The attachment shows the output (channel 1 overlaid by channel 2) of the Rigol RG1022 function generator. Channel 1 is set to 1k sine and 1Vrms. Channel 2 settings are copied from channel 1. The output from the generator goes into a Focusrite Scarlett 2i2 and displayed in ARTA software. I'm physically moving the output connection from CH1 to CH2, and using the same input on the 2I2.
So what is the noise/distortion on CH2 between 100hz and 5khz? Hopefully it's something simple I'm overlooking.
So what is the noise/distortion on CH2 between 100hz and 5khz? Hopefully it's something simple I'm overlooking.
No, I'm not sure. If the output of the function generator is exactly the same for both channels, I can't imagine why CH 2 would overload the input of the sound card and Ch 1 wouldn't. I'll check the outputs with a multimeter to make sure sure I'm getting the same voltage out of both channels.
Yes, now I'm sure. The outputs of the Rigol DG1022 are exactly the same in frequency and amplitude. Besides there's a light around the gain knob that turns red when you overload the input.
Attached are separate pics of the two output channel. You can see that the THD is different on each channel.
Hi,
from Rigol´s Website: "These instruments each have 2 channels with the 2nd channel having a lower voltage output".
This indicates, that the two channels are not equal ... one of the reasons for me to choose the Siglent SDG2042X generator instead of an Rigol or any other.
jauu
Calvin
from Rigol´s Website: "These instruments each have 2 channels with the 2nd channel having a lower voltage output".
This indicates, that the two channels are not equal ... one of the reasons for me to choose the Siglent SDG2042X generator instead of an Rigol or any other.
jauu
Calvin
You’re right! I found tonight that if I keep the output under 800mVrms on CH2 the weird distortion goes away!
Thanks for all the help!
Thanks for all the help!
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