SP-5000M-USB / SP-5000C-USB
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8. Other functions
8.1 Black level control
This function adjusts the setup level.
The adjusting level is 0 to +100LSB at 10-bit output.
8.1.1 Black Level Selector
The following factors can be set.
SP-5000M-USB: DigitalAll
SP-5000C-USB: DigitalAll/DigitalRed/ DigitalBlue
8.1.2 Black Level
The black level can be set in the following range.
SP-5000M-USB: DigitalAll
:
-256
~
+255
SP-5000C-USB: DigitalAll
:
-256
~
+255
DigitalRed/DigitalBlue
:
-512
~
+511
8.2 Gain control
In the SP-5000-USB, the gain control uses Analog Base Gain and Digital Gain.
Analog Base Gain can be set at 0dB, +6dB or +12dB for both SP-5000M-USB and SP-5000C-USB.
The
digital gain is used for the master gain setting.
For setting the gain,
1. Set analog base gain (Select from 0dB, +6dB and +12dB)
2. Set digital gain
The master gain (DigitalAll) for both monochrome and color can be set x1 (0dB) to x16
(+24dB) against the analog base gain. The resolution for gain setting is x0.01/step which is
0.05dB to 0.08dB, depending on the setting value.
3. In the SP-5000C-USB, blue and red digital gain can be set from x0.45 to x
5.62 against the
Master gain setting and its resolution is x0.01/step.
4. In the SP-5000C-USB, analog base gain can be applied to R, G and B channel respectively in
order to cover wider range of color temperature.
Note1: If the gain up function is used, it is recommended to use the analog base gain as
the master gain setting. For instance, if +12dB gain up is required, the analog
base gain is set at +12dB and no digital gain is added. This is because the signal-
to-noise performance is better with analog gain. However, the AGC function
works only with digital gain.
Additionally, the analog base gain is effective in order to minimize missing counts
in the histogram at higher gain settings. Please note that the analog base gain has
less accuracy due to its variability.
Note2: If the analog base gain is set at 0dB and Digital Gain is used at a high gain setting,
the video level may be unstable and fluctuate approx. 5%. In this case, it is
suggested to set the analog base gain at +6dB or +12dB.
The master gain control uses Digital Gain. All digital gain can be set by x0.01/step. If the digital
gain is set too high, breaks (missing counts) in the histogram may occur.