Semight-SUPPORT-FAQ-Semight Instruments

Q&A

Common Problem

Product category

？Q

How does the second generation of sampling oscilloscope dca4201 record the log log of the instructions sent by the automation software to the upper computer?

A

Select tools SCPI programming tools in the GUI and check it; The log will be saved to the log folder of the upper computer
？Q

How to set the threshold mode of the sampling oscilloscope dca4201 second generation computer when testing mask magin?

A

Mask test setting - select Maunal mode - set the corresponding threshold
？Q

What is the recommended light entry range of the second generation of sampling oscilloscope dca4201?

A

-About 3dB to - 6dbm
？Q

Is there light on the oscilloscope screen of the second generation of sampling oscilloscope dca4201?

A

First, confirm whether the device under test emits light, which can be checked with a power meter; Confirm that there is light on the power meter and no light on the oscilloscope. After the equipment is restarted and connected, conduct dark current calibration and check again; If none of the above works, confirm whether there is light of more than 0dB entering the optical port and damaging the internal devices
？Q

How does the sampling oscilloscope dca4201 display the current temperature of the device and the temperature during calibration on the GUI?

A

Measure configure measurement
？Q

The Er of the sampling oscilloscope dca4201 is unstable or the equipment of competitive products is quite different

A

Before use, it needs to heat the engine for more than 15 minutes to make the equipment reach thermal balance, and then conduct dark current calibration. At this time, the ER brush value is stable; In addition, if there is still a gap between ER and competitive products at this time, ercf compensation can be made. The method is: measure configure measurement - set the corresponding ercf compensation
？Q

Can the new generation of sampling oscilloscope dca4201 be connected with network cable?

A

No, the first generation only supports USB connection
？Q

Sampling oscilloscope dca4201 generation driver can't be installed successfully?

A

Confirm the computer system. If the win10 system needs to disable digital signature, install the driver according to the manual. After the installation is successful, connect the device and see Holly 10g in the device manager
？Q

Why is the jitRMS of the module products tested by the sampling oscilloscope too large, or other indicators are poor?

A

a. Bert's high-frequency signal and trigger cable are not plugged properly --- check the cable connection
b. The inside of the optical port flange interface is dirty, or the optical fiber is dirty --- clean the port
c. The optical power is not in the proper range --- generally, the optical power is in the range of - 3 ~ - 6dbm, and better test results can be obtained by increasing the optical power
d. If a single end is used, whether it is matched at differential termination -- both ends of Bert and clamp need to be matched with 50 ohms

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