Keysight 81160A - Page 157

Features and Functions
81150A and 81160A User’s Guide 157
Lower Threshold Voltage
Introduction
The lower threshold voltage defines the voltage level at which a sample is
considered being a logical ‘0’. If the voltage at MOD-IN is less or equal to
the lower threshold voltage, then the external provided bit is considered
being ‘0’. This is true for 2-level and 3-level signals. In case of 2 level
signals, a voltage level above the lower threshold is considered being a
logical ‘1’.
0 1 1 0 0 0 01 1 1
Lower Threshold
Input Signal
Derived Logical Levels
Sampling Points
1 / Frequency
High Level
Low Level
Leading Edge (on Pulse Screen)
NRZ
Output
Signal
User defined Bitshape
Output Signal
(Example only)
Front Panel
Operation
 On the pattern mode screen press the Ext. Input Setup softkey.
 Press the Number of Levels softkey.
 Enter the number of levels using the numerical keypad, or turn the rotary
knob to select the desired number of levels.
Remote Interface
Operation
:DIGital[1|2]:SOURce:EXTernal:THReshold
{<volts>|MINimum|MAXimum}