Programming Guide

Digital Oscilloscopes Series
143
trdl: The time value which is center of the screen.
timebase: The timebase value.
grid: The grid numbers in horizontal direction.
The following picture as an example:
Send command ―TRDL?‖,return‖ TRDL -5.000000ns‖.
Get the current time value center of the screen: trdl = -5.00E-09s.
Send command ―TDIV?‖,return‖ TDIV 5.00E-09S‖.
Get the current timebase: timebase = 5.00E-09S.
The time value of the first data point: time value = -5.00E-09 – (5.00E-
09*14/2) = -40.00E-09(s)=-40(ns).
Send command ―SARA?‖,return‖ SARA 1.00GSa/s‖.
Get the current sampling rate: sampling rate= 1.00GSa/s.
The time interval: time inter = 1/ sampling rate = 1ns
So the time value of the second data point: value = -40ns+1ns = -39ns
RELATED COMMANDS
WAVEFORM_SETUP