CATV Underground Trunk Coaxial Cable QR540
QR 540M(QR 540M)
Description:
l center conductor: Φ0.124(3.15mm) solid copper or CCA
l dielectric: Φ0.514(13.05mm)foam PE
l shield: Aluminum tube, thickness 0.540(13.72mm)
l jacket: Φ0.610 (15.49mm) (LDPE) thickness:0.0357(0.89mm)
l messenger steelΦ0.109(2.77mm)
l jelly/ADP: per customer special requirement
Mechanical characteristic
l Minimum Bend Radius: 4.0(10.2cm)
l Maximum pulling tension=220Ibs.(100kgf)
Electrical performance
l Impedance: 75+2 Ohm
l Capacitance: 50+3pF/m
l Velocity of Propagation: 88%
l Nominal DC loop resistance@ 68°F: 4.27 Ohms/1000 ft. (14.01 Ohms/km)
Attenuation
attenuation@ 68°F (20°C):
@ Frequency MHz
dB/100 ft. (MAX.)
dB/100 meters (MAX.)
5 MHz
0.14
0.46
55MHz
0.47
1.54
83 MHz
0.58
1.90
211 MHz
0.95
3.12
250 MHz
1.03
3.38
300 MHz
1.13
3.17
350 MHz
1.23
4.30
400 MHz
1.32
4.33
450 MHz
1.40
4.59
500 MHz
1.49
4.89
550 MHz
1.56
5.12
600 MHz
1.64
5.38
750 MHz
1.85
6.07
865 MHz
2.00
6.56
1000 MHz
2.17
7.12