Semight-SUPPORT-FAQ-Semight Instruments

Q&A

Common Problem

Product category

？Q

What is the meaning of msblsb? What's the relationship with TX ±?

A

High bit MSB, low bit LSB, MSB / LSB correspond to digital bit coding
TX ± refers to the positive and negative poles of the differential signal, and corresponds to analog comments
For each pam4 symbol (2bits), the method of converting digital code into analog level is MSB + LSB / 2 to achieve output changes of four levels
？Q

What are the composition, rules and applications of the error code test instruments jp03a, jp03b and square?

A
？Q

Does optical power meter OPM support automatic coupling?

A

I won't support it
？Q

Does optical power meter OPM and VOA support GPIB communication? Or can I go through visa?

A

No, only USB & network port communication is supported
？Q

Why can optical power meter OPM test burst power?

A

No, only intelligent continuous light can be tested.
？Q

Why is OPM power monitoring inaccurate?

A

(1) : first check whether the end face of the optical fiber is dirty (you can check the state of the end face with the end face detector), and then clean the lower end face with a cleaning pen or a face tag.
(2) Check whether there is dirt on the lower PD end face (after unscrewing the adapter, clean the lower PD end face with some alcohol that is still stuck gently).
？Q

Why can't optical power meter communicate with OPM USB & network port?

A

a. If it is USB communication: first check whether the serial port driver is installed. You can go to the device manager to see whether the corresponding COM port can be recognized normally.
b. For network port communication: ensure that the device IP and the PC Ethernet IP are in the same network segment (the default factory IP is 192.168.1.8 port: 20108). You can read and set the device IP on the info interface through the USB connection GUI.
？Q

What wavelengths does multimode VOA optical attenuation support?

A

The default factory calibration wavelength is 850
？Q

What is the type of multimode VOA interface?

A

UPC

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