J
John S
Guest
USB tester says \"Voltage measurement accuracy: ± (0.8% + 4 words)\"
What does the \"4 words\" mean?
Thanks.
What does the \"4 words\" mean?
Thanks.
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Jan Panteltje
Guest
On a sunny day (Sat, 1 Oct 2022 22:36:16 -0400) it happened John S
<Sophi.2@invalid.org> wrote in <thatf8$1aocf$1@dont-email.me>:
Goolge translate from Chinese?
<Sophi.2@invalid.org> wrote in <thatf8$1aocf$1@dont-email.me>:
USB tester says \"Voltage measurement accuracy: ± (0.8% + 4 words)\"
What does the \"4 words\" mean?
Thanks.
Goolge translate from Chinese?
P
Phil Allison
Guest
Jan Panteltje wrote:
------------------------------------
** The idiot OP will never give us enough info to know that.
........Phil
------------------------------------
On a sunny day (Sat, 1 Oct 2022 22:36:16 -0400) it happened John S
USB tester says \"Voltage measurement accuracy: ñ (0.8% + 4 words)\"
What does the \"4 words\" mean?
Thanks.
Goolge translate from Chinese?
** The idiot OP will never give us enough info to know that.
........Phil
D
Don Y
Guest
On 10/1/2022 7:36 PM, John S wrote:
Perhaps it is meant to be read as \"(0.8% + 4) words\" -- i.e., a percentage
of value plus a fixed uncertainty \"count\" of 4, expressed as words (instead
of \"bytes\").
One would need to know what the range of measurements might be to infer
a likely implementation (e.g., if the measurement is \"16 bits\" it
would suggest \"words\")
USB tester says \"Voltage measurement accuracy: ± (0.8% + 4 words)\"
What does the \"4 words\" mean?
Perhaps it is meant to be read as \"(0.8% + 4) words\" -- i.e., a percentage
of value plus a fixed uncertainty \"count\" of 4, expressed as words (instead
of \"bytes\").
One would need to know what the range of measurements might be to infer
a likely implementation (e.g., if the measurement is \"16 bits\" it
would suggest \"words\")
J
John S
Guest
On 10/2/2022 1:50 AM, Phil Allison wrote:
From one idiot to the other - here is all the available info:
<https://smile.amazon.com/MakerHawk-3-7-30V-Voltage-Multimeter-Voltmeter/dp/B07FMQZVW2/>
Jan Panteltje wrote:
------------------------------------
On a sunny day (Sat, 1 Oct 2022 22:36:16 -0400) it happened John S
USB tester says \"Voltage measurement accuracy: ñ (0.8% + 4 words)\"
What does the \"4 words\" mean?
Thanks.
Goolge translate from Chinese?
** The idiot OP will never give us enough info to know that.
.......Phil
From one idiot to the other - here is all the available info:
<https://smile.amazon.com/MakerHawk-3-7-30V-Voltage-Multimeter-Voltmeter/dp/B07FMQZVW2/>
J
John S
Guest
On 10/2/2022 2:18 AM, Don Y wrote:
<https://smile.amazon.com/MakerHawk-3-7-30V-Voltage-Multimeter-Voltmeter/dp/B07FMQZVW2/>
On 10/1/2022 7:36 PM, John S wrote:
USB tester says \"Voltage measurement accuracy: ± (0.8% + 4 words)\"
What does the \"4 words\" mean?
Perhaps it is meant to be read as \"(0.8% + 4) words\" -- i.e., a percentage
of value plus a fixed uncertainty \"count\" of 4, expressed as words (instead
of \"bytes\").
One would need to know what the range of measurements might be to infer
a likely implementation (e.g., if the measurement is \"16 bits\" it
would suggest \"words\")
<https://smile.amazon.com/MakerHawk-3-7-30V-Voltage-Multimeter-Voltmeter/dp/B07FMQZVW2/>
T
TTman
Guest
On 02/10/2022 03:36, John S wrote:
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www.avast.com
USB tester says \"Voltage measurement accuracy: ± (0.8% + 4 words)\"
What does the \"4 words\" mean?
Thanks.
Ignore it. google translate garbage. Probably meant 4 counts. Who cares ?
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This email has been checked for viruses by Avast antivirus software.
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E
ehsjr
Guest
On 10/1/2022 10:36 PM, John S wrote:
The term \"words\" is incorrect - it should be \"digits\".
See below.
Elsewhere at the website you posted it says
\"Voltage measurement accuracy: ± (0.8% + 4 digits)\"
To see the above, go to that website, scroll down
to Product guides and documents then click on
User Guide (PDF). See the technical parameters.
Ed
USB tester says \"Voltage measurement accuracy: ± (0.8% + 4 words)\"
What does the \"4 words\" mean?
Thanks.
The term \"words\" is incorrect - it should be \"digits\".
See below.
