Twisted Pair Cable Specifications
The cables are the most important part of a Twisted Pair Video installation, and the overall
performance and transmission distance, depends on the selected twisted pair cable.
Please note, that twisted pair cables with stranded conductors are NOT suitable -
the conductors must be solid.
When shielded cables are used the transmission distance might be considerably lowered,
due to the higher capacitance introduced by the shield - carefully study the specification
on the actual cable and compare them with the table below. The choice between shielded
and unshielded cable will always be a compromise between transmission distance and
immunity towards noise and crosstalk.
pcs./m
5
Twists
dB/km
30-36
Attenuation @ approx. 5 MHz
nF/km
90
Capacitance
Ω
130
120
100
Characteristic impedance @ <1 MHz
mm
1
0,6-0,8
0,5
Solid conductors, diameter (ø)
Unit
Max.
Typ.
Min.
Description
Suitable cable types:
Standard Category 5e.
Belden 1700A.
Belden 1872A.
Mödinger A-2Y(L)2Y / 2x2x0,6 (2 pairs).
Note: When using cables including several not individually screened pairs, it is, as a
general rule, not recommended to use more than one pair per cable, in order to avoid
possible crosstalk.
Note: When using cables including several not individually screened pairs, do not mix long
and short cable distances, in order to avoid possible crosstalk.
Note: Avoid locating unscreened twisted pair cables parallel to high speed data cables,
mains cables, or other cables with high energy and/or high frequency signals.
EMC/EMI
All electronic equipment can emit, or be sensitive to, induced electromagnetic noise which
can be conducted by the connected wires, or transmitted as electromagnetic fields.
Electromagnetic noise can cause malfunction or damage to the equipment.
The Series 230 fulfils the relevant EMC standard (refer to specifications) and is therefore
CE labelled.
WARNING: The stated approvals, and other specifications are valid only if
the equipment is installed according to the instructions in this manual.
2800-00087
