Analog Discovery 3 Scope Channel #1 is not working

[jaejoo14]

Scope Channel #1 is not working in Analog Discovery3.  The same configuration as Channel #2, it has a very weak signal.  Calibrated the AWG #1 and running the calibration of scope brings the exception because of weak signal.

Any way to resolve it?

 

Edited November 7, 2023 by jaejoo14

[attila]

Hi @jaejoo14

1. Make sure the attenuation is set to 1 X
2. The input range relay may be stuck or remain in bad position due to certain software settings.
Try toggling Channel 1 Range between 500 mV/div and 1V/div
Does it solve the problem ? Can you hear it clicking like it is for Channel 2 ?
3. If you have calibrated the device (WaveForms/Settings/Device Manager/Calibrate), make sure the Scope 1 Gains are low values, or select Reset/Load Factory.

[jaejoo14]

 

after reset and factory load. did AWG1 calibrated. While calibration of Scope Channel #1.,

Channel Reference Average Minimum Maximum

CH1 0 V 0.25203 V 0.18282 V 0.32756 V

Range: 62.404 V Offset: 0 V

CH2 0 V 0.18155 V 0.11427 V 0.25138 V

Range: 62.404 V Offset: 0 V

Channel Reference Average Minimum Maximum

CH1 0 V -0.60933 V -0.68159 V -0.53305 V

Range: 62.404 V Offset: 19.997 V

CH2 0 V -0.69062 V -0.76158 V -0.60542 V

Range: 62.404 V Offset: 19.997 V

Channel Reference Average Minimum Maximum

CH1 0 V 1.1324 V 1.0549 V 1.211 V

Range: 62.404 V Offset: -19.99663 V

CH2 0 V 1.0743 V 1.0053 V 1.1539 V

Range: 62.404 V Offset: -19.99663 V

Channel Reference Average Minimum Maximum

CH1 0 V 0.02201 V 3.3237 mV 0.04221 V

Range: 5.4455 V Offset: 0 V

CH2 0 V 0.01592 V 6.9797 mV 0.02526 V

Range: 5.4455 V Offset: 0 V

Channel Reference Average Minimum Maximum

CH1 0 V -0.06411 V -0.0845 V -0.04329 V

Range: 5.4455 V Offset: 1.9998 V

CH2 0 V -0.07145 V -0.08085 V -0.06124 V

Range: 5.4455 V Offset: 1.9998 V

Channel Reference Average Minimum Maximum

CH1 0 V 0.11067 V 0.08949 V 0.13669 V

Range: 5.4455 V Offset: -1.99977 V

CH2 0 V 0.10533 V 0.09481 V 0.11641 V

Range: 5.4455 V Offset: -1.99977 V

Channel Reference Average Minimum Maximum

CH1 5 V 0.75628 V 0.66655 V 0.83414 V

Range: 62.404 V Offset: 0 V

CH2 5 V 5.9706 V 5.9037 V 6.037 V

Range: 62.404 V Offset: 0 V

Channel Reference Average Minimum Maximum

CH1 -5 V -0.30918 V -0.3885 V -0.22472 V

Range: 62.404 V Offset: 0 V

CH2 -5 V -5.60836 V -5.6828 V -5.53425 V

Range: 62.404 V Offset: 0 V

Channel Reference Average Minimum Maximum

CH1 2 V 0.23338 V 0.22534 V 0.2413 V

Range: 5.4455 V Offset: 0 V

 

[attila]

Hi @jaejoo14

2 hours ago, attila said:

2. The input range relay may be stuck or remain in bad position due to certain software settings.
Try toggling Channel 1 Range between 500 mV/div and 1V/div
Does it solve the problem ? Can you hear it clicking like it is for Channel 2 ?

For warranty and replacement contact the support.digilent @ ni.com specifying the Date of Purchase, Seller and Purchase Order/ Web order Number. 

[jaejoo14]

Yes, I can hear the clicking sounds for Channel #1 and #2.

Still issue.

Do you think I need to contact the support for a warranty?

 

[attila]

Hi @jaejoo14

Contact the support for replacement.
The relay on oscilloscope channel 1 is stuck on high range, so the reading is probably correct only with 1V/div and higher.
Toggling the relay a few times, like changing between 500mV/div and 1V/div, should have removed temporary stuck, contact issue, oxidation.

You could try the following to make sure all application settings are reset, but don't expect to help.
/Applications/WaveForms.app/Contents/MacOS/WaveForms -safe-mode

(For nicer app interface you could use Settings/ Options/ Style : Fusion)