Recent content by andro

Well then you can probably say that it was due to the 1k working resistance. Since it is common practice in circuit development to separate the masses, I have done this. Of course it doesn't necessarily make sense in this application, at least not with 1k. I've only got a Class AB PA amp and I...

Okay, I have connected both grounds, but the automatic circuit breaker in the amplifier doesn't seem to like that. I get clicking noises every second from the amplifier with simultaneous spikes in the REW input graph. The input resistance on my circuit is 4.5kOhm, i.e. the inputs are not...

So should I remove the 1k working resistor and bring the masses without resistance to the same potential? This will probably cause problems with the potential difference between the amplifier and the sound card.

Thank you for your fast answer. I have not short-circuited the inputs themselves, only the outputs from the load connection. Short circuit cal: This is my current setup. If I have misunderstood the measurement, a correction would be very helpful or if the circuit does not work like this...

Hi, Ive got the same problem with my setup. My soundcard is the Behringer UCA202 and I use a circuit for impedance measurement only. No switches or frequency response related components to simplify my setup. I tried to switch around every single hardware input and output as well as probably...