Hello,
I have an Audio Precision Portable One Plus that seems to have developed a strange issue. At certain frequencies and levels, the distortion measurement reads 0.0000%. I know that the residual THD of the device is about .0015% from doing loopback measurements. It also passes its own self-test.
Can anyone enlighten me as to what this issue is, and how I can go about solving it?
I have an Audio Precision Portable One Plus that seems to have developed a strange issue. At certain frequencies and levels, the distortion measurement reads 0.0000%. I know that the residual THD of the device is about .0015% from doing loopback measurements. It also passes its own self-test.
Can anyone enlighten me as to what this issue is, and how I can go about solving it?
A fault in the measurement amplifier section ?
The Dual Domain version in the analogue section residual THD has a spec of = 0.0025 % across 15Hz to 20kHz (80kHz bandwidth ) .
The Portable One /Plus etc was discontinued in 2010 (PIPA ) --P1 version discontinued in 1997 -- support status =unsupported
system two =unsupported 2016 .
As far as I know D.Self has /had an expensive Audio Precision Analyzer .
It seems its still available on upmarket "second user " company websites.
The Dual Domain version in the analogue section residual THD has a spec of = 0.0025 % across 15Hz to 20kHz (80kHz bandwidth ) .
The Portable One /Plus etc was discontinued in 2010 (PIPA ) --P1 version discontinued in 1997 -- support status =unsupported
system two =unsupported 2016 .
As far as I know D.Self has /had an expensive Audio Precision Analyzer .
It seems its still available on upmarket "second user " company websites.
D Self's analyzer is a SYS1 if I remember correctly. They go for about 1k.
I think this discussion is about a 2722; they go for anything between 5k and 10k depending on options.
Jan
I think this discussion is about a 2722; they go for anything between 5k and 10k depending on options.
Jan
The OP,s version is a cheaper portable version it isn't a 2722 with a dis.of 0.0025 % - 15Hz-20kHz -80kHz bandwidth ,the 2722 has a lower distortion , my old 8903 (HP)-Agilent has slightly better dis. than Portable One although I built the JLH 0.001 % dis. analyzer .