Audio Precision System One vs Portable One vs ATS-1 vs ATS-2?

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cheater

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Joined 2004
#1
Hi all,
I was wondering if someone had insight into the differences between the following AP devices:

  • System One (without DSP)
  • Portable One
  • ATS-1
  • ATS-2

I am looking to measure primarily audio filters and preamps, as well as (now and then) power amps, ADCs, and DACs.

Is it possible to use a System One without DSP board to acquire signals and then later measure them with FFT using separate software?

Do Portable One, ATS-1 and ATS-2 have FFT options built in without a special DSP expander board?

Does System One have any sort of live oscilloscope view?

How long does acquisition take on a System One to get a distortion measurement vs the other devices? Similarly, how long does Bode plot acquisition take with them? Or more importantly - are there noticeable differences in time?

Thanks a lot
 
#2
In general, any thoughts on the differences between those devices are very welcome. How they are in use, what their comparative capabilities are as well as precision, any maintenance hurdles and unobtainum components known to be at the end of the road, etc. Thanks everyone.
 
#3
Hi cheater

  • System One (without DSP) is an Analog only model 22A
  • Portable One is a manual operated and may have GPIB computer controlled options.
  1. ATS-1 is like a Portable One in a metal box
  2. ATS-2 is like a System One 222
Capturing a signal on the S1 and later doing an FFT in not an option.

All 4 of the instruments do have options

No, the S1 (ApWin software) have a live oscilloscope view. It is part of the APX family.

Join LinkedIn, Classic AP Audio Systems Group LA, this is an older AP user group with lots of good data.

Duke
 
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#4
@Audio1Man thank you!

What are the chances of taking a System One 22A and upgrading it to DSP? Are the boards in general available?

If you don't mind getting into it - what is the difficulty of acquiring raw signal from a System One?

Thanks for the pointer on the group. I'd have to set up a LinkedIn, but I'll do it as soon as I have some time. Had no idea it's being used as a social network of some sort.

Is System One 22A a good buy in your opinion, or are they obviated by other testing equipment, or possibly a recent good quality audio interface with a PC based test suite?

Appreciated
 
#5
cheater said:
What are the chances of taking a System One 22A and upgrading it to DSP? Are the boards in general available?
Click to expand...
No, you need to buy a 222(A) or 322(A)
cheater said:
If you don't mind getting into it - what is the difficulty of acquiring raw signal from a System One?
Click to expand...
Take the Channel Monitor output (1volt & 500kHz BW) and connect to a DSO
cheater said:
Thanks for the pointer on the group. I'd have to set up a LinkedIn, but I'll do it as soon as I have some time. Had no idea it's being used as a social network of some sort.
Click to expand...
Join, We limit it to only REAL USERS, no social media
cheater said:
Is System One 22A a good buy in your opinion, or are they obviated by other testing equipment, or possibly a recent good quality audio interface with a PC based test suite?
Click to expand...
It is a very good tool, however this model is ANALOG ONLY.
Duke
 
#9
Sorry, fighting with phone auto-incorrect.
That the AP S1 increases the effective dynamic range of a DSO by analog pre-processing with a notch or or other filtering. Or a soundcard plus software eg. REW. to display harmonic content.
 
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