Hi, I am using ADS8364EVM and I would like to know why the value of signal amplitude is very high when the input signal from the mains or function generator? also I sow in some books that the amplitude of the signal is very high (2.3e+4,why? if I used off line data and the plotting of the signal in CCS is ok like input values. Thanks. Medris
why amplitude is very high in CCS
Started by ●July 28, 2006
Reply by ●July 28, 20062006-07-28
Medris wrote:> Hi, > I am using ADS8364EVM and I would like to know why the value of signal > amplitude is very high when the input signal from the mains or function > generator? also I sow in some books that the amplitude of the signal is > very high (2.3e+4,why? > > if I used off line data and the plotting of the signal in CCS is ok like > input values.What are the units? 2.3e+4 microvolts is not "very high". If you connected the mains, I would expect smoke. Jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
Reply by ●July 28, 20062006-07-28
>Medris wrote: >> Hi, >> I am using ADS8364EVM and I would like to know why the value of signal >> amplitude is very high when the input signal from the mains orfunction>> generator? also I sow in some books that the amplitude of the signalis>> very high (2.3e+4,why? >> >> if I used off line data and the plotting of the signal in CCS is oklike>> input values. > >What are the units? 2.3e+4 microvolts is not "very high". If you >connected the mains, I would expect smoke. > >Jerry >-- >Engineering is the art of making what you want from things you can get. >����������������������������������������������������������������������� >thank you Mr. Jerry there is no any smoke in my board and if there is I will inform you!!!!!!!!!!!!!!
Reply by ●July 28, 20062006-07-28
Medris wrote:>> Medris wrote: >>> Hi, >>> I am using ADS8364EVM and I would like to know why the value of signal >>> amplitude is very high when the input signal from the mains or > function >>> generator? also I sow in some books that the amplitude of the signal > is >>> very high (2.3e+4,why? >>> >>> if I used off line data and the plotting of the signal in CCS is ok > like >>> input values. >> What are the units? 2.3e+4 microvolts is not "very high". If you >> connected the mains, I would expect smoke. >> >> Jerry >> -- >> Engineering is the art of making what you want from things you can get. >> ����������������������������������������������������������������������� >> > thank you Mr. Jerry there is no any smoke in my board and if there is I > will inform you!!!!!!!!!!!!!!Good. I'm glad to hear it. I ask again: what units do your numbers represent? The readings may not be large at all. How are the numbers obtained? For integers out of a 16-bit bipolar ADC, 2.3e+4 is about 70% of full scale. Jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
Reply by ●July 30, 20062006-07-30
>Medris wrote: >>> Medris wrote: >>>> Hi, >>>> I am using ADS8364EVM and I would like to know why the value ofsignal>>>> amplitude is very high when the input signal from the mains or >> function >>>> generator? also I sow in some books that the amplitude of the signal >> is >>>> very high (2.3e+4,why? >>>> >>>> if I used off line data and the plotting of the signal in CCS is ok >> like >>>> input values. >>> What are the units? 2.3e+4 microvolts is not "very high". If you >>> connected the mains, I would expect smoke. >>> >>> Jerry >>> -- >>> Engineering is the art of making what you want from things you canget.>>>�����������������������������������������������������������������������>>> >> thank you Mr. Jerry there is no any smoke in my board and if there isI>> will inform you!!!!!!!!!!!!!! > >Good. I'm glad to hear it. > >I ask again: what units do your numbers represent? The readings may not >be large at all. How are the numbers obtained? For integers out of a >16-bit bipolar ADC, 2.3e+4 is about 70% of full scale. > >Jerry >-- >Engineering is the art of making what you want from things you can get. >����������������������������������������������������������������������� >Actually the values got from CCS graph and from graph property dialog I can change only the time display unit(s,ms,..) and also I used autoscale. In fact I don't know what is the unit of these values (2.3e+4)whereas the input from the mains and after attenuated between 0 an 5volt. Thanks
Reply by ●July 31, 20062006-07-31
Medris wrote: ...> Actually the values got from CCS graph and from graph property dialog I > can change only the time display unit(s,ms,..) and also I used autoscale. > In fact I don't know what is the unit of these values (2.3e+4)whereas the > input from the mains and after attenuated between 0 an 5volt.I presume that's +/-5V. How many bits to your converter? As I mentioned, full scale for 16 bits is +/-32,767 counts, or +/-3.2767e4. Jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
Reply by ●August 1, 20062006-08-01
>Medris wrote: > > ... > >> Actually the values got from CCS graph and from graph property dialogI>> can change only the time display unit(s,ms,..) and also I usedautoscale.>> In fact I don't know what is the unit of these values (2.3e+4)whereasthe>> input from the mains and after attenuated between 0 an 5volt. > >I presume that's +/-5V. How many bits to your converter? As I mentioned,>full scale for 16 bits is +/-32,767 counts, or +/-3.2767e4. > >Jerry >-- >Engineering is the art of making what you want from things you can get. >����������������������������������������������������������������������� >Thanks a lot Mr. Jerry and I apologize if my talking with you was notgood. Medris/malaysia
