Archive of the former Yahoo!Groups mailing list: MOTM
Subject: AP Plots & Specs
From: mbedtom@...
Date: 2002-05-22
With the addition of the new AP geek toy, will MOTM modules now get published specifications for:
∗ signal-to-noise ratio (with specified weighting)
∗ THD+N at various frequencies for all applicable modules
∗ carrier suppression for ring modulators
∗ worst-case error voltages for modules that muck with control voltages (like 820)
∗ other applicable or useful specifications
I think MOTM modules kick ass but I'd like to know quantitatively, how much ass they kick. Comparing performance to other module manufacturers is interesting I suppose, but less so to me. (Hey, I've already decided on MOTM. If brand "X" differs in specs by a few dB, I don't care... I'm sticking with MOTM.) I'm more interested in knowing what to expect performance-wise so I can determine if a given module has a "problem" or is operating as designed. For example, my lone 110 has a "knee" in the amplitude control. When the control voltage drops below a certain point, the output signal drops abruptly (by about 20 dB) to the residual noise level . The control range is therefore limited to approximately 50 decibels. Since I don't know what it is supposed to do in the first place (no specs), I don't know if my 110 is "sick" or is operating as designed. I don't want to call Synth Tech every time I notice some aspect of a module that I think is "funny" as that wastes Paul's time and takes him away from doing more interesting things.
I'm usually "way out there" on such things. Anybody else care to weigh-in on the spec issue? (If nobody else cares, then I must ask why did Paul drop a ton of cash on such a spiffy piece of test equipment.)
Cheers!
Tom Farrand