User Manual

Chapter 14 ● Calibrating transmit power
170 Release 2.0, 910056 Rev01d
Understanding the transmit power calibration process
This process explains the procedures to measure antenna jumper attenuation and to calibrate transmit power
for each sector accordingly.
1. Understanding calibration purpose and requirements
See Understanding calibration purpose
on page 171.
See Understanding requirements
on page 171.
2. Opening two CLI/telnet sessions
Simultaneous CLI sessions are needed to the local IP-RN 8000 and the remote IP-RNC 8500. This
requires that the laptop is connected to the BIO/SC craft Ethernet and that IP is configured
appropriately.
See Understanding the need for simultaneous CLI sessions
on page 171.
3. Enabling the BTS and checking the connection with the IP-RNC 8500
Enable the BTS function of the IP-RN 8000 and verify the connection with the IP-RNC 8500.
See Enabling the base station and checking the IP-RNC 8500
on page 172.
4. Verifying GPS status
Verify that GPS is locked and time is acquired.
See Verifying GPS status
on page 172.
5. Disabling all sectors
All sectors must be disabled (transmission must be stopped) before continuing with the calibration.
See Disabling all sectors
on page 174.
6. Calibrating each sector’s power transmission offset
Perform the following procedures in sequence for each sector deployed:
a. Attach the test equipment to the sector’s transmit jumper antenna cable
See Attaching the sector’s test equipment
on page 176.
b. Enable and blossom the sector
See Enabling and blossoming the sector to be calibrated
on page 178
c. Start the FTAP test for the sector
See Starting FTAP for the sector
on page 179.
d. Measure the power loss at the end of the sector’s transmit antenna jumper cable at three levels and
find the average loss.
See Measuring power loss for the sector
on page 180.
e. Set the sector’s transmit power.
See Setting the sector’s transmit power
on page 181.
f. Verify the sector’s transmit power level
See Verifying the sector’s power level
on page 182.
g. Shut the sector down, remove test equipment, and re-connect the antenna
See Completing the sector’s transmit power calibration process
on page 183
This procedure is complete. You must run the commissioning script to configure the node for normal
operations. Go to Understanding the backhaul link loopback test process
on page 158.