VI only reading one input channel

[imperial-aero]

Hi,

I’m trying to read 8 signals from 8 different microphones. I’ve got a PCI 6229 device which is connected to the BNC terminal BNC-2090A.

However, when I run my VI, it only reads the input from AI1 (the second input channel). I know that there’s nothing wrong with my microphones, because they did input values from that particular channel.

I’m wondering whether there’s something wrong with my VI or with the hardware.

Thank you for any help in advance.

Ruf

[JB]

Post your VI or a screenshot and we will probably be able to help you !

[imperial-aero]

Thanks for the quick reply JB.

Here's my VI, let me know if you need more clarification on it, as parts of it might be a bit unclear. The top part of the block diagram, starting from the Input Channels is where I start reading the inputs.

Many thanks,

Ruf.

[JB]

Type Dev1/ai0:7 into the Input Channels control and see what happens. Mode details here.

[imperial-aero]

That's what I typed into the Input Channels. The odd thing is that, on the waveform graph it only produces ai1, the others are at zero amplitude.

I created a simulated device and ran the program with the same inputs and then it gave me values for the other inputs. Maybe there's something wrong with the hardware? (all the equipment are new though)

[imperial-aero]

Hi,

I disconnected everything and connected them all up again. Now, they all produce the simlar graph (attached). It does look a bit odd because I imagined them to have some sort of wave pattern.

[JB]

Have you already tried to zoom the signals ?

Click on the graph >> Visible Items >> Graph Palette >> magnifying glass

You might have a surprise !