Huawei MA5833-BS60 Commissioning Manual page 21

MA5833-BS60
Hardware Commissioning Guide
Module
ATT3
EQ1/EQ2
ATT4
ATT5
EQ3
EQ4
ATT6
ATT7
Calculation Methods
In manual adjustment, the attenuator and equalizer of the combiner can be configured directly.
In the Downstream Direction
In manual adjustment, configure ATT1–ATT3 and EQ1–EQ2 based on the network planning
to make the Tx power of the RF OUT port meet the requirement.
Formulas of calculating the attenuation
Output level on an RF OUT port@1218 MHz = Output power of a single CMC channel –
ATT1 + Gain from the DS to the AMP2 input point + Gain of AMP2 + Gain from the AMP2
output point to the AMP1 input point + Gain of AMP1 – ATT3 + Gain from the AMP1
output point to the RF OUT point
Output level on an RF OUT port@1218 MHz = Power of digital TV signals output by Rx +
Gain from the Rx to the AMP3 input point + Gain of AMP3 – ATT2 + Gain from the AMP3
output point to the AMP2 input point + Gain of AMP2 + Gain from the AMP2 output point to
Issue 01 (2018-12-12)
NOTE
Equalization (EQ) and attenuation can be adjusted remotely.
Copyright © Huawei Technologies Co., Ltd.
6 Configuring Intelligent RF Adjustment
Function Description
Indicates the adjustable attenuator of
combined downstream DOCSIS and CATV
signals.
Indicates the adjustable equalizer of
combined downstream DOCSIS and CATV
signals.
Indicates the adjustable attenuator of
combined upstream Group 0 DOCSIS and
Tx0 signals.
Indicates the adjustable attenuator of
combined upstream Group 1 DOCSIS and
Tx1 signals.
Indicates the adjustable equalizer of
combined upstream Group 0 DOCSIS and
Tx0 signals.
Indicates the adjustable equalizer of
combined upstream Group 1 DOCSIS and
Tx1 signals.
Indicates the adjustable attenuator of
upstream Tx0 signals.
Indicates the adjustable attenuator of
upstream Tx1 signals.
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