# No readings detected with oscilloscope

**URL:** <https://forum.liquidinstruments.com/t/no-readings-detected-with-oscilloscope/582>\
**Category:** Support & Troubleshooting\
**Created:** [October 6, 2022, 3:57am UTC](https://forum.liquidinstruments.com/t/no-readings-detected-with-oscilloscope/582 "2022-10-06T03:57:32Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![km93](https://avatars.discourse-cdn.com/v4/letter/k/e47c2d/32.png) [@km93](https://forum.liquidinstruments.com/u/km93)\
**Post date:** [October 6, 2022, 3:57am UTC](https://forum.liquidinstruments.com/t/no-readings-detected-with-oscilloscope/582/1 "2022-10-06T03:57:32Z")

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Hi,  
I have a Moku:Go and am running the Windows 11 with the latest firmware & software (569? & 2.4.2 build 16204). I am not sure what has happened but I am no longer getting any readings from the oscilloscope instrument.  
Using a voltmeter I can confirm the circuit I am measuring has a voltage of approximately 1.8v however the oscilloscope only shows a solid zero volts. I’ve tried with measuring using both channels and with different probes however it doesn’t seem to make a difference. I’ve also reset the Moku:Go (using the reset button) and uninstalled / re-installed the software.

Is there anything else I can try to resolve or troubleshoot this?

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**Author:** ![PaulC](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.liquidinstruments.com/paulc/32/23_2.png) [@PaulC](https://forum.liquidinstruments.com/u/PaulC)\
**Post date:** [October 6, 2022, 4:58am UTC](https://forum.liquidinstruments.com/t/no-readings-detected-with-oscilloscope/582/2 "2022-10-06T04:58:56Z")

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Hi KM,

sorry to hear you are having difficulties with your Moku:Go. You have certainly done some good trouble shooting, a couple of additional ideas to check

- since this is a DC 1.8v signal, please make sure the oscilloscope is set to DC coupling, not AC coupling
- can you confirm if both input channels on the Moku:Go behave in the same way?
- finally, perhaps check by connecting Moku:Go output 1 to Moku:Go input 1, then setting the oscilloscope function generator to 1 KHz 1Vpp signal; does the oscilloscope show this test signal ? Double click to auto-scale.

For the oscilloscope function generator see page 17 of the Moku:Go oscilloscope manual :

> **[UserManual-MokuGo-OscilloscopeVoltmeter.pdf](https://download.liquidinstruments.com/documentation/manual/instrument/mokugo/UserManual-MokuGo-OscilloscopeVoltmeter.pdf)**
>
> 1797.00 KB

Regards,

Paul.

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**Author:** ![km93](https://avatars.discourse-cdn.com/v4/letter/k/e47c2d/32.png) [@km93](https://forum.liquidinstruments.com/u/km93)\
**Post date:** [October 6, 2022, 6:14am UTC](https://forum.liquidinstruments.com/t/no-readings-detected-with-oscilloscope/582/3 "2022-10-06T06:14:56Z")

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thanks for the quick reply Paul.

A few notes;

- i’ve definitely set the coupling to DC
- both channels are behaving this way.
- I did what you suggested, set output 1 to output a 1khz 1Vpp sine signal and then connected it to input one but i did not see any measurements.
- If i set channel A to output 1 then i could see the sine wave signal

For interest sake I also tried setting the output waveform to DC and 1V and wasn’t able to observe it on my voltmeter. I was able to observe output from the power supplies on the rear of the Moku:Go though.

Can you confirm what the relationship is between channel A & B and input 1 and 2? I had assumed that input 1 is channel A and input 2 is channel B

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**Author:** ![Sam.Speece](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.liquidinstruments.com/sam.speece/32/191_2.png) [@Sam.Speece](https://forum.liquidinstruments.com/u/Sam.Speece)\
**Post date:** [October 6, 2022, 8:37pm UTC](https://forum.liquidinstruments.com/t/no-readings-detected-with-oscilloscope/582/4 "2022-10-06T20:37:05Z")

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The relationship between the channels is as you described typically. It is possible to choose the channel source for both Channel A and Channel B as I’m sure you’ve seen, but by default Channel A = Input 1 and Channel B = Input 2.

![image](https://canada1.discourse-cdn.com/flex035/uploads/liquidinstruments/original/1X/ab017f0e11a035224b8092b5e12fbae6f8cd15ed.png)

Since you’ve gone through all of the common issues we find with users reporting this issue, and did a factory reset, I think it would be best for us to schedule a quick troubleshooting call so someone from the apps team can go through a few things live and determine if we need to send a replacement. Would you mind filling out this [support form](https://www.liquidinstruments.com/support/contact/) so we can get you in our ticket system and get this fixed for you asap?