YOKOGAWA AQ6370D User Manual

5-46
IM AQ6370D-01EN
Explanation
Data measurement or signal sweeping starts when triggered by an external signal.
An external trigger input terminal is located on the rear panel of the instrument. Input
signals are of TTL levels.
SMPL TRIG: Measurement starts per external trigger signals. You can set
whether the trigger activates on a rising or falling edge of the signal.
Measurement starts approximately 70 µs after the trigger activates.
SWEEP TRIG: Sweeping starts per external trigger signals. The trigger activates on
the rising/falling edge of the signal. Sweeping starts 5 ms at most after
the trigger activates.
SMPL ENABLE: A single or repeat sweep starts when the external trigger signal level is
low. The sweep is stopped when the signal level becomes high. If the
signal level becomes low again, the sweep starts from the point that it
stopped at.
Signal Logic and Delay Time (for SMPL TRIG)
EDGE
This key is used to set the external trigger signal detection edges.
RISE: The rising edge is recognized as a trigger.
FALL: The falling edge is recognized as a trigger.
DELAY ****.*µs
This key is used to set the delay time between trigger signal edge detection and data
measurement. The setting range is 0 to 1000.0 µs (fine: steps of 0.1; coarse: steps of 1).
For information about the external trigger measurement function, see section 2.2.
Measurement Sensitivity and Corresponding Pulse Width
When SMPL TRIG or SWEEP TRIG Is Selected
The measurement sensitivity is determined based on the light pulse width. Select the
appropriate sensitivity level based on the pulse width in the table below.
Sensitivity Name and Corresponding Pulse Width
Sensitivity
setting
CHOP
MODE
On-Screen Notation
Corresponding
Pulse Width
(Min.)
Normal
PEAK HOLD
Setting
EXT TIRG
Setting
NORM/HOLD
OFF
NORM/HOLD P-NORM/HLD E-NORM/HLD
PEAK: 100 µs
EXT: 50 µs
NORM/AUTO NORM/AUTO P-NORM/AUT E-NORM/AUT 300 µs
NORMAL NORMAL P-NORMAL E-NORMAL 1 ms
MID MID P-MID E-MID 3 ms
HIGH1 HIGH1 P-HIGH1 E-HIGH1 10 ms
HIGH2 HIGH2 P-HIGH2 E-HIGH2 50 ms
HIGH3 HIGH3 P-HIGH3 E-HIGH3 200 ms
MID
SWITCH
MID/SW P-MID/SW E-MID/SW 3 ms
HIGH1 HI1/SW P-HI1/SW E-HI1/SW 10 ms
HIGH2 HI2/SW P-HI2/SW E-HI2/SW 50 ms
HIGH3 HI3/SW P-HI3/SW E-HI3/SW 200 ms
5.16 External Trigger Measurement

YOKOGAWA AQ6370D Specifications

General

Brand	YOKOGAWA
Model	AQ6370D
Category	Measuring Instruments
Language	English