Product specifications

XX134-08-01 Rev 209 SurveyorVFT Camera Dome System 12BReference • 65
Reference
Coaxial Cable Recommendations
Caution: Careful selection of proper cable is essential to obtain the best performance 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.
Mate
Use onductor. Do not use a copper-plated steel or aluminum center conductor, as they will
resul g will be minimal. If
evere bending and flexing is required for installation, use a stranded center conductor. Never exceed the manufacturer’s
minim dielectric except where heavy moisture exists. For
oist exterior insulation. The shield must be copper
Cabl
The c re the most common 75-ohm types used. They vary in size (diameter), dielectric type and
net D e and better video quality, with increased difficulty in
andl distance provide a guide in choosing the best cable
pe. For cables other than the approved Vicon types below, contact the manufacturers listed below. Note that “BC” refers
Recommended Coaxial Cable Types
Type Shield and
% Coverage
DC Resistance
ohms/1000 ft (km)
rials
only a pure copper center c
t in poor quality video. Solid-core bare copper conductor is the best type, where flexing and bendin
s
um bend radius specification. Use cellular (foam) polyethylene
ure conditions, use solid polyethylene dielectric cable with a heavym
braid providing 95% or better coverage.
e Types
elow aable types listed b
C resistance. The larger cable results in a lower DC resistanc
ing and installation. Let the required picture quality and cable h
ty
to bare copper and “TC” refers to tinned copper.
Cable Belden Alpha West Penn Type Center
Type Type No. Type No. Type No. Conductor
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)
*Requires special BNC-M connector due to 0.305 nominal O.D.
Belden Inc. http://www.belden.com/ (800) 23
lpha Wire Company http://www.alphawire.com/ (800)-52
5-3361
ALPHA (522-5742)
est Penn Wire http://www.westpenn-cdt.com/ (800)-245-4964
Cable Run** ft (m)
A
W
Picture Quality vs. Cable Length
Maximum
Picture Quality
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)
** For longer cable runs, use a Vicon Video Amplifier to obtain a suitable picture.