User manual

RIGOL Chapter 2 Command System
2-88 MSO1000Z/DS1000Z Programming Guide
:LA:TCALibrate
Syntax :LA:TCALibrate <tcal>
:LA:TCALibrate?
Description
Set or query the delay calibration time of the digital channels. The default unit is s.
Parameter
Name Type Range Default
<tcal> Real -100ns to 100ns 0.00s
Explanation  When using the oscilloscope for actual measurement, the transmission delay of the
probe cable may cause relatively larger error (zero offset). Zero offset is defined as
the offset of the crossing point of the waveform and threshold level line relative to
the trigger position. Users can set a delay time to calibrate the zero offset of the
corresponding channel.
 You can only set <tcal> to a specified value at certain step. If the parameter sent is
not one of the specified values, the specified value nearest to the value sent will be
used. The step of this parameter differs in different horizontal timebase (set by
the
:TIMebase[:MAIN]:SCALe command), as shown in the table below.
Horizontal Timebase
Delay Calibration Time Step
5ns
100ps
10ns
200ps
20ns 400ps
50ns
1ns
100ns
2ns
200ns
4ns
500ns
10ns
1μs to 10μs
20ns
Note: When the horizontal timebase is equal to or greater than 10μs, the delay
calibration time cannot be adjusted.
Return
Format
The query returns the delay calibration time in scientifc notation.
Example
:LA:TCALibrate 0.00000002 /*Set the delay calibration time to 20ns*/
:LA:TCALibrate? /*The query returns 2.000000e-08*/