Huawei MA5833-BS60 Commissioning Manual page 23

MA5833-BS60
Hardware Commissioning Guide
Level L
point =
(Highest frequency – Lowest frequency) +
(ATT1 = 0, EQ1...
AMP2 total output power P
Lamp2_chn/10
10
When the Tx power meets the requirements, ensure that the output power of the AMP2 and
AMP1 amplifiers is not saturated.
Calculation method for the AMP1 total output power P
1.
2.
3.
Calculate P
output power of the RF OUT port is high. To reduce this power, reduce the expected output
power of the RF OUT port.
Configuring manual adjustment of the downstream output power
Issue 01 (2018-12-12)
NOTE
Prerequisite
l Frequency planning
l Expected EQ1 and EQ2 values
of the channel (channelx) whose center frequency is at the AMP2 output
amp2_chx
Output power of a single CMC channel
+ Gain of AMP2
)
NOTE
l Maximum downstream frequency: 1218 MHz
l Minimum downstream frequency: 85 MHz
NOTE
Prerequisite
l Frequency planning
l Output level on an RF OUT port@1218 MHz
l Expected EQ1 and EQ2 values
Calculate the level of each channel on the RF OUT port based on the output level on an
RF OUT port@1218 MHz. For example, calculate the level L
center frequency is x MHz as follows: L
Lowest frequency) x (x – Lowest frequency) + Output level on an RF OUT port@1218
MHz – (EQ1 + EQ2)
Level L of the channel whose center frequency is x MHz on the AMP1 output
amp1_chx
point = L Gain from the AMP1 output point to the RF OUT point
–
chx
AMP1 total output power P
Lamp1_chn/10
10 )
NOTE
l Maximum downstream frequency: 1218 MHz
l Minimum downstream frequency: 85 MHz
. Determine whether AMP1 is of the saturated power. If yes, the expected
amp1_total
NOTE
Saturated output power of AMP1 ≈ 72 dBmV
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– EQ1 x (Highest frequency – x)/
Gain from the DS to the AMP2 input point
(assuming ATT1 = 0)
= 10 x lgΣ (10
amp2_total
= (EQ1 + EQ2)/(Highest frequency –
chx
= 10 x lgΣ (10
amp1_total
6 Configuring Intelligent RF Adjustment
Lamp2_ch1/10 Lamp2_ch2/10
, 10
:
amp1_total
of the channel whose
chx
Lamp1_ch1/10 Lamp1_ch2/10
, 10
, ...
, ...
20