User's Manual

USER MANUAL FOR COMFLEX 6100 1W
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Page 57
power, so the total output power will be (input A+gain) + (inputB+gain)+…+(inputN+gain). For example, if
there are two 1900MHz bands acess to MU, each has 10dBm input power, the total output power of RU
1900MHz will be 30dBm+30dBm=33dBm.
For Multi-channel same band access, 800+850 (which share the same PA) access and 700 Uper C +
LowerABC (also shared PA), they all will have power superposition. In this situation, users need to adjust
system gain manually; otherwise, the output power will be higher than 32dBm which will trigger alarms
(See Chapter 6 for details).
Refer to the method below for the gain adjustment:
Suppose a band with N independent inputs, each input signal power are all X dBm. Apparently, there
exists the following relationship between input and output after finished auto communication on WEB GUI:
X dBm + Gain = 30dBm, then the total output power for N channels access is X dBm + Gain + 10*Log(N)
= 30 + 10*Log(N), so Users need to set 10*Log(N) RFU ATT on WEB GUI for each channel.
End of Section