User's Manual

3CC12425AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 03 35/70
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4 – Commissioning the 7390 Terminal Station
4.1 – Commissioning the X-Pol RT
4.1.1 – X-Pol RT adjustment
4.1.1.1 – Overview
This chapter describes how to align an X-Pol RT by adjusting the azimuth, elevation and vertical angle
of an X-Pol RT. The procedure requires a minimum distance of 100 m (328 ft) between the BS and the
X-Pol RT.
The procedure also requires clear weather conditions and a clear line-of-sight between the BS and the
X-Pol RT. There must not be any obstacles in the clear line-of-sight within the following distances:
– within 4 m (13 ft) for a TS site up to 6 km (3.8 mi) away,
– within 7 m (23 ft) for a TS site between 6 and 10 km (3.8 to 6.2 mi) away
.
Lists the equipment needed to align the X-Pol RT.
The following information is required before the X-Pol RT is aligned.
– approximate distance and elevation/depression angle (with respect to the horizontal) between the
TS site being installed and the BS,
– expected upstream and downstream operating frequencies assigned to the NT,
Note: Alcatel Broadband Wireless equipment should only be installed by qualified individuals
who are trained and certified for the type of installation task assigned to them.
Equipment Purpose
Recommended
supplier
Spectrum analyzer Measures signal strength Anritsu Site Master
S332B or equivalent
Bias-T (75Ω) Provides connectors for dc supply voltage to
X-Pol RT, and for protect spectrum analyzer
Pulsar BT-G1-411F75
or equivalent
50/75Ω coaxial mat-
ching pad (5.7 dB loss)
Provides impedance match for spectrum analy-
zer (50 Ω connector: SMA(F)), 75 Ω connector:
F(F))
Inmet Model 9088-50/
75 or equivalent
RF test cable, 1 m (3 ft)
in length, minimum
Connects Bias-T to spectrum analyzer through
the 50/75 Ω matching pad
Two cable lengths needed:
– Bias-T to pad: requires an F(M) connec-
tor at each end
– pad to analyzer: requires SMA(M) and
spectrum analyzer connectors
Same as IF cable or
equivalent
Coaxial jumper cable,
any length
Connects NT to Bias-T, providing dc supply
voltage to X-Pol RT Requires an F(M) connec-
tor at each end
Same as IF cable or
equivalent