Relationships among the node gain compensation offset, line attenuation, and node gain


Node gain compensation offset is an NMS parameter used during ALC configuration. This parameter needs to be set when the upstream and downstream OA boards produce different nominal output power values. The parameter is used to adjust the gain compensation value of a node. After the compensation is complete, a wider gain range or attenuation adjustment range of the node is allowed. When the gain detected on the node is abnormal, gain compensation offset increases or decreases the anomaly threshold of the node. The following formula is used to compute the gain compensation offset of a node:
Compensation offset for the node = Line attenuation �?Node gain + Nominal output optical power difference between upstream and downstream OA boards
If ALC is configured in E2E mode, this parameter can be automatically computed since V100R007C02.

Other related questions:
Relationship between the gain and noise figure of an EDFA
The noise figure (NF) of an EDFA can be calculated according to the following formula: NF = Pase/(H*V*Δv;V*G) NF: noise figure Pase: noise per 0.1 nm H: Planck constant [6.6260755 ± 0.0000040) x 10-34J-s] V: signal frequency Δv: 12.5 GHz (0.1 nm) G: OA gain Obtain the logarithm: Pase = NF + G �?58 According to the preceding information, a larger OA gain results in a larger NF.

Is the antenna gain determined during production? Can the antenna gain be adjusted
No, the gain is a fixed attribute of an antenna and cannot be adjusted.

Querying the nominal gain and actual gain of an E3OAU board through the CLI
1. Query/Set the current nominal gain of the board by running the :cfg-get/set-stdgain:bid,4,1 command. 2. Query the current actual gain of the board by running the :cfg-get-gain:bid,4,1 command. 3. The actual gain is the optical power of the OUT port minus the optical power of the IN port.

Gain range of the TN11OAU103 board
The gain range of the TN11OAU103 board is 24 dB to 36 dB.

Causes for setting the gain of the OAU board to a value greater than the maximum gain permitted by the board
1. The input optical power is excessively low. 2. The insertion loss between the TDC board and the RDC board is excessively large. 3. The required OA type cannot satisfy the optical power requirements for system design.

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