User's Manual

mBSC0800S-005-RUCM11
MBSC2100-005-RUCM11 April 15, 2013
Page 64
Figure 49 – Up/Down Link Verification
5.4.4.2 Using Uplink Pilot Tone Generator
Each RU in the remote node is equipped with an Uplink Pilot Tone Generator which will generate a CW RF
tone out of the RU back towards the FIU and BIU.. By measuring the RF power at the RXout port of the BIU
the end-to-end uplink system gain can be verified, and band-to-band / node-to-node, variations calibrated
without additional test equipment required at the Remote Node.
Verify the end-to-end Uplink Gain for each frequency band as follows:
1. Click on the RU for the desired frequency band. The component window ;will pop up as shown in
Figure 49 – Up/Down Link Verification
a. Uplink Pilot Frequency:
Set the frequency to the center of the spectrum to be used in the
system (if the operator licensed bands are not known set the frequency to center of the
band)
b. Uplink Pilot Frequency Switch:
select ON from the drop-down box
c. Click Save to turn the Uplink Pilot generator ON
2. Connect an RF power meter to the corresponding RXout port of the BIU
a. A -6 dBm value in the Uplink Pilot Frequency Output Power field of the RU corresponds to an
equivalent signal of -60 dBm at the input to the RU
b. Variations in filtering, amplifiers, and optical loss may cause the actual system gain to vary +/-
6 dB. All paths can be normalized by adjusting uplink attenuation settings in the BIU.
3. This procedure should be repeated for each frequency band in the system
Note: Uplink Pilot Frequency Switch should be off during normal operations. This function is intended for testing, verifying,
and adjusting uplink performance and will interfere with normal operation of the system.