User Manual

Chapter 14 ● Calibrating transmit power
182 Release 2.0, 910056 Rev01d
Verifying the sector’s power level
This procedure explains how to verify the sector’s calibration.
Requirements
A CLI session to the IP-RN 8000
Procedure
1. At the CLI session to the IP-RN 8000, use the following commands to set the power level to 25 dBm:
AIRVANA-03>enable
AIRVANA-03#configure
AIRVANA-03(config)#sector-element element1/4/1
AIRVANA-03(config-element)#tx-power 25
AIRVANA-03(config-element)#no shutdown
These commands configure the first sector (identified by element1/4/1).
• To configure sector 2, use: sector-element element1/4/2.
• To configure sector 3, use: sector-element element1/4/3.
2. As a result of these commands, the sector transmission blossoms. Wait until the power meter shows a
stable power level and write it down.
3. Change the transmit power level for the sector to 35 dBm using the following:
AIRVANA-03(config-element)#tx-power 35
4. The sector transmission blossoms. Wait until the power meter shows a stable power level and write it
down.
5. Change the transmit power level for the sector to 45 dBm using the following:
AIRVANA-03(config-element)#tx-power 45
6. The sector transmission blossoms. Wait until the power meter shows a stable power level and write it
down.
7. Analyze the results to see if calibration is successful.
All three measurements should be within 1 dBm of the transmit power set with the tx-power
command after compensation for the power loss in the power coupler and attenuator pad.
• If all three results after compensating for the power splitter and attenuator pad are within 1 dB of
the power level set, the sector’s transmission power has been calibrated successfully.
• If any of the three results after compensating for the power splitter and attenuator pad are not within
0.5 dBm of the power level set, the sector’s transmission power has not been calibrated
successfully.
8. At this point you can optionally connect a radio frequency spectrum analyzer to the Tx sample port on
the PA module for the sector and analyze the wave form for correctness. For information about the Tx
sample port, see Understanding the Power Amplifier module on page 18.
This procedure is complete.