09-10-2015 05:55 AM
I have a pxie-6358 in a pxie-1062 with controller pxie-8360.
when i give a 1V sine wave on ao0 I do not read 1v on ai0. I have tried with the test panel and the example vi's. I am not sure why this would happen so am not clear how to start diagnosing the problem. any help is appreciated. thanks
09-10-2015 06:15 AM
First, some more information would be helpfull(my crystal-ball is currently under recalibration 😉 )
How do you apply 1V AC ?
How did you wire the DAQ ?
How did you setup the DAQ ?
AND finally: What did you actually measure?
09-10-2015 07:36 AM
How do you apply 1V AC ?
using the test panel analog ouput, 10ks/s,100hz
How did you wire the DAQ ?
with cable from ao0 to ai0
How did you setup the DAQ ?
default test panel
AND finally: What did you actually measure?
very small, like 30mV...
09-10-2015 07:53 AM
ok, checked output with other hardware and the output is correct at 1v.
so the analog input reading is false???
09-10-2015 08:09 AM
09-10-2015 10:06 AM
on pxie-1062 the pxie-8360 is connected to slot one.
the pxie-8360 is connected to pci card in the pc.
on pxie-1062 the pxie-6358 is connected in slot 4.
the pxie-6358 is connected via cableshc68-68-epm to bnc-2090A
on the bnc-2090a the AO0 connector is feed direct to AI0 via bnc cable.
in the test panel is select analog output. the channel selected is dev1/ao0, mode: voltage sinwave, transfer mech: default, rate:10000,freq: 10hz {{Verified works}}
on analog input tab the channel dev/ai0 is selected, mode:continuous, input conf: Differential (default, cant change)
rate is 10000hz samples is 1000: i get one sine period in the chart with amplitude 0.035V.
09-11-2015 04:30 AM
more interesting if i apply 5v. see attached.
09-14-2015 11:54 AM
Have you tried analyzing the analog output at the ai0 input terminal with an oscilloscope?
09-15-2015 07:15 AM
yes, the scope shows exaclty what i request on the analog output. the ai0 does not.
09-16-2015 04:25 PM
Have you tried using a different cable to connect the output to the input?