Konica Minolta CA-410 Instruction Manual page 105

Out of Measurement Range
Refer to P. 134 for information on error messages.
The measurement display section will show "−−−−−" in the following cases.
Details
The brightness of the measurement
object exceeds the upper limit.
Calculating the correlated color
temperature or dominant wavelength
of the measurement target is not
possible with colorimetry.
The measurable range of the
instrument is 999.9% for FMA flicker
measurement, and it is exceeded.
The vertical synchronization signal
frequency is beyond the range that
can be input to the instrument in FMA
flicker measurement.
A probe that is not capable of
performing flicker measurement is
being used for flicker measurement.
Aliasing Noise
During JEITA flicker measurement, when measuring a light source that includes a harmonic component such as a
rectangular wave light source, aliasing noise may occur in the low-frequency range, which can be displayed as the JEITA
flicker value. Peaks that vary greatly on the Power Spectrum graph when changing the JEITA frequency resolution setting by
one step likely are being influenced by aliasing noise.
Set the sampling frequency for JEITA flicker measurement as follows (typical examples).
JEITA frequency resolution
0.1 Hz
0.5 Hz
1 Hz
Lower the brightness of the measurement target.
Retry the measurement. If the situation does not improve, change the color mode
to any mode other than Lv Tcp duv or Lv λd Pe.
Adjust the measurement target and retry the measurement after the flicker amount
has decreased.
Retry the measurement while taking into account the following.
When measuring with EXT as the measurement frequency mode:
(1) Make sure the BNC cable being used is properly connected, and input the
vertical synchronization signal.
(2) Check the frequency of the vertical synchronization signal being input. With
FMA flicker measurement, the range of vertical synchronization signal
frequency that can be input is between 0.50 and 130.00 Hz.
(3) If inputting the appropriate vertical synchronization signal is difficult, change
the measurement frequency mode to a mode other than EXT.
When measuring with INT as the measurement frequency mode:
(1) Check the set synchronization frequency. With FMA flicker measurement, the
range of vertical synchronization signal frequency that can be input is between
0.50 and 130.00 Hz.
(2) If setting an appropriate synchronization frequency is difficult, change the
measurement frequency mode to a mode other than INT.
Note that Ø27 High Sensitivity Probe (CA-VP427) and Ø10 High Sensitivity Probe
(CA-VP410) are not capable of flicker measurement. To perform flicker
measurement, please use a different probe.
Sampling frequency
103
Countermeasure
204.8 Hz
256 Hz
256 Hz