Crystal Vision: Q-Down Mini minibox down converter brochure

Crystal Vision: Q-Down Mini minibox down converter brochure
Minibox short-delay
broadcast down converter
Q-Down Mini is a standalone down converter designed to meet
the demanding requirements of broadcasters. Q-Down Mini
combines the three winning advantages of outstanding picture
quality, short processing delay and competitive pricing to create the
perfect minibox for attaching directly to the back of SD monitors in
space-challenged environments with no spare rack space.
Q-Down Mini provides a unique level of image quality in its price range – avoiding
aliasing while retaining picture sharpness. The sophisticated two dimensional filtering
gives broadcast results without the complication of looking at multiple fields or
movement detection – resulting in reliable, artefact-free conversion. Should you want
to optimise the performance for your material, you can also choose from four
alternative vertical filter characteristics.
Q-Down Mini features flexible outputs, with a reclocked loop-through of the HD or
SD input, a dedicated SDI output and three Standard Definition outputs individually
link selectable between analogue (composite, Y/C, YUV and RGB) and digital. It can
down convert 720p and 1080i High Definition at both 50Hz and 59.94Hz, with the
down converter bypassed if the input is Standard Definition.
Q-Down Mini’s short processing delay of just 16 lines eliminates the need to
compensate audio or other signals for the video delay, keeping everything in sync and
making your system design much simpler. There are also three fixed video delay
settings available: ‘minimum’ (16 or 52 SD lines processing delay, depending on the
conversion), ‘fixed’ (52 SD lines) and ‘frame’. The ‘fixed’ 52 lines delay allows the
aspect ratio to be changed live on air without any picture disturbance, while the
‘frame’ of delay can be used to match a variety of equipment or alternatively to
connect with equipment that has no delay.
Other useful features include the ability to deal with any HD to SD aspect ratio
conversion requirements, with the option of selecting a 16:9 Anamorphic output for
16:9 SD systems and either a 16:9 to 4:3 Letterbox or 16:9 to 4:3 Full Screen with
centre cut for 4:3 SD systems. The aspect ratio can be controlled remotely by using the
GPI connections, and setting DIP switches 1 and 2 to follow GPI.
Q-Down Mini’s compact 165mm x 80mm x 28mm size means it fits easily on the
back of a monitor – with the flexibility to be orientated in any direction to fulfil the
requirements of your application. The base includes two M3 threaded inserts which
make it easy to mount it to a suitable back plate.
Q-Down Mini is ideal for providing down converted feeds for SD monitors – or for
any other down conversion application. All settings are configured by ten mini DIP
switches on the outside of the box, with the Standard Definition outputs selected by
using a combination of these switches and internal moveable links. Two LEDs indicate
the presence of power and an active HD or SD serial input. Q-Down Mini features six
BNCs for the video signals and a 9-way D-Type plug for the power connections and
access to the GPIs, with a separate external universal AC power supply available.
Q-Down Mini – for when you want to keep the maximum quality of your HD signals
and get exceptional value for your money.
Short-delay broadcast down converter in
a minibox
Ideal for attaching directly to the back of
a monitor and providing down converted
feeds
Accepts HD or SD input
Allows flexible configuration of the three
Standard Definition video outputs, with
mixtures of SDI, composite, Y/C, YUV and
RGB
Short processing delay of just 16 lines means
no need to compensate audio signals
Unique level of image quality at this price
level
Sophisticated two dimensional filtering –
avoids aliasing while retaining picture
sharpness
Optimise your performance: select from four
different filter characteristics
Includes aspect ratio converter, with
Anamorphic, Letterbox and centre cut
conversions
Three fixed delay settings to match other
equipment
