Necessary Conditions For Correct Connection And Correct Settings Of The Input Of The Adc L-502; The Physical Causes Of Possible Problems - L-Card L-502-P-G-D-I User Manual

45 4.5: Necessary conditions for correct connection and correct settings of the input of the
Отдалённы е одноф азны е И Н и диф ф . реж им L-502
Remote single-phase VS and diff. L-502 mode
Z2
GND1 GND2
U
Yj
Examples of connecting the ADC input are collected in the item
4.5. Necessary conditions for correct connection and
correct settings of the input of the ADC L-502.
Simplified examples of connection of the ADC input are given in section
... If you do not take into account the electrical properties of the signal sources, wires
(cables) when using L-502 ADC connections, use the default L-502 program settings, then,
!
most likely, you will get a poor result. Why? What do you need to consider? – If you
answer below these questions, links to the Internet resources of the site
used.

4.5.1. The physical causes of possible problems

Physical cause #1. The wide bandwidth of the ADC transmission in L-502 (of the order
of 10 MHz) can be not only a great advantage of the L-502 ADC (in the ability of the ADC to
qualitatively digitize the high-speed dynamic processes), but it can be a big problem if:
•
the signal source has an unlimitedly wide frequency band (much wider than the width
of the frequencies of the useful signal)
•
unscreened connection is applied (or the signal source itself has a significant area of
the unscreened surface), in a situation where electromagnetic fields in the frequency
X j
L-502
Y j
X i
Y i
Z1
GND
U
Yi
Дифференциальный ИН
Differential VS
и диф ф еренциальны й. реж им L-502
and differential mode L-502
Дифф. ИН
Diff. VS
Отдалённая группа одноф азны х И Н
Remote single-phase VS group
и реж им с "общ ей зем лёй" L-502
and "with common ground" mode L-502
GND1
U
Xi
X i L-502
U
Yi Y i
Z
GND
U
GND
ADC L-502.
X (Y )
j
j
X (Y ) L-502
i i
GND32
Z
GND
U
Yi
6.1 59
on page .
6.1
, however,
en.lcard.ru will be