Vicon surveyor X971, Installation And Operation Manual

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Reference
Coaxial Cable
CAUTION: Careful selection of the 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 are installed. In all cases, coaxial cable impedance should be 75 ohms.
Materials
Use only cable with a pure copper center conductor. Do not use cable with either a copper-plated steel or an aluminum
center conductor because these do not transfer signals effectively in the frequency range used in CCTV networks. A
center conductor with low DC resistance is required for effective CCTV operation. Solid-core bare copper conductor is
best suited to video applications, except where flexing occurs. If the coaxial cable will be subjected to flexing during
normal use, select a cable with a stranded center conductor. The preferred dielectric material is cellular (foam)
polyethylene. It has better electrical characteristics than solid polyethylene, but is more vulnerable to moisture. Therefore,
use only solid polyethylene dielectric cable with a heavy exterior insulation in applications subject to moisture.
Cable Types
The most commonly used cable types are RG-59/U and RG-11/U. Each is actually a family of cables with widely varying
electrical characteristics, some of which are not suitable for CCTV applications.
Choose a cable type by referring to the characteristics and maximum distances listed below. The maximum distance for
best picture refers to the distance between the receiver and the transmitter. The characteristics of the cables in this table
should be used as a guideline when cables other then Belden are used. Materials and construction must follow the
guidelines above. Note that “BC” refers to bare copper and “TC” refers to tinned copper.
Amplification
When Vicoax systems are used with bidirectional amplification a significant increase in the usable cable distance is shown
in the last column of this table. The V1921BDA Bidirectional Amplifier may only be used with the “standard Vicoax mode”.
This amplifier will not work when the Surveyor is in V1422 mode.
Table 6
Recommended Coaxial Cable Types
Cable
Type
Belden
Type No.
Alpha
Type
No.
West Penn
Type No.
Type Center
Conductor
Type Shield and
% Coverage
DCR/
1000 ft
(km)
Distance
(max)
ft (m)
Distance
with Amplifier
(max) ft (m)
RG-11/U 8213 9847 811,4811 14 Solid BC BC braid (95%) 2.6 (8.5) 820 (250) 5000 (1500)
RG-6/U 9248 9804C 806,4806 18 Solid BC Foil + 61% TC
braid (100%) 7.5 (24.6) 530 (160) 5000 (1500)
RG-59/U 8281 9803 815 20 Solid BC 2 TC braids (96%) 9.9 (32.5) 400 (120) 5000 (1500)
RG-59/U 9259 ---- 816 22 Strand BC BC braid (95%) 15.0 (49) 400 (120) 5000 (1500)
RG-59/U 9659 ---- ---- 22 Strand BC BC braid (95%) 15.0 (49) 400 (120) 5000 (1500)
X971 Rev 1098 Surveyor Mini Dome System Reference
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