Precautions for physical connections of the MCA board during the project design

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Question:
What are the precautions for physical connections of the MCA board in project design?
Analysis:
None
Root cause:
MCA is a 4- or 8-channel spectrum analyzer that supports functions and features such as optical spectrum analysis, optical power detection, and APE. Pay attention to the following for the physical connections:
1. For an OTM or OADM site, connect the IN1 port to the east transmit port, IN2 to the east receive port, IN3 to the west transmit port, and IN4 to the west receive port.
2. For a ROADM site, preferentially connect the MCA board to the OA ports. Connect the IN1 port to the east transmit port, IN2 to the east receive port, IN3 to the west transmit port, and IN4 to the west receive port. Do not connect the MCA boards to the MON ports of boards that can implement the ROADM function. These MON ports provide only the function of optical power detection rather than OSNR and wavelength detection functions.
3. For an ASON network, the MCA board needs to be configured at both the transmit and receive ends of a ROADM site. In addition, the MCA board needs to be configured at the local transmit end.
4. The MCA board cannot be configured in the OSN 1800.
5. The MCA board cannot be configured on the MON ports of the M40, D40, and V40 boards.
Answer:
None

Other related questions:
Precautions for MCA connections in the engineering design
The MCA board is the spectrum analyzer board with four or eight channels. It supports the functions of spectrum analysis, optical power detection, and APE. The precautions for its physical connections are as follows: 1. At an OTM or OADM site, IN1 connects to the east transmit end, IN2 connects to the east receive end, IN3 connects to the west transmit end, and IN4 connects to the west receive end. 2. At a ROADM site, the MCA board preferentially connects to the OA port. IN1 connects to the east transmit end, IN2 connects to the east receive end, IN3 connects to the west transmit end, and IN4 connects to the west receive end. It is not recommended that the MCA board be configured at the MON ports on boards that implement the ROADM function, because the port provides only the optical power detection function but not OSNR and wavelength detection. 3. For an ASON, the MCA board needs to be configured on the transmit and receive ends at the ROADM site. The local dimension is configured at the transmit end. 4. The MCA board does not support the OSN 1800 product. 5. The MCA board cannot be configured for the MON ports of the M40, D40, and V40 boards.

Methods for locating MCA board faults
Question: The MCA board failed to scan the spectrum during a site deployment. MCA monitors 80 channels of four ports. All 320 channels reported the CHAN_LOS alarm. Analysis: 1. No input optical signal on all four ports of the MCA board. 2. The MCA board was faulty. Root cause: None Answer: 1. Detect the R01, R02, R03, and R04 ports of the MCA boards using a power meter and optical spectrum analyzer, and each port had optical power and normal waveforms were observed from the analyzer. 2. Use the following NE commands to check whether the configurations were correct: :cfg-set-monwave:bid,1,cband,1&&80,enable; (Channel 1 is used as an example, other channel can be used as well.) :cfg-get-monwave:bid,1,cband,0; :cfg-verify; (Verification must be performed.) :cfg-get-analydata:bid,1; MAC optical spectrum analysis data query :cfg-verify; Query results of ":cfg-get-analydata:bid,1; MAC optical spectrum analysis data query" for all channels were ?600, meaning that there were no optical signals on any ports. 3. According to previous steps, the MCA board was faulty. The board was unplugged for further analysis. a. Open the fireproof board. b. The module with five fibers at the front of the board is the optical switch. Among the five fibers, the white one is for input, which connects to the front panel; and the blue one is for output. Remove the end with the white fiber of the blue monolithic fiber adapter that is fixed on the board, input optical signals to any one of the R01 to R04 ports, and use the power meter to determine whether the blue fiber has output. When there is no output, confirmed whether the input is normal. If normal, then the optical switch or the fiber adapter is damaged. c. When there is output, confirm whether the OCM (optical spectrum analysis module) is faulty. Re-insert the end with the white fiber, and remove the end with the blue fiber. Connect the white fiber to the MON port of other boards, and make sure that the MON port has OTU wavelength and the fiber connection is correct. Reinsert the board to the subrack. After the board starts running, run the commands for optical port enabling, verifying, and wavelength analyzing. If the queried result of the MCA is still ?600, then the optical spectrum analysis module, the software, or the NE is faulty. For damaged optical switches or faulty optical spectrum analysis modules, replace the board. Suggestion and conclusion: To locate MCA faults, first confirm whether there are input optical signals, then confirm whether the data configurations are correct, and finally confirm whether the hardware is faulty.

Indicator measurement precision of the SSE1MCA board
Question: What is the precision of values measured by the SSE1MCA board in a BWS 1600G system (DWDM system)? Answer: 1. The power monitoring precision reaches ±1 dB. 2. The OSNR under 100 GHz wavelength spacing must reach 25 dB, and the OSNR under 50 GHz wavelength spacing must reach 20 dB. Precision requirements: Under 100 GHz wavelength spacing, the OSNR measurement range is 10 dB to 25 dB. a. When the input optical power is -10 dBm to -30 dBm, the OSNR test precision is ±1.5 dB. b. When the input optical power is greater than -30 dBm and smaller than -40 dBm, the OSNR test precision is ±2.5 dB. Under 50 GHz wavelength spacing, the OSNR measurement range is 10 dB to 20 dB. a. When the input optical power is -10 dBm to -30 dBm, the OSNR test precision is ±1.5 dB. b. When the input optical power is -30 dBm to -40 dBm, the OSNR test precision is ±3.0 dB. Suggestion and conclusion: None

Optical signal indicators detected by the MCA board
Question: What are the optical signal indicators that can be detected by the MCA board? Analysis: None Root cause: None Answer: Optical power, center wavelength, OSNR, and number of channels.

MCA functions
The MCA board is an optical spectrum analyzer board that is used to analyze the optical spectrum of optical signals. The MCA board analyzes the optical spectrum of the input optical signals, and transmits the analyzed and converted data to the control and communication module through the data interface. The control and communication module then reports the data to the SCC board and the NMS. The NMS then displays the final spectrum analysis results.

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