User's Manual

Advanced RF Technologies, Inc.
63
Total input per band
10.0dBm
10.0dBm
HE Total Input
13.0dBm
The RFU can now be commissioned with the 10dB of attenuation by using a DL input commission level of
18dBm.
Table 7-6 HE maximum downlink input level after adding 10dB attenuator to HE downlink input port
WSP AT&T
Total input per band 10.0dBm 10.0dBm
Back off per band for breathing 5.0dB 5.0dB
Estimated Total Max Input per band
15.0dBm
15.0dBm
Estimated Total Max Input
18.0dBm
Available Max Input
25.0dBm
7.2.2.1.2.3 Multiple WSPs’ signals exist in the PCS band (with power ratio)
Table 7-7 displays all the various incoming DL signals that are entering into the HE PCS BCU. The ADX-H-BCU
has total 3 input ports and in the example below each port has been assigned to Sprint, AT&T, and VzW.
Table 7-7 Input signal conditions @HE BCU downlink input
WSP Sprint- CH1 AT&T- CH2 VzW- CH3
Technology
CDMA
GSM
WCDMA
CDMA
Total input per band
5.0dBm
10.0dBm
10.0dBm
7.0dBm
BCU Total Input 14.5dBm
x Calculate maximum DL input level for each WSP factoring in the back-off values.
Table 7-8 HE maximum downlink input level
WSP Sprint- CH1 AT&T- CH2 VZW- CH3
Total input per carrier
5.0dBm
10.0dBm
10.0dBm
7.0dBm
Back off per band for breathing 4.0dB 5.0dB 5.0dB 4.0dB
Estimated Total Max Input per carrier 9.0dBm
15.0dBm
15.0dBm
11.0dBm
18.0dBm
x Based on the calculated maximum DL input level for each port, the user should decide on a target maximum
Input power for each BCU port.
- Targeted maximum Input power for each BCU port should not be less than the calculated
maximum DL input level for each port and should not exceed the maximum input level, 25dBm.
Table 7-9 Targeted maximum input power
WSP Sprint- CH1 AT&T- CH2 VZW- CH3
Targeted maximum input power
9.0dBm
18.0dBm
11.0dBm
19.2dBm
Targeted DL Output Power Ratio set by user
30.0%
20.0%
50.0%
x Calculate the DL maximum output power of BCU based on targeted maximum Input power for each BCU port.
- The highest power ratio that has been set is VZW- CH3 @ 50%. The ADX-H-BCU will apply
attenuation to this port to set the maximum output power to 5dBm, therefore 6dB of
attenuation will be applied to this port.