Chapter 2 Command System  RIGOL 
DG800 Programming Guide  2-79 
Parameter 
10 ns to (0.625×pulse width) 
 
Remarks   
  The rise time is defined as the time required for the pulse amplitude to rise from 10% to 90%; the fall 
time is defined as the time required for the pulse amplitude to fall from 90% to 10%. 
  When [:SOURce[<n>]] or [<n>] is omitted, the system sets the related parameters of CH1 by default. 
  The ranges of the rise time and fall time are limited by the current waveform frequency and pulse 
width. When the specified value exceeds the limits, the instrument will adjust the edge time 
automatically to make it match the specified pulse width. 
 
Example 
:SOUR1:FUNC:PULS:TRAN 0.000000035    /*Sets the pulse rise time and fall time of CH1 to 35 ns.*/ 
 
 
[:SOURce[<n>]]:FUNCtion:PULSe:TRANsition:LEADing 
 
Syntax 
[:SOURce[<n>]]:FUNCtion:PULSe:TRANsition:LEADing {<seconds>|MINimum|MAXimum} 
[:SOURce[<n>]]:FUNCtion:PULSe:TRANsition:LEADing? [MINimum|MAXimum] 
 
Description 
Sets the pulse rise time of the specified channel. 
Queries the pulse rise time of the specified channel. 
 
Parameter 
10 ns to (0.625×pulse width) 
 
Remarks 
  The rise time is defined as the time required for the pulse amplitude to rise from 10% to 90%. 
  When [:SOURce[<n>]] or [<n>] is omitted, the system sets the related parameters of CH1 by default. 
  The range of the rise time is limited by the current waveform frequency and pulse width. When the 
specified value exceeds the limits, DG800 will adjust the edge time automatically to make it match the 
specified pulse width. 
 
Return Format 
The query returns the pulse rise time in scientific notation, with 7 effective digits. For example, 
3.500000E-08 (the pulse rise time is 35 ns). 
 
Example 
:SOUR1:FUNC:PULS:TRAN:LEAD 0.000000035  /*Sets the pulse rise time of CH1 to 35 ns.*/ 
:SOUR1:FUNC:PULS:TRAN:LEAD?             /*Queries the pulse rise time of CH1 and the query returns 
3.500000E-08.*/ 
 
 
[:SOURce[<n>]]:FUNCtion:PULSe:TRANsition:TRAiling 
 
Syntax 
[:SOURce[<n>]]:FUNCtion:PULSe:TRANsition:TRAiling {<seconds>|MINimum|MAXimum} 
[:SOURce[<n>]]:FUNCtion:PULSe:TRANsition:TRAiling? [MINimum|MAXimum] 
 
Description 
Sets the pulse fall time of the specified channel.