Chapter 2 Front Panel Operations  RIGOL 
DSG800 User Guide  2-33 
3)  Arm ARB 
Press Arm ARB to stop the waveform output manually and wait for the 
next trigger. 
 
Note: This menu is valid only when the operation mode after the I/Q 
baseband signal is triggered is set to "Arm Auto" or "Arm Retrig". 
 
4)  Duration Unit 
You can press Dur Unit to set the duration unit of the IQ modulation 
wavetable when "Single" trigger is selected.   
  SL: trigger by the waveform segment. 
  SA: trigger by the data point. 
 
Note: This menu is valid when the operation mode after the I/Q 
modulation baseband signal is triggered is "Single".   
 
5)  Duration 
Press Duration to set the duration of the signal in "Single" trigger. 
 
Note: This menu is only available when the operation mode after the I/Q 
modulation baseband signal is triggered is set to "Single". Besides, this 
value defines the number of points (
) within the duration and the 
instrument acquires the actual time (
) according to the current sample 
rate (
). They satisfy the following relation: 
. 
 
6)  External Delay 
Press Ext Delay to set the delay of the response to the trigger when the 
external trigger signal is received. 
 
Note: This menu is only available when the trigger mode of the baseband 
output of I/Q modulation is set to "Ext". This value defines the number of 
points (
) and the instrument acquires the actual delay time (
) 
according to the current sample rate (
). They satisfy the following 
relation: 
. 
 
7)  External Inhibit 
Press Ext Inhibit to set the time from when an external trigger signal is 
received to when the instrument receives the next trigger signal. 
 
Note: This menu is only available when the trigger mode of the baseband 
output of I/Q modulation is set to "Ext". This value defines the number of 
points (
) and the instrument acquires the actual inhibit time (
) 
according to the current sample rate (
). They satisfy the following 
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