PXI 6361 Analog Offset Voltage

[qvu]

The device have voice analog voice HI and voice analog voice Low that need to connect to PXI 6361. When measuring A0 the offset is up 11 V, what could possibly happened? Also, when ran NI MAX only the positive wave sine appear. Does Voice HI wire to A0 and Voice Low wire to A0 Gnd? 

[santo_13]

Please provide more details about the device (link to manual or user guide) and how exactly you connected to 6361. How are you measuring the offset? did you write any code? If so, please share it as well.

By "A0", do you mean "AI0"?

[qvu]

Hellooo! 

Please see the attached pics. On the 6361, I'm using pin 21,22, 54, and 55 for analog inputs. I have two devices setup to send sine wave back and forward using 6361. The first device connect to pin 21 for Voice HI and pin 55 for Voice Low and the second device connect to pin 22 for Voice HI and pin 55 for Voice Low. Device one is fine but the device two when I measure the pin22 the voltage is up to ~11V. When I ran NI MAX for the configuration it looks like the sine wave clip off. 

Second question: If the device is connect to the outlet ground and there is a connection to the PXI 6361 does that make it grounded or floating ground?

Thank you for your help!! 

[qvu]

Just a follow up I'm trying to send Analog output from 6361 to a device audio input. 

[santo_13]

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@qvu wrote:

Hellooo! 

Please see the attached pics. On the 6361, I'm using pin 21,22, 54, and 55 for analog inputs. I have two devices setup to send sine wave back and forward using 6361. The first device connect to pin 21 for Voice HI and pin 55 for Voice Low and the second device connect to pin 22 for Voice HI and pin 55 for Voice Low. Device one is fine but the device two when I measure the pin22 the voltage is up to ~11V. When I ran NI MAX for the configuration it looks like the sine wave clip off. 

Second question: If the device is connect to the outlet ground and there is a connection to the PXI 6361 does that make it grounded or floating ground?

Thank you for your help!! 

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So, you are generating some signal using AO but you've not provided any meaningful information about the device that receives the signal.

You did not explain how you measured the 11V signal, did you try generating 0V on NI MAX, measure between AO and AOGND, using a multimeter with just the SCB68A and the other device disconnected?

FYI - 6361 generates single ended bipolar signal and it is common grounded.

[qvu]

Good afternoon, 

I'm generating some signal using AO into a radio which take in the signal into audio mic high... but somewhere in the circuit that I connect .. when using NI MAX to test for the sine wave Max peak +10 to -10 volt somehow its clipped to +2 to -2. Do you by chance know if this would be some ground issue or signal wires incorrectly?? 

[santo_13]

Again, you're not providing sufficient information to help you. 

For audio signals, it is quite common for some audio circuits to clamp it to the working range.