Sony SS-HQ1 Application Notes page 134

MWB (Manual white balance)
When adjusting the R gain, the B gain is also adjusted following the black body radiation curve.
SFTUP and SFTDWN in Table 10.7-3 are respectively set to port drivers to perform adjustments through key
operations.
The up-key (SFTUP) shifts toward the high color temperature side and the down-key (SFTDWN) shifts toward
the low color temperature side. The adjustable color temperature range is low color temperature
(approximately 2500K) to high color temperature (approximately 9500K) saved at the time of pre-white balance
adjustment.
Fig 10.7-2 Trace Curve for Manual White Balance (image)
In MWB mode, the parameters controlled through key operations (SFTUP/SFTDWN) are WBR and WBB in
Table 10.7-4. When the key is released (or set to "0[h]") after making adjustments using the SFTUP or
SFTDWN key, the gain at that time is saved to a parameter in Table 10.7-5 and saved to EEPROM. To start up
using the gain value written to EEPROM, perform a reset start while in MWB mode.
If both SFTUP and SFTDWN are set to 1[h], the preset values which are set in advance (MWBPRESETR and
MWBPRESETB in Table 10.7-6) will be applied to WBR or WBB.
Parameter
SFTUP(CAT17_Byte18_bit0)
SFTDWN(CAT17_Byte18_bit1)
R-Y
Vector Scope
Table 10.7-3 MWB Related Parameters
Description
UP key
DOWN key
128
- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
Black Body Curve
B-Y
Settings range
1[h]:R gain UP
(B gain linked)
1[h]:R gain DOWN
(B gain linked)