Assembly Instructions

Navini Networks, Inc. Ripwave Base Station I&C Guide
Part #40-00047-00 Rev F v1.0 (TTA) 245
October 23, 2003
Step 5. Connect approximately 20-40 dB of attenuation to the end of the calibration cable.
Connect a 3-6 ft RF cable to the other end of the attenuation. Connect the
remaining attenuation to the end of that cable. Connect the attenuators to the
Navini Drive Test box.
Step 6. 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.
Step 7. Disable all PAs except PA #1.
Step 8. From the Beamforming, verify that the Receive Sync from the Drive Test Tool is
approximately –80 dBm. If not, adjust the value of the attenuators accordingly.
Step 9. Start an upload of a large file or ping continuously with packets 3,000 bytes or
greater. You need to acquire at least 20 code channels in one sub-carrier. If the
number of code channels is less than 20, start an additional ping sessions.
ping <ip_address> –l 3200 –t
Step 10. Capture the following parameters from the BTS Beam-forming display. Refer to
Figure V3:
Downlink: SYNC Recv Sgl Strength (dBm)
Uplink: SNR (dB)
Uplink: TCC Recv Sgl Strength (dBm)
Step 11. Capture the same parameters as in Step 10 for each of the remaining PAs, one by
one. That is, with PA #2 turned on and all other PAs turned off ; then with PA #3
turned on and all other PAs turned off; etc.
Step 12. Use the spreadsheet and input all the captured parameters to calculate the Tx
power and Noise figure.
Step 13. Measure and record attenuation value.