Copyright © 2006 – STM Norway AS
Publication no. 101557, Rev. T, November 3
th
, 2006
Page 88
Appendix H. Cable Specification
This appendix provides the cable specification for use between the ODU and the STM SatLink IDU. Two
separate cables are required, one cable for the transmit (Tx) signal and one cable for the receive (Rx)
signal.
H.1 Cable Requirements
Frequency range:
950-1450 MHz, Tx
950-2150 MHz, Rx
Maximum attenuation:
25 dB, Tx
9 dB + 10logR dB, Rx
R: Minimum symbol-rate (Msps)
Maximum DC resistance:
2.5
Ω
(Tx)
Screening effectiveness:
>60 dB at 1000 MHz
Impedance:
75 Ohm
Connectors:
F-type
Environmental requirements:
Temperature:
-50
°
C to 80
°
C
Humidity:
0 to 100% (Condensing)
Atmosphere:
Salt, Pollutants and Contaminants as Encountered in Coastal and
Industrial Areas
H.2 Recommended cable types
We recommend using cables from Times Fiber.
Type
Outside
diameter (mm)
Attenuation at
1000 MHz
(dB/100m)
Screening at
1000 MHz
(dB)
DC-resistance
(
Ω
/km)
6-series
6.93
21.46
110
40
11-series
10.2
13.88
75
30.4
500-series
14.2
8.30
100
5.61
Table 12: Cables from Times Fiber
For the Rx-cable, amplifiers (or attenuators) may be used. No amplifiers or attenuators must be used on
the Tx-cables.
Recommended connectors:
Moisture proof crimp connectors from Cablecon suitable for the 6-series and the 11-series of cables.
