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2-6
IM AQ6373-01EN
Analog Out <<See section 5.18 for the operating procedure>>
An analog voltage is output from the ANALOG OUT terminal on the rear panel of the
main unit according to the input light.
The temporal changes in the input light can be measured by an oscilloscope.
However, to enable this output, the sensitivity setting must be NORM/HOLD.
When set to NORM/HOLD, the RANGE is switched relative to the REF LEVEL without
implementing the AUTORANGE function. Therefore, if the level of the input light is high,
the output voltage level is saturated.
The saturation level and noise level varies depending on the REF level.
The table below shows the relationship between the REF level and the saturation level.
REF LEVEL(dBm or dBm/nm)
Saturation Level * (dBm)
REF > 0
23 dBm or more
0 < = REF > -10
13 dBm or more
-10 < = REF > -20
3 dBm or more
-20 < = REF > -30
-7 dBm or more
-30 < = REF
-17 dBm or more
* At wavelength 700 to 900 nm
ANALOG OUT Output Specifications
Output saturation voltage
+6 V or more
Offset voltage (including noise)
±5 mVp-p
Bandwidth
10 kHz or more
Load
1 k
Ω
or more
Correcting the Wavelength Resolution
<<See section 5.7 for the operating procedure>>
Since the wavelength resolution function is set according to the monochromator slit width,
the setting resolution and actual resolution may not match. For this instrument, if the
resolution is set to 0.1 nm, the actual resolution will be 0.1 nm for a 450 nm wavelength,
and 0.07 nm for a 850 nm wavelength.
If the Resolution Correction function is turned ON, measured data is processed by the
software so that it matches the set resolution.
The Resolution Correction function is available when the resolution is set between 0.1nm
and 10.0 nm. The Resolution Correction function is only available when the horizontal
axis is in wavelength mode. It cannot be used in Frequency mode.
2.2 Measurement