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CRITICALPOINT 700/800MHZ BDA/DAS/BBU V3 USER MANUAL
©2024 Comba Telecom. All Rights Reserved.
568 Gibraltar Drive, Milpitas, CA 95035 | +1 408 526 0180
Rev. 1-0-2 Rev. Date: 11-1-2024
Page: 158
See Figure 134 below for an example of the UL_TAR and UL_GAIN calculation process.
Figure 134: Commissioning Tools UL_TAR and UL_GAIN Calculation Example
Site DL Backoff Calculations:
If there are multiple sites being used with channels in the same frequency band, the user can select all sites
to be included in the DL Channel Power Back Off calculations. The BDA will count total filters from all sites
for DL channel power backoff. If only using one site, just ensure the site you have configured is selected.
In the <Include sites for DL backoff calculations> section of the commissioning tool, select the site(s)
that will be included in the channel count for DL Channel Power Backoff.
Figure 135: Commissioning Tool Selecting Sites for DL Channel Power Backoff Calculations
Donor Site MAX RX RSSI = -75dBm
UL Total Loss = 85dB
UL_TAR = -75dBm + 85dB = 10dBm/Channel
Donor Site MIN RX RSSI = -95dBm
UL Total Loss 1 = 85dB
UL MIN Input = -65dBm
UL_GAIN = -95dBm + 85dB (-65dBm) = 55dB

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