YOKOGAWA AQ6370D User Manual

5-41
IM AQ6370D-01EN
Measurement
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App
Index
Measurement Sensitivity and Corresponding Pulse Width
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
Time average spectrum measurement
Pulse light can be measured as a time average spectrum. The average level of the
measured pulse light is displayed as the level of the spectrum. For example, if the pulse
light were a perfect rectangular wave, the measured level would be:
(pulse light peak level [mW]) × (pulse light duty).
Thus, when the pulse light duty is small, the measured level is low. Set the measurement
sensitivity and optimal averaging times for pulse light measurement. The measurable
repeat frequency of pulse light differs depending on the measurement sensitivity. Note
that an even lower repeat frequency can be measured if AVERAGE TIMES is increased.
If AVERAGE TIMES is set to n, the measurable repeat frequency is approximately 1/n for
the frequencies in the table below.
Sensitivity setting and measurable repeat frequency (when AVERAGE
TIMES is 1)
Sensitivity setting CHOP MODE Repeat frequency
NORM/HOLD
OFF
200 kHz or higher
NORM/AUTO 100 kHz or higher
NORMAL 33 kHz or higher
MID 10 kHz or higher
HIGH1 133 kHz or higher
HIGH2 660 Hz or higher
HIGH3 160 Hz or higher
MID
SWITCH
10 kHz or higher
HIGH1 3.3 kHz or higher
HIGH2 660 Hz or higher
HIGH3 160 Hz or higher
Values not guaranteed. When measuring, use these as values as guidelines.
5.15 Pulse Light Measurement

YOKOGAWA AQ6370D Specifications

General

Brand	YOKOGAWA
Model	AQ6370D
Category	Measuring Instruments
Language	English