User's Manual

124 UltraWAVE Micro BTS Installation and Commissioning Guide, Version B
Chapter 5 - On-Line Commissioning
If you do not have a high power sensor, you need to reduce the output power
for the forward power measurement. Connect the appropriate attenuator
(50 Watt or more, 10-20 dB) inline between the Micro BTS RF output port and
the “in” port of the RF watt meter, as shown in Figure 5-5. You must figure the
power loss of both cables and the attenuator in this scenario. You cannot
measure the reflected power using this test setup. You must use the setup
without the attenuator, as shown in Figure 5-4, making sure the power sensor
direction arrow points toward the Micro BTS.
6 Work with the OMC operator to ensure that the OMC is configured so that the
BCCH is on the TRX you are testing.
7 To measure forward (output) power, the arrow on the power sensor should
point toward the antenna, as shown in Figure 5-4.
8 At the OMC, change the TRX state to unlocked. The operator should be sure
that the output power for the TRX under test is set to “Static Power Control
Level 0” (full power). Note the ONLINE LED for the TRX under test turns green
at the Micro BTS site.
9 In the serial session at the Micro BTS site, enter the following commands to
display the power control status for each TRX.
bts-> log_none
bts-> isr_debug_calb=1
Figure 5-5: Attenuated Power Connection
The procedure for BCCH configuration can be found in the
Network Configuration section of the UltraVIEW OMC
Configuration Guide.
RF Power Meter
Equipment
Antenna
Connector
IW041304
RF cable
Attenuator
RF cable
RF cable to Antenna