IM 701510-01E
16-2
16.2 Trigger Section
Item
Specifications
Trigger source
CH1, CH2, CH3 and CH4 (signal which is input to each input terminal, CH1/CH2 for DL1520/
DL1520L), LINE (commercial power source signal), EXT (signal input to the TRIG IN terminal)
Trigger type
Edge trigger
: Activates a trigger on the edge of a single trigger source.
Window Trigger
: Activates a trigger when the source level of channel 1either enters a
previously set range of voltages or protrudes from a previously set
range of voltages.
TV Trigger
: Activates a trigger for the video signal in NTSC, PAL or HDTV
(studio standard high-vision signal, available on DL1540/DL1540L)
broadcasting systems. Only CH1 is available for this function.
Designation of field No. and line No. is possible.
OR Trigger (optional)
: Activates a trigger when one of the trigger source conditions becomes
true. The edge trigger condition can be selected for each trigger
source.
Pattern trigger (optional)
: Activates a trigger when all the multiple trigger source conditions
become true. Trigger condition can be selected from High or Low
for each trigger source. Clock signal can also be selected.
Width trigger (optional)
: Activates a trigger when the pulse width is greater or smaller than
the specified width.
Setting range below pulse width: 5 ns, 10 ns to 9.999 s
Setting range above pulse width: 30 ns to 9.999 s
*OR, PATTERN and WIDTH are provided as optional with DL1520L/DL1540/DL1540L.
Trigger mode
Auto
: Acquires waveform automatically if no trigger is activated for more
than approx. 100 ms.
Auto-level
: Automatically sets the trigger level to the median of the amplitude if
no trigger is activated for more than approx. 100 ms.
Normal
: Acquires waveform only when a trigger is activated.
Single
: Acquires waveform only once when a trigger is activated.
Single (N)
: Acquires waveform when a trigger is activated the specified number
of times. Available on DL1520L/DL1540/DL1540L.
Trigger slope
Rise, fall and rise/fall
Trigger coupling
DC or AC for trigger source.
HF rejection
Bandwidth limit (approx. DC to 15 kHz) for the trigger source can be turned ON/OFF.
Trigger level
Setting range
:
±
10 div from the center of the waveform display frame
Setting resolution
: 1/50 div
Accuracy*
1
:
±
(1 div + 10% of trigger level)
Trigger sensitivity
1 divp-p
(when frequency of trigger source is DC to 150 MHz)
Trigger position
0,
±
2 div,
±
4 div from the center of waveform display frame
(Settable from –5 div to +5 div in steps of 1/50 div in the case of DL1520, DL1520L, DL1540 with
software (ROM) version 1.20 or later, or DL1540L with software (ROM) version 1.20 or later)
Trigger delay setting range
0 to 9.999 s (normal delay)
Inter channel trigger skew*
2
5 ns or less
(when vertical sensitivity is the same)
*1 Measured with the internal clock selected as the timebase and the voltage axis sensitivity set to “CAL”, after calibration following a 30-
minute warm-up, under the standard operating conditions stipulated on page 16-8.
*2 Measured with a voltage axis sensitivity of 50 mV/div when a pulse of amplitude of 5 div v-p and rise time of 1 ns is input.
Trigger coupling: DC, HF rejection : OFF
