Huawei MA5833-BS60 Commissioning Manual page 30

MA5833-BS60
Hardware Commissioning Guide
output point 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
ATT2+ATT3=2.1≈2
Table 6-2
Table 6-3 Parameter description
Parameter
Output level on an RF OUT port@1218
MHz
Output power of a single CMC channel
Power of digital TV signals output by Rx
Gain from the DS to the AMP2 input point
(ATT1 = 0, EQ1 = 0)
Gain from Rx to the AMP3 input point
(ATT2 = 0)
Gain from the AMP3 output point to the
AMP2 input point (EQ1 = 0)
Gain from the AMP2 output point to the
AMP1 input point (ATT3 = 0, EQ2 = 0)
Gain from the AMP1 output point to the RF
OUT point
Gain of AMP3
Gain of AMP2
Gain of AMP1
Calculating the Total Output Power of AMP2
Take the channel (channel 114) whose center frequency is 114 MHz as an example:
Level of AMP2 output point: L
14.7) + 32
After the levels of all channels at the AMP2 output point are calculated, calculate the total
output power at AMP2 using the following formula: P
Lamp2_ch120/10
10
Issue 01 (2018-12-12)
describes the parameters in the formulas.
amp2_ch114
Lamp2_ch989/10
,... 10
Copyright © Huawei Technologies Co., Ltd.
6 Configuring Intelligent RF Adjustment
Description
An expected value that is obtained based on
the network planning
Related command: cable downstream
channel-id rf-power value
Value measured using a tester at Rx test
point +20 dB
≈ –14.7 dB
≈ 3 dB
≈ –13.5 dB
≈–6 dB
≈ –11.5 dB
NOTE
This is the gain when a splitter is configured for
the combiner. When a jumper is configured, the
gain is 3.5 dB higher.
≈ 19 dB
≈ 32 dB
≈ 23 dB
= 36 – EQ1 x (1218 – 114)/(1218 – 85) + (–
amp2_total
). The result is: P
amp2_total
Lamp2_ch114/10
=10*lgΣ(10
≈ 68.6 dBmV
,
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