4-40
IM AQ6376-01EN
Setting the Gate Signal Logic
7.
Press the GATE LOGIC soft key. Each time you press the key, the setting toggles
between POSI and NEGA.
Explanation
PLS LIGHT MEASURE
You can enter pulse light measurement settings and external trigger mode settings.
PEAK HOLD
You can set the peak hold value for the pulse light. Pulse light measurement can be
carried out based on this. The setting range is 1 to 9999 ms.
EXT TRIGGER MODE
This mode is used to measure pulse light using an external trigger signal. When this key
is selected, sweeping is performed in external trigger mode, wherein sampling is done
based on an external trigger signal.
For information on external trigger measurement, see section 4.15.
GATE MODE
In GATE MODE, the AQ6376 samples data when the external signal (gate signal) is
active and measures the pulse light. To use this mode, you need to set the sampling
interval and signal logic. For details, see “Gate Sampling Measurement,” described later.
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
Invalid
NORM/HOLD P-NORM/HLD
E-NORM/HLD
PEAK: 100µs
EXT: 50µs
NORM/AUTO
NORM/AUTO P-NORM/AUT
E-NORM/AUT
300µs
NORMAL
NORMAL
P-NORMAL
E-NORMAL
1ms
MID
MID
P-MID
E-MID
3ms
HIGH1/CHOP
Valid
HI1/CHOP
P-HI1/CHOP
E-HI1/CHOP
50ms
HIGH2/CHOP
HI2/CHOP
P-HI2/CHOP
E-HI2/CHOP
200ms
HIGH3/CHOP
HI3/CHOP
P-HI3/CHOP
E-HI3/CHOP
2000ms
4.15 Pulse Light Measurement