L-Card E20-10, Руководство пользователя

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6.4.3. Limiting through currents .................................................................................................. 47
6.4.4. External power supply input characteristic ...................................................................... 47
6.4.5. External power supply outputs characteristic ................................................................... 48
6.5. Specification and connection examples .................................................................................... 49
6.5.1. Connections to USB ........................................................................................................... 49
6.5.2. Multimodule connections .................................................................................................. 50
6.5.3. Circuits GND, GND* and AGND .................................................................................... 51
6.5.4. ADC input connecting ....................................................................................................... 52
6.5.4.1. Intrinsic input current of ADC analog input ................................................................ 52
6.5.4.2. Connecting to high-resistance output and alternate current output ............................ 52
6.5.4.3. On standard feeler oscillographic gauge connectivity ................................................ 53
6.5.4.4. On effect of through currents on signal-to-noise ratio................................................. 53
6.5.4.5. How can you find out that the through-currents degrade the signal-to-noise ratio in
your connection diagram? ............................................................................................................. 54
6.5.4.6. How to solve the problem if the through currents are detected? ................................ 54
6.5.4.7. On disconnected ADC inputs ........................................................................................ 54
6.5.1. Digital lines and synchronization lines connecting.......................................................... 54
7. Specifications ...................................................................................................................................... 56
7.1. ADC............................................................................................................................................. 56
7.1.1. E20-10, E20-10-I, E20-10-D-I: limits of the permissible relative basic error of
measuring the ac voltage .................................................................................................................... 58
7.1.2. E20-10-1, E20-10-1-I, E20-10-D-1-I: limits of the permissible relative basic error of
measuring the ac voltage .................................................................................................................... 58
7.1.3. ADc synchronization system ............................................................................................. 59
7.2. DAC............................................................................................................................................. 59
7.3. Digital lines ................................................................................................................................. 60
7.4. Power ........................................................................................................................................... 61
7.5. Physical properties ..................................................................................................................... 62
7.6. Operation conditions .................................................................................................................. 63
7.6.1. Normal conditions .............................................................................................................. 63
7.6.2. Operating conditions .......................................................................................................... 63
8. Problems solution under abnormal situations ................................................................................... 64
8.1. How to be consulted. .................................................................................................................. 65
9. Bibliography........................................................................................................................................ 66
List of tables. ............................................................................................................................................... 67
List of figures. ............................................................................................................................................. 67