Function comparison of optical spectrum analyzer units MCA and WMU on OSN 6800

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1. MCA boards are classified into MCA4 and MCA8, which provide four and eight ports respectively. An MCA board is mainly used to detect channel optical power, center wavelengths, optical signal-to-noise ratio (OSNR), and the number of wavelengths on an optical path. Similar to an optical spectrum analyzer, an MCA board reports the detected information to the system control board for fault diagnosis and monitoring. In addition, an MCA board can be used together with other boards to implement the automatic power equilibrium (APE) function.
2. The core function of a WMU board is to work with the system control board to lock wavelengths and monitor the wavelength offset of the transmit-end OTU board. The monitoring information is sent to the system control board by email. Then the system control board determines whether to adjust the wavelengths based on the wavelength configuration table. If wavelength adjustment is required, the system control board sends the adjustment information to the OTU board and then adjusts the wavelength offset.
3. An MCA board can monitor both the transmit end and receive end.
4. A WMU board can be configured only at the transmit end because it must work with the system control board at the local site to adjust the wavelength offset of the OTU board at the local site.
5. An MCA board mainly facilitates maintenance and a WMU board is used for function implementation. If an OTU board with 100 GHz channel spacing is used to implement a C-band 80-wavelength system, a WMU board needs to be configured to lock the operating wavelength of the OTU board. This is because the OTU board with 100 GHz channel spacing cannot satisfy the stability requirements of an 80-wavelength system, but the WMU board can help stabilize the wavelength performance.

Other related questions:
Functions of spectrum analyzer units MCA and WMU on OSN 6800
Question: When an OSN 6800 device is used to construct a new network, two spectrum analysis units are configured: multi-channel spectrum analyzer unit (MCA) and wavelength monitoring unit (WMU). The functions of these two boards seem to be overlapped. How do we understand these functions? Answer: 1. MCA boards are classified into MCA4 and MCA8, which provide four and eight ports respectively. An MCA board is mainly used to detect channel optical power, center wavelengths, OSNR, and the number of wavelengths on an optical path. Similar to an optical spectrum analyzer, an MCA board reports the detected information to the system control board for fault diagnosis and monitoring. It can also be used together with other boards to achieve the automatic power equilibrium (APE) function. 2. A WMU board works with the system control board to lock wavelengths and monitor the transmit-end OTU wavelength deviation. The monitoring results are transmitted to the system control board through mailbox. Then, based on the wavelength configuration table, the system control board determines whether wavelengths need to be adjusted. If the wavelengths need to be adjusted, the system control board transmits the adjustment information to the OTU board to complete the wavelength deviation adjustment. 3. An MCA board can be configured to monitor the transmit end and receive end.4. A WMU board can be configured only at the transmit end, because it is used to adjust wavelength deviation of the OTU board at the local station with the system control board. 5. An MCA board is easy to maintain. A WMU board provides functions. To use OTU boards with 100 GHz spacing in an 80-channel system in the C band, WMU boards need to be configured to lock the working wavelength of OTU boards. If the working length stability of OTU boards with 100 GHz spacing cannot meet the requirements of an 80-channel system, WMU boards can be used. Suggestion and conclusion: An MCA board is used to monitor optical signals. A WMU board is used to monitor optical signals and lock and control the OTU wavelength with the system control board.

Threshold of the input optical power of a WMU board in the OSN 6800
For the WMU board in the OSN 6800, its single-wavelength input optical power must be in the range of �?6 dBm to �?6 dBm.

Rate comparison of optical ports on SC1 and SC2 boards on OSN 6800
1. Optical ports on SC1 and SC2 boards of OSN 6800 support two rate modes. In the networking containing OSN 6800, the rate 16.896 Mbit/s is used for the interconnection with the SC2 or SC1 board, and the rate 4.096 Mbit/s is used for the interconnection with an OSC board on BWS 1600G. 2. No rate mode needs to be set on the NMS. This is because the rate is auto-sensing and determined by boards.

Principle for the MCA board to implement optical spectrum scanning
The MON port of a monitored board outputs weak optical power through an optical splitter. After being connected to the MON port of the board, the MCA board performs appropriate compensation so that the MON port output power of the monitored board is close to the actual optical power output by the OUT port of the monitored board.

Can spectrum be analyzed? If yes, how can I analyze it
Airmagent, DingLi WiFi Monitor, WLAN tools of TuZhi Company and sniffer can analyze and simulate spectrum. eSight can also provide detailed spectrum analysis.

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