
7.5 (24.6)
RG-59/U 8281*
----
815
20 Solid BC
2 TC braids (96%)
9.9 (32.5)
RG-59/U 9259
9803
816
22 Stranded BC BC braid (95%)
15.0 (49)
RG-59/U 9659
----
----
22 Stranded BC BC braid (95%)
15.0 (49)
Picture Quality
Maximum Cable Run** ft (m)
RG-59/U RG-6/U RG-11/U
Usable picture
1100 (350)
1500 (450)
2400 (750)
Clean picture
820 (250)
1000 (300)
1600 (500)
Best picture
400 (120)
530 (160)
820 (250)
Cable
Type
Belden
Type No.
Alpha
Type No.
West Penn
Type No.
Type Center
Conductor
Type Shield and
% Coverage
DC Resistance
ohms/1000 ft (km)
Содержание VCR480TL
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