Full Scale, Impedance And Coupling - Keysight M31 A Series User Manual

1 Theory of Operation: M31/M33XX Digitizers

1. 1. 1. 1 Full Scale, Impedance and Coupling

Depending on the product specifications the user can configure the input full scale value, the input
impedance (Table 1) and the input coupling (Table 2). The full scale parameter adjusts automatically
the input gain to maximize the input dynamic range.
Product-dependent Settings: This Section describes all the possible input settings, but in reality
they are product-dependent. Please check the corresponding product datasheet to see if they are
applicable.
Input Impedance
Option
High Impedance Input impedance is high (value is product
50Ω
Table 1: Options for the input impedance setting (parameter impedance in function
channelInputConfig (page
Input Coupling
Option
DC
AC
Table 2: Options for the input coupling setting (parameter coupling in function
(page 45).
Programming Information
Function Name
channelInputConfigIt
Table 3: Programming functions related to the input full scale, impedance and coupling settings
4
Description
dependent, check the corresponding datasheet)
Input impedance is 50Ω
45).
Description
DC coupling
AC coupling
Comments
configures the input full scale, impedance and coup-
ling settings
Programming Definitions
Name
AIN_IMPEDANCE_HZ 0
AIN_IMPEDANCE_50 1
Programming Definitions
Name
AIN_COUPLING_DC
AIN_COUPLING_AC
Details
Section 2.3.4.1 on page
28
Keysight M31XXA/M33XXA Digitizer User's Guide
Value
Value
0
1
channelInputConfig