I want to do some 12dB SINAD measurements using a recently purchased HP 8920A. My question is very basic but I am finding conflicting information in the documentation. I believe I understand how the measurement works but I am uncertain how to correctly connect to make the measurement using the service monitor. My understanding is that the SINAD measurement looks at the AF audio out of the receiver basically at the speaker output (or dummy 8ohm load for output that bypasses the speaker).
My question is how to connect the receiver speaker/AF out to the 8920? The 8920 Applications Handbook shows that for the SINAD measurement the receiver speaker/audio connects to the 8920 audio out. I don't get that (why the 8920 audio out port) . Elsewhere it indicates that AF/AC measurements use the 8920 audio in connector. That makes more sense to me. I would think that the receiver speaker/audio should go to the 8920 audio in, not the audio out connector. But the 8920 Applications Handbook clearly show the receiver speaker connected to the 8920 audio out BNC.
So for people that have done SINAD using a 892x, what is the correct 8920 audio port to use?
Thanks
My question is how to connect the receiver speaker/AF out to the 8920? The 8920 Applications Handbook shows that for the SINAD measurement the receiver speaker/audio connects to the 8920 audio out. I don't get that (why the 8920 audio out port) . Elsewhere it indicates that AF/AC measurements use the 8920 audio in connector. That makes more sense to me. I would think that the receiver speaker/audio should go to the 8920 audio in, not the audio out connector. But the 8920 Applications Handbook clearly show the receiver speaker connected to the 8920 audio out BNC.
So for people that have done SINAD using a 892x, what is the correct 8920 audio port to use?
Thanks