Cisco BWX 8305 Installation And Commissioning Manual page 58

BWX 8305 Basestation Antenna Installation
Never connect the Cisco BWX Basestation Antenna Test Box to the Calibration (Cal) port on the BS or
Caution
to other test equipment. The output voltage may destroy the equipment.
Be sure to power down the Test Box each time you change cables to sweep. Failure to do so may damage
Note
the Test Box.
6.3.10.6 Procedure to Measure TX Path Gain or Loss
Do not attempt to sweep the BWX 8305 Basestation Antenna while it is on cement or metal, as this can
Note
cause reflections that misconstrue the data.
Using
Step 1
Connect the Signal Generator to the JP-2 on the Test Box side, and JP-1 to one of the RF ports on the
Step 2
BWX 8305 Basestation Antenna. Connect the BWX 8305 Basestation Antenna Cal port to the Spectrum
Analyzer.
Step 3 Power up the Test Box.
Measure the gain or loss introduced by this path through the BWX 8305 Basestation Antenna. Repeat
Step 4
the procedure for each path. Check the SA value to the printed values that accompanied the Antenna. If
there is a large discrepancy, check the connections and repeat the sweep.
Step 5 Subtract the loss at the Test Box.
Step 6 Repeat Steps 4 and 5, connecting the cable from JP-1 to the other RF port.
Step 7 Turn off the RF signal. Change the frequency and repeat this process for the High and Low frequencies
(matching the printed sheet that came with the antenna).
Step 8 Power down and remove the Test Box.
6.3.10.7 Procedure to Establish the Receive (RX) Path Reference Level
Step 1 Set up the equipment, as shown in
Spectrum Analyzer span, bandwidth resolution, video bandwidth, sweep, and frequency.
Connect the Signal Generator to the Spectrum Analyzer using 3 segments of N-type terminated test cable
Step 2
and 2 F-F barrel connectors.
Turn on the RF signal.
Step 3
Adjust the Signal Generator signal until the value in the Spectrum Analyzer is approximately –20dbm.
Step 4
Make sure the Test Box is not connected to power.
Step 5
BWX 2305 Basestation Installation and Commissioning Guide
6-22
Figure 6-21 above as a guide, insert the BWX 8305 Basestation Antenna and the Test Box.
Figure 6-20, for Signal Generator amplitude and frequency, and for
Chapter 6 Installation
OL-16336-02