Elsewhere at the website you posted it says
\"Voltage measurement accuracy: ± (0.8% + 4 digits)\"
To see the above, go to that website, scroll down
to Product guides and documents then click on
User Guide (PDF). See the technical parameters.
Ed
J
John S
Guest
On 10/2/2022 1:55 PM, ehsjr wrote:
I missed seeing that. Thanks much for pointing it out.
Cheers.
On 10/1/2022 10:36 PM, John S wrote:
USB tester says \"Voltage measurement accuracy: ± (0.8% + 4 words)\"
What does the \"4 words\" mean?
Thanks.
The term \"words\" is incorrect - it should be \"digits\".
See below.
Elsewhere at the website you posted it says
\"Voltage measurement accuracy: ± (0.8% + 4 digits)\"
To see the above, go to that website, scroll down
to Product guides and documents then click on
User Guide (PDF). See the technical parameters.
Ed
I missed seeing that. Thanks much for pointing it out.
Cheers.
R
Ricky
Guest
On Monday, October 3, 2022 at 8:05:59 AM UTC-4, John S wrote:
Shouldn\'t this have been obvious? This is the way meters are spec\'d, a percentage plus some number of counts.
Has anyone seen a meter specified differently?
--
Rick C.
- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209
On 10/2/2022 1:55 PM, ehsjr wrote:
On 10/1/2022 10:36 PM, John S wrote:
USB tester says \"Voltage measurement accuracy: ± (0.8% + 4 words)\"
What does the \"4 words\" mean?
Thanks.
The term \"words\" is incorrect - it should be \"digits\".
See below.
Elsewhere at the website you posted it says
\"Voltage measurement accuracy: ± (0.8% + 4 digits)\"
To see the above, go to that website, scroll down
to Product guides and documents then click on
User Guide (PDF). See the technical parameters.
Ed
I missed seeing that. Thanks much for pointing it out.
Shouldn\'t this have been obvious? This is the way meters are spec\'d, a percentage plus some number of counts.
Has anyone seen a meter specified differently?
--
Rick C.
- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209
F
Fred Bloggs
Guest
On Saturday, October 1, 2022 at 10:37:10 PM UTC-4, John S wrote:
Word almost certainly means the resolution quantization which they say is 0..01V.
Forget that mundane nonsense. The real question is what is the Rui Deng precision sampling algorithm, and how does it extract 0.8% accuracy, a 7.8x improvement (hmmm- that number looks familiar), from a 4-bit A/D conversion.
I wonder if they\'re talking about this woman:
https://www.dr1117.com/
USB tester says \"Voltage measurement accuracy: ± (0.8% + 4 words)\"
What does the \"4 words\" mean?
Word almost certainly means the resolution quantization which they say is 0..01V.
Thanks.
Forget that mundane nonsense. The real question is what is the Rui Deng precision sampling algorithm, and how does it extract 0.8% accuracy, a 7.8x improvement (hmmm- that number looks familiar), from a 4-bit A/D conversion.
I wonder if they\'re talking about this woman:
https://www.dr1117.com/
J
John Larkin
Guest
On Mon, 3 Oct 2022 10:32:12 -0700 (PDT), Fred Bloggs
<bloggs.fredbloggs.fred@gmail.com> wrote:
Dither.
<bloggs.fredbloggs.fred@gmail.com> wrote:
On Saturday, October 1, 2022 at 10:37:10 PM UTC-4, John S wrote:
USB tester says \"Voltage measurement accuracy: ± (0.8% + 4 words)\"
What does the \"4 words\" mean?
Word almost certainly means the resolution quantization which they say is 0.01V.
Thanks.
Forget that mundane nonsense. The real question is what is the Rui Deng precision sampling algorithm, and how does it extract 0.8% accuracy, a 7.8x improvement (hmmm- that number looks familiar), from a 4-bit A/D conversion.
Dither.
F
Fred Bloggs
Guest
On Monday, October 3, 2022 at 7:45:47 PM UTC-4, John Larkin wrote:
A quick search of some of these SOCs ( dunno if they\'re still called that)- having 4-bit A/D with sampling rates over 2 GHz. So oversampling is definitely involved, and there\'s maybe that RIS ( random interleaved sampling ) technique used too . Whatever their particular algorithm, it falls under the rubric of \'probabilistic\' precision sampling- and it looks they\'re trying to keep analog completely out of it.
On Mon, 3 Oct 2022 10:32:12 -0700 (PDT), Fred Bloggs
bloggs.fred...@gmail.com> wrote:
On Saturday, October 1, 2022 at 10:37:10 PM UTC-4, John S wrote:
USB tester says \"Voltage measurement accuracy: Ä (0.8% + 4 words)\"
What does the \"4 words\" mean?
Word almost certainly means the resolution quantization which they say is 0.01V.
Thanks.
Forget that mundane nonsense. The real question is what is the Rui Deng precision sampling algorithm, and how does it extract 0.8% accuracy, a 7.8x improvement (hmmm- that number looks familiar), from a 4-bit A/D conversion.
