ADC104OperationalManualV3_2
Crystal Vision
Page
4
19/09/05
Using chroma levels
The ADC104F supports ‘normal’ EBU/SMPTE N10 levels, which have been selected as
the analogue equivalent of SDI levels, and ‘Betacam’ levels, which may be met with early
recordings and/or equipment.
The N10 levels are based on 100% bars as its maximum signal, whilst Betacam levels
were based on 75% bars.
The following table describes expected input levels for 100% bars for the available
settings:
Input
SMPTE/EBU N10
‘Betacam’
RGB
625: 3x700mV video, 300mV sync
Not applicable
Y U V
625/525: 700mV Lum, 2x350mV UV,
300mV sync
625/525: 700mV Lum, 2x350mV UV,
300mV sync
Y U V +
setup 525
714.3mV (max) 53.55mV (min) Luma, 2
x 350mV UV, 285.7mV sync
714.3mV (max) 53.55mV (min) Lum, 2
x 467mV UV, 285.7mV sync.
Note:
The Betacam chroma levels control has no effect on RGB inputs.
The facility to apply setup compensation in 525 is provided to cater for situations where
NTSC has been decoded with from a source that has had +7.5% setup applied to the
luminance.
Rear connector options
The ADC104 is a single height module and will fit into all Crystal Vision rack frames.
Three rear connectors are available, the RM01 providing two outputs, the RM02
providing three outputs plus a sync loop-through output and the RM18 which provides
four outputs and a sync loop-through output.
For frame packing density with the available rear connectors, refer to the Specification
chapter.