Installation Manual Part 5

PRELIMINARY
D-2
BWX 8415 Basestation Installation and Commissioning Guide
OL-19519-01
Appendix D RF Center Frequency and Interference Analysis Guidelines
Spectrum Analyzer Settings
Required Equipment
You will need the equipment shown in Table D-1 to complete the interference testing.
Ta b l e D-1 Required Equipment
Spectrum Analyzer Settings
There are two types of interference tests conducted under either the Pre-installation or Post-installation
situation: Frequency Domain test and Time Domain test. The following section explains some specific
settings on the Spectrum analyzer, and what effects they will have on these tests.
Frequency Domain Test
The Frequency Domain test is a measurement of the amplitude of an incoming signal across a given
frequency span. Setup for the Spectrum Analyzer:
• Frequency = the channel to be tested (refer to frequency charts later in procedure)
• Bandwidth (BW) = 100 KHz or lower
• Reference Level = –50 dBm
• Attenuation = 0 dB
• Preamp, if available = on
• Span = determined by the start and stop frequencies
For the Frequency Domain test, the two parameters most frequently configured incorrectly are Reference
Level and Bandwidth. To help the user determine the best settings, this section gives a short description
as to what changes will be seen on the display if the parameter is changed.
Equipment Comments
HP4404B, FSH3, or FSH6 Spectrum Analyzer (or
equivalent)
NOTE 1: If checking for 3.4/3.5 GHz spectrum,
make sure the Spectrum Analyzer reads up to 4
GHz.
NOTE 2: An equivalent analyzer must have the
following functions: Screen Save abilities,
Max-hold function, Peak search, and ability to
operate in the required frequency range
BWX Basestation Antenna Test Box
QMA, N Type Connectors, and different RF
cables to make the connections
Test antenna in the given frequency range Cisco BWX Basestation Antenna
LNA in the given frequency range - With a standard antenna you need an additional
30 dB of gain