User's Manual

WLS Installation and Maintenance Manual Installation
Geometrix
®
Wireless Location System 26
Andrew Corporation Proprietary
BPU 0:PASS
BPU 1:PASS
BPU/RX Test Result: PASS
Press any key to continue.
Tests on BPU 1 are only executed in the case of a 4-channel (TDOA-4 or AOA) WLS. Failure of
the BPU/RX test indicates an internal WLS component fault. The failed unit should be returned
for repair.
2.10.4 Noise Channel Correlation/Power Test
The Noise Channel Correlation/Power Test software is used to check the RF signal path within
the WLS. A noise signal generator, installed as a test source in the internal (Figure 2-11 ) or
external (Figure 2-12 ) antenna switch, is activated in the front-end of the WLS RF signal path.
Signal levels are measured at the back-end and compared to each other (correlated) to check the
connections and components along the path. The test is performed for each channel of each
installed BPU/Rx.
Figure 2-11 Noise Source, TDOA Site
Figure 2-12 Noise Source, AOA Site
An example of the test display is shown below:
Enter your choice: 4
NOISE CORRELATION/POWER TEST:
Testing A-Band Cellular Frequency: 830.00 MHz
Iter BPU Rho S/N(dB) pow_ch1(dBm) pow_ch2(dBm) TOAdiff(ns) Status
1 0 0.987 15.64 -88.9 -89.4 1.3 PASS
2 0 0.986 15.35 -89.0 -89.6 2.3 PASS
3 0 0.986 15.37 -89.1 -89.6 1.0 PASS
4 0 0.986 15.37 -89.1 -89.7 1.8 PASS
5 0 0.985 15.28 -89.2 -89.7 1.8 PASS
6 0 0.986 15.34 -89.2 -89.7 1.3 PASS
7 0 0.986 15.49 -88.9 -89.5 1.0 PASS
8 0 0.986 15.39 -89.1 -89.6 0.2 PASS
9 0 0.986 15.40 -89.2 -89.7 2.8 PASS
10 0 0.986 15.33 -89.1 -89.6 1.2 PASS
Noise Test for CELLULAR A band: PASS
Noise Source
Antenna Switch
Receiver
BPU
External Antenna Switch
Control Cable
RFDU WLS
Noise Source
External Antenna
Switch