Dither.
A quick search of some of these SOCs ( dunno if they\'re still called that)- having 4-bit A/D with sampling rates over 2 GHz. So oversampling is definitely involved, and there\'s maybe that RIS ( random interleaved sampling ) technique used too . Whatever their particular algorithm, it falls under the rubric of \'probabilistic\' precision sampling- and it looks they\'re trying to keep analog completely out of it.
F
Fred Bloggs
Guest
On Monday, October 3, 2022 at 7:45:47 PM UTC-4, John Larkin wrote:
In that accuracy spec of 0.8% + 4 words- I\'m pretty sure these geeks use \"+\" to mean \"or.\" So maybe it should be read the larger of 0.8% FS or 40 mV (4 x 10 mV)
On Mon, 3 Oct 2022 10:32:12 -0700 (PDT), Fred Bloggs
bloggs.fred...@gmail.com> wrote:
On Saturday, October 1, 2022 at 10:37:10 PM UTC-4, John S wrote:
USB tester says \"Voltage measurement accuracy: Ä (0.8% + 4 words)\"
What does the \"4 words\" mean?
Word almost certainly means the resolution quantization which they say is 0.01V.
Thanks.
Forget that mundane nonsense. The real question is what is the Rui Deng precision sampling algorithm, and how does it extract 0.8% accuracy, a 7.8x improvement (hmmm- that number looks familiar), from a 4-bit A/D conversion.
Dither.
In that accuracy spec of 0.8% + 4 words- I\'m pretty sure these geeks use \"+\" to mean \"or.\" So maybe it should be read the larger of 0.8% FS or 40 mV (4 x 10 mV)
R
Ricky
Guest
On Tuesday, October 4, 2022 at 10:08:16 AM UTC-4, Fred Bloggs wrote:
\"+\" does not mean \"or\". It means PLUS. The total error can amount to 0.8% of full scale PLUS 4 counts.
That is a very standard way to specify error ranges because of different error sources.
--
Rick C.
+ Get 1,000 miles of free Supercharging
+ Tesla referral code - https://ts.la/richard11209
On Monday, October 3, 2022 at 7:45:47 PM UTC-4, John Larkin wrote:
On Mon, 3 Oct 2022 10:32:12 -0700 (PDT), Fred Bloggs
bloggs.fred...@gmail.com> wrote:
On Saturday, October 1, 2022 at 10:37:10 PM UTC-4, John S wrote:
USB tester says \"Voltage measurement accuracy: Ä (0.8% + 4 words)\"
What does the \"4 words\" mean?
Word almost certainly means the resolution quantization which they say is 0.01V.
Thanks.
Forget that mundane nonsense. The real question is what is the Rui Deng precision sampling algorithm, and how does it extract 0.8% accuracy, a 7.8x improvement (hmmm- that number looks familiar), from a 4-bit A/D conversion.
Dither.
In that accuracy spec of 0.8% + 4 words- I\'m pretty sure these geeks use \"+\" to mean \"or.\" So maybe it should be read the larger of 0.8% FS or 40 mV (4 x 10 mV)
\"+\" does not mean \"or\". It means PLUS. The total error can amount to 0.8% of full scale PLUS 4 counts.
That is a very standard way to specify error ranges because of different error sources.
--
Rick C.
+ Get 1,000 miles of free Supercharging
+ Tesla referral code - https://ts.la/richard11209
L
Lasse Langwadt Christensen
Guest
tirsdag den 4. oktober 2022 kl. 15.36.16 UTC+2 skrev Fred Bloggs:
what SOCs have a 4bit 2GHz converter?
almost certainly some MCU with a 10-12bit adc at maybe a MHz
On Monday, October 3, 2022 at 7:45:47 PM UTC-4, John Larkin wrote:
On Mon, 3 Oct 2022 10:32:12 -0700 (PDT), Fred Bloggs
bloggs.fred...@gmail.com> wrote:
On Saturday, October 1, 2022 at 10:37:10 PM UTC-4, John S wrote:
USB tester says \"Voltage measurement accuracy: Ä (0.8% + 4 words)\"
What does the \"4 words\" mean?
Word almost certainly means the resolution quantization which they say is 0.01V.
Thanks.
Forget that mundane nonsense. The real question is what is the Rui Deng precision sampling algorithm, and how does it extract 0.8% accuracy, a 7.8x improvement (hmmm- that number looks familiar), from a 4-bit A/D conversion.
Dither.
A quick search of some of these SOCs ( dunno if they\'re still called that)- having 4-bit A/D with sampling rates over 2 GHz. So oversampling is definitely involved, and there\'s maybe that RIS ( random interleaved sampling ) technique used too . Whatever their particular algorithm, it falls under the rubric of \'probabilistic\' precision sampling- and it looks they\'re trying to keep analog completely out of it.
what SOCs have a 4bit 2GHz converter?
almost certainly some MCU with a 10-12bit adc at maybe a MHz