6-4
IM DLM4038-03EN
6.2 Triggering Section
Item
Specifications
Triggered modes
Auto, Auto Level, Normal, Single, N Single, Single
The DLM4000 measures in Single mode when you start acquisition by pressing the SINGLE key
or when you start acquisition by pressing the RUN/STOP key when the record length setting only
allows for single acquisition.
Trigger sources
CH1 to CH8:
Signals received through input terminals
LINE:
The connected commercial power supply signal (only Edge trigger can be used)
EXT:
The signal received through the TRIG IN terminal
LOGIC:
Signals received through the logic signal input port terminals
Source bits: L0 to L7, A0 to A7
1
, B0 to B7
1
Trigger coupling
CH1 to CH8:
DC/AC
EXT:
DC
HF rejection
Trigger source bandwidth limit can be specified separately for CH1 to CH8.
OFF:
No bandwidth limit
15 kHz:
DC to approximately 15 kHz
20 MHz:
DC to approximately 20 MHz
Noise rejection
Noise rejection can be turned on or off (trigger level hysteresis can be selected) for CH1 to CH8
separately. Noise rejection cannot be specified on channels set to TV trigger.
OFF:
Approximately 0.3 div of hysteresis
ON:
Approximately 1.0 div of hysteresis
Selectable trigger level
range
CH1 to CH8:
±4 div from the screen center
EXT:
±2 V
Trigger level resolution
CH1 to CH8:
0.01 div (0.1 div for TV triggers)
EXT:
5 mV
Trigger level accuracy
CH1 to CH8:
2
±(0.2 div + 10% of the trigger level)
EXT:
3
±(50 mV + 10% of the trigger level)
Window comparator setting Window comparator can be turned on or off for CH1 to CH8 separately.
OFF:
Normal comparator
Edge polarities: Rise and Fall. Qualifications: H, L, and X.
ON:
Window comparator
Edge polarities: Enter and Exit. Qualifications: IN, OUT, and X.
Selectable window trigger
level range
Can be set separately for CH1 to CH8.
Center:
±4 div from the screen center
Width:
±4 div around the center
Window trigger level
accuracy
The following trigger level accuracy applies to the upper and lower limits of the window that are
specified using the Center and Width settings. The upper and lower limits are set separately for
CH1 to CH8.
±(0.2 div + 10% of the trigger level)
However, the accuracy does not apply to an upper or lower limit that falls outside ±4 div from the
screen center.
External trigger probe
attenuation setting
1:1, 10:1
Trigger sensitivity
CH1 to CH8:
1 div
P-P
DC to the maximum bandwidth (with noise rejection set to off)
EXT:
100 mV
P-P
DC to 100 MHz
Trigger position
Can be set as a percentage of the display record length in 0.1% steps
Selectable trigger delay
range
–(Time length of the post-trigger section) to +10 s
Selectable hold-off time
range
20 ns to 10 s
1 A0 to A7 and B0 to B7 are available on models with the /L16 option.
2 Values emasured under standard operating conditions (see section 6.11 for details) after a 30-minute warm-up and calibration.
3 Values measured under standard operating conditions (see section 6.11 for details) after a 30-minute warm-up.
