Assembly Instructions

Navini Networks, Inc. Ripwave Base Station I&C Guide
Part #40-00047-00 Rev F v1.0 (TTA) 243
October 23, 2003
Appendix V: Base Station Calibration Verification
Objective
The objective of this procedure is to verify the transmit power and noise figure of the Base
Station using a Modem.
Test Equipment Required
?? Installed Base Station, powered on and calibrated
?? Navini Drive Test Box
?? PC with Beamforming Display tool installed
?? 4 Fixed Attenuators: two at 30 dB, two at 10 dB.
Low power attenuator acceptable.
?? RF cables and adaptors (3 ft or more)
?? N type Terminator for GPS
Test Procedure
Step 1. If not already done, calibrate the Base Station. Verify a successful calibration by
monitoring the console with “caldebugon”. Verify that the cal error equals zero. If
cal errors are not zero, troubleshoot the system before starting.
Step 2. Prepare the setup that is shown in Figure V1.
Step 3. Connect approximately 30-40 dB of attenuation to one end of the calibration cable.
Connect a 3-6 ft RF cable to the other end of the attenuation. Connect 40 dB of
attenuation to the end of that cable. Connect the attenuators to the Navini Drive
Test box.
Step 4. Put the Drive Test box as far away from the Base Station as possible. Terminate
the GPS connector. Calculate the path loss from the Drive Test box to the Cal
cable. In the EMS disable carriers 1-2, 3-4, and 9-10, leaving 5-6 and 7-8 enabled.
Also verify that the ACC for 5-6 is selected. This is found by clicking on the BTS
tab, highlighting the specific BTS, then selecting Air Interface > Layer 2 >
Carrier data. Refer to Figure V2.