User's Manual

3CC12425AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 03 37/70
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Figure 18 – Test setup for X-Pol RT alignment
4. Using the A7390 Release 2.2b Cable Installation Methods document, determine and record the
IGAU transition radius (ITR).
5. Determine and record the IGAU type from the A7390 Release 2.2b Cable Installation Methods
document based on the actual BS-TS distance relative to the ITR.
6. Using the A7390 Release 2.2b Cable Installation Methods document, determine and record the
required IGAU value (for both upstream and downstream values in the case of the assymetrical
IGAU).
7. Using the A7390 Release 2.2b Antenna Systems Installation Methods document, determine and
record the antenna misalignment transition radius (AMTR).
8. From the A7390 Release 2.2b Antenna Systems Installation Methods document, determine and
record whether antenna misalignment is required based on the actual BS-TS distance relative to the
AMTR and where applicable, record the level of misalignment (normally 15 dB in order to line up with
the side band).
Figure 19 – Antenna misalignment with E-RIT tool
DC IN
RF RF
DC
NT
IF In/Out and
35 VDC Out
Coaxial jumper
cable
X-Pol RT
Lightning
arrester
DC IN
50/75Ω
matching pad
To ac power
Spectrum analyzer
RF test
cable
RF
Bias-T
Rf and DC X-Pol RT IF
cable
NT
X-Pol RT
Lightning arrester
IGAU
E-RIT tool
PC