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Curve Tracer or Audio Analyser?
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Old 13th February 2020, 09:08 PM   #51
mbrennwa is offline mbrennwa  Switzerland
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Curve Tracer or Audio Analyser?
Why the quotes?
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Old 13th February 2020, 09:24 PM   #52
benc is offline benc  United Kingdom
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Going to call the range "device parameter analysers" or DPA - as they can do more than just trace curves. We are starting off with a unit at a really great price and will be releasing more sophisticated units (with 100% trade-in) over time.
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Old 13th February 2020, 09:40 PM   #53
jackinnj is offline jackinnj  United States
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Curve Tracer or Audio Analyser?
Quote:
Originally Posted by mbrennwa View Post
I don't think this is something a curve tracer instrument should do.

This is something that can be done in a separate software tool that takes curves data (from whatever source / tracer) and fits a model to this.
If the curve tracer dumps to Excel (see my post on Microsoft's Data Streamer) you can utilize the data with Solver to derive models quite readily.
Microsoft Data Streamer Add-In -- makes life simpler
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Old 13th February 2020, 09:58 PM   #54
benc is offline benc  United Kingdom
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EPIC (the control software) will happily dump all the data into a CSV file for each run.
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Old 13th February 2020, 10:21 PM   #55
1audio is offline 1audio  United States
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Curve Tracer or Audio Analyser?
That's really interesting. I may retire my curve tracer.
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Old 14th February 2020, 09:55 AM   #56
mbrennwa is offline mbrennwa  Switzerland
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Curve Tracer or Audio Analyser?
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Originally Posted by benc View Post
I will release the full protocol and how to talk to the unit via the USB port etc.. on release of the CT. It's not super easy to talk with as it's designed for fast communication with the host PC over USB (we use EPIC to do some of the heavy lifting), but happy to assist anyone who wants to write their own interface.
Any previews on the interface docs?
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Old 14th February 2020, 10:38 AM   #57
benc is offline benc  United Kingdom
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Not yet. We are using the FTDI FT230X to act as USB<>SERIAL converter inside the DPA - we don't use it in VCP mode but in D2XX mode.


We store calibration data in the FT230X's EEPROM and this is fairly easy to extract (it's essentially plain text). A big packet (64bytes) of raw and averaged ADC (24bit) values are sent up at 'timebase' intervals (e.g. 50ms) along with other data and a checksum. Control of the unit is through a documented register structure. So this isn't SCPI (MEASure:VOLTageC?) - we use the PC to do all the floating point stuff and much of the sequencing. The DSP inside the unit does the fast sequencing and most of the protection functions.
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Old 14th February 2020, 02:19 PM   #58
mbrennwa is offline mbrennwa  Switzerland
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Curve Tracer or Audio Analyser?
Quote:
Originally Posted by benc View Post
Control of the unit is through a documented register structure.
Can you share this documentation?
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Old 14th February 2020, 02:22 PM   #59
benc is offline benc  United Kingdom
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Quote:
Originally Posted by mbrennwa View Post
Can you share this documentation?
We will do this when we release the product.
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Old 16th February 2020, 09:05 PM   #60
mladshi is offline mladshi
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Hi Benc, Can you add functions to your ASA101 like here Videos | analog

Or make messurment like YouTube

Thanks!
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