Oscilloscope & AWG connection problem

[dalpets]

As a total beginner I have been trying to get the same results shown in the below Youtube video.

 My equipment is Siglent oscilloscope SDS 1102CML (100MHz, 1 GSa/s) & Siglent AWG SDG 1020 (20Mhz, 125 MSa/s).

The video is entitled “An introduction, oscilloscopes and function generators by Controls and Instrumentation Lab” @


Using the connections shown in the video @ 9:15-11.40 & 11.43-15.30 I get NO waveform response from the oscilloscope corresponding to numerous attempts to configure the connected AWG.

It seems that that the oscilloscope does not see the AWG at all.

What might I be doing wrong here?

Thanks

[tooki]

There are two major starting points here: Is the scope working? And is the AWG outputting anything? It’ll be harder to diagnose the second if the first isn’t proven.

For the first question: Can you see a signal using your scope’s probe compensation lug?
If so: is the AWG’s output actually turned on? Is it a frequency your scope can see? How are you triggering the scope? Etc.

[dalpets]

I get a square waveform with the compensation  lug.

The generator setting are as follows;
channel 1
square waveform
frequency 257hz
amplitude 7.00Vpp
phase 0.0 degrees
offset -8.0mVdc
duty 50.0%

The oscilloscope;
channel 1
probe 10x
trigger edge
mode auto
ch1 5.00mA
M 5.0ms
CH1 edge 3.00mA
DC coupling
Volts/Div Fine
f=400KHz
Mpos:600.0ys

The remaining issues that I have are;
oscilloscope only displays a jagged sine waveform whereas the generator is set to square wave.
generator displays one frequency value but oscilloscope displays a completely different value.
generator frequency changes are not reflected in oscilloscope waveforms. frequency changes can only be made with oscilloscope dial.

Thanks for any further help.

[donlisms]

Do you see A/C voltage on your DMM at the output of the AWG?

Have you tried the Auto button in the scope?
---
I'm a little unsure what you mean when you write "5.0mA" and "3.0mA" for the scope settings. Oscilloscopes don't generally have much interest in current.  I wondered if you meant "mV", in which case measuring 7 volts with that setting is going to be a little disappointing.

I would suggest this: AWG 0.5volts or less, with a simple sine wave.  No fancy settings; just defaults.  Hit "Auto" on the scope, no fancy triggering, and you should be able to get a view of the signal.

Then start changing one parameter at a time to migrate toward your end goal.  In other words, maybe you've got too many variables spinning, and it only takes x one bad one to mess you up. 

[radiolistener]

Check that you connected oscilloscope ground clip to AWG ground terminal and oscilloscope probe to AWG signal output terminal. If you reverse it, the AWG output will be shortened with ground from oscilloscope through mains.

[tautech]

I get a square waveform with the compensation  lug.

The generator setting are as follows;
channel 1
square waveform
frequency 257hz
amplitude 7.00Vpp
phase 0.0 degrees
offset -8.0mVdc
duty 50.0%

The oscilloscope;
channel 1
probe 10x
trigger edge
mode auto
ch1 5.00mA
M 5.0ms
CH1 edge 3.00mA
DC coupling
Volts/Div Fine
f=400KHz
Mpos:600.0ys

The remaining issues that I have are;
oscilloscope only displays a jagged sine waveform whereas the generator is set to square wave.
generator displays one frequency value but oscilloscope displays a completely different value.
generator frequency changes are not reflected in oscilloscope waveforms. frequency changes can only be made with oscilloscope dial.

Thanks for any further help.

Change channel input setting from A to V.

[Aldo22]

When I wonder why I can't see anything, I usually forgot to turn on the channel on the AWG. This is particularly often the case with the second channel.
I know that sounds stupid, but some mistakes are just stupid.

[dalpets]

Do you see A/C voltage on your DMM at the output of the AWG?

Have you tried the Auto button in the scope?
---

You nailed it on the head. the auto button fixed the problem. Thanks.

I have another problem that I can't find a solution to. In the attachment here at the bottom left of the Oscilloscope display it shows Ch1 as 1.00V. This is not from my machine but captured from an online website review for the Siglent 1102CML that I am using.

I want Ch1 to read 5.00v but my machine refuses to show anything other than an Ma(?) reading. I should instead have 1, 2 or 5v options.
I have used both the measure button & vertical sensitivity button (V & mV) for Ch1 but I cannot get it to read in volts. I also don't understand what the ma notation relates to.   
Any ideas? Thanks.
P.S. I have since checked the Siglent firmware updates but the versions numbers don't make sense & their release notes are generic, not for each release, so I can't reliably tell if my problem was ever a bug.

My firmware is 5.01.02.29 but Siglent don't even list any version 5 firmware & they say their first update was 6.01.01.18 (their latest 6.01.01.25 2/8/23)?

[dalpets]

When I wonder why I can't see anything, I usually forgot to turn on the channel on the AWG. This is particularly often the case with the second channel.
I know that sounds stupid, but some mistakes are just stupid.

Yep that's what I did, too. definitely a stupid mistake!

[Aldo22]

I want Ch1 to read 5.00v but my machine refuses to show anything other than a Ma(?) reading. I have used both the measure button & vertical sensitivity button (V &mV) for Ch1 but I cannot get it to read in volts. I also don't understand what the 950ma relates to.   
Any ideas? Thanks.

RTFM?

To Specify Amplitude Unit
Select the amplitude display unit for the current channel. The available units are V and A.
When the unit is changed, the unit displayed in the channel label will change accordingly.
1. Press CH1button on the front panel to enter the CH1 function menu.
2. Press the Next Page softkey to enter the second page of the CH1 function menu.
3. Press the Unit softkey to select the desired unit V or A. 
The default setup is V

[dalpets]

I want Ch1 to read 5.00v but my machine refuses to show anything other than a Ma(?) reading. I have used both the measure button & vertical sensitivity button (V &mV) for Ch1 but I cannot get it to read in volts. I also don't understand what the 950ma relates to.   
Any ideas? Thanks.

RTFM?

To Specify Amplitude Unit
Select the amplitude display unit for the current channel. The available units are V and A.
When the unit is changed, the unit displayed in the channel label will change accordingly.
1. Press CH1button on the front panel to enter the CH1 function menu.
2. Press the Next Page softkey to enter the second page of the CH1 function menu.
3. Press the Unit softkey to select the desired unit V or A. 
The default setup is V

Done
Thank You.

[tautech]

This is not from my machine but captured from an online website review for the Siglent 1102CML that I am using.


P.S. I have since checked the Siglent firmware updates but the versions numbers don't make sense & their release notes are generic, not for each release, so I can't reliably tell if my problem was ever a bug.

My firmware is 5.01.02.29 but Siglent don't even list any version 5 firmware & they say their first update was 6.01.01.18 (their latest 6.01.01.25 2/8/23)?

Please confirm the model you have.
SDS1102CML or CML+ ?
They use different firmware.
Version： V6.01.01.25 is not compatable with old CML HW.
Last version I have for the earlier CML is V100R005B01D02P32

[dalpets]

This is not from my machine but captured from an online website review for the Siglent 1102CML that I am using.


P.S. I have since checked the Siglent firmware updates but the versions numbers don't make sense & their release notes are generic, not for each release, so I can't reliably tell if my problem was ever a bug.

My firmware is 5.01.02.29 but Siglent don't even list any version 5 firmware & they say their first update was 6.01.01.18 (their latest 6.01.01.25 2/8/23)?

Please confirm the model you have.
SDS1102CML or CML+ ?
They use different firmware.
Version： V6.01.01.25 is not compatable with old CML HW.
Last version I have for the earlier CML is V100R005B01D02P32

Mine is your first mentioned vanilla version-ie., just CML.
Do you agree that they no longer support my version & that it is no longer on their website?
If so that's most unhelpful- why keep one & not the other?

[tautech]

This is not from my machine but captured from an online website review for the Siglent 1102CML that I am using.


P.S. I have since checked the Siglent firmware updates but the versions numbers don't make sense & their release notes are generic, not for each release, so I can't reliably tell if my problem was ever a bug.

My firmware is 5.01.02.29 but Siglent don't even list any version 5 firmware & they say their first update was 6.01.01.18 (their latest 6.01.01.25 2/8/23)?

Please confirm the model you have.
SDS1102CML or CML+ ?
They use different firmware.
Version： V6.01.01.25 is not compatable with old CML HW.
Last version I have for the earlier CML is V100R005B01D02P32

Mine is your first mentioned vanilla version-ie., just CML.
Do you agree that they no longer support my version & that it is no longer on their website?
If so that's most unhelpful- why keep one & not the other?

Early CML were superseded by the CML+ version in mid 2016 offering a higher res display and LAN support....nearly 8 years ago.
IIRC price remained the same and the earlier HW was discontinued.

As I mentioned we do have the old FW for the early CML models so if you need any we can supply via email. PM me.