I'm installing ARTA to for a general purpose response tester and distortion analyzer. I picked up a behringer 202HD and have the software working through it but it seems like the inbuilt generator is acting flakey, Definitely not as I would expect it to operate.
The primary issue is that the generators don't turn on when measurements are called for. For some modes (such as SPA spectrum analyzer) I can get the chosen oscillator to turn on by toggling it off then back on. That is, if I am set to use periodic noise and I push the red measure button, the software toggles both the Start Rec and the Start Gen buttons to the alternate state. The highlighted buttons are now Stop Rec and Stop Gen, implying that the generator is on. It is not. I can however, "turn the oscillator off" and back on and then will see the expected signal.
If I am in the IMP (impulse mode) I can get a normal measurement with Sweep only. If I try periodic noise or MLS I see no signal and the measurement is just noise floor 120 dB or so down. I can turn on the generator manually by pushing the generator button on the impulse data panel but it still doesn't come on unless I go to the output volume selector and drop down and chose any volume number other than current (for example 1 dB lower or 1 dB higher) At that point the source comes on and I can see signal in the green bar graph. This still doesn't allow a measurement with MLS or periodic noise because the generator turns itself off when I push the record button.
I'm a long time user of a variety of hardware and software FFTs and don't think I am just pushing the wrong buttons.
Gremlins in the machine?
The primary issue is that the generators don't turn on when measurements are called for. For some modes (such as SPA spectrum analyzer) I can get the chosen oscillator to turn on by toggling it off then back on. That is, if I am set to use periodic noise and I push the red measure button, the software toggles both the Start Rec and the Start Gen buttons to the alternate state. The highlighted buttons are now Stop Rec and Stop Gen, implying that the generator is on. It is not. I can however, "turn the oscillator off" and back on and then will see the expected signal.
If I am in the IMP (impulse mode) I can get a normal measurement with Sweep only. If I try periodic noise or MLS I see no signal and the measurement is just noise floor 120 dB or so down. I can turn on the generator manually by pushing the generator button on the impulse data panel but it still doesn't come on unless I go to the output volume selector and drop down and chose any volume number other than current (for example 1 dB lower or 1 dB higher) At that point the source comes on and I can see signal in the green bar graph. This still doesn't allow a measurement with MLS or periodic noise because the generator turns itself off when I push the record button.
I'm a long time user of a variety of hardware and software FFTs and don't think I am just pushing the wrong buttons.
Gremlins in the machine?
Member
Joined 2003
Thanks for the reply
Not sure what the ASIO driver would be? (Where to find it?)
As to latest drivers I just did a fresh install the other day from the ARTA website. Do you need to install drivers seperately from that?
Not sure what the ASIO driver would be? (Where to find it?)
As to latest drivers I just did a fresh install the other day from the ARTA website. Do you need to install drivers seperately from that?
Member
Joined 2003
I didn't use drivers for the UMC202 but it feels like it is working. I can send signal to it, play to headphones, measure distortion (with the caveats above). It seems like ARTA is confused about when to turn on its generators.
Well, it was a driver issue. Windows had auto-installed some drivers that were giving it odd operation. Reinstalling from their web site made it work correctly.
David
David
Thanks ra7. I was busy at Bose running one of the acoustics groups for a few years but now that I'm retired I thought I'd hang out with you guys again...
Congratulations on retirement! And we get to hang out more with you! Awesome!