In Reply to: Re: Let's compare numbers and see why mine are different from yours posted by jneutron on September 6, 2006 at 08:18:00:
The name is Phase intermodulation Distorsion (measured in rms time_unit).
The testbench is the traditional SMPTE-IM, (combination 60 & 6,000Hz, ratio 4:1) but you measure phase modulation of the carrier instead of amplitude modulation.Very good amps measure in the 0.1nSrms range, bad up to several ...uSrms !!
The later could all but blurr the imaging according to your values.
(the reference paper is RRCordell, "Phase Intermodulation Distorsion- Intrumentation & Measurement" J-AES, Vol31,No.3, March 83, you can get it here.
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Follow Ups
- John, your concern has been know for nearly 25 years... - Jacques 09:26:58 09/06/06 (10)
- Nice - jneutron 11:06:42 09/06/06 (9)
- Answers for what I know and technical comment on PIM - Jacques 07:49:13 09/07/06 (8)
- Re: Answers for what I know and technical comment on PIM - jneutron 09:00:51 09/07/06 (7)
- PIM and other tests - Jacques 11:22:30 09/07/06 (6)
- Re: PIM and other tests - jneutron 11:35:16 09/07/06 (5)
- Your load resistor - Jacques 01:07:43 09/08/06 (4)
- Sure - jneutron 06:53:50 09/08/06 (3)
- If you have the build sequence - Jacques 07:52:02 09/08/06 (2)
- Picture 8 did not make it, the message did not state why. - jneutron 11:41:20 09/08/06 (0)
- Got pics of the whole shebang - jneutron 09:05:00 09/08/06 (0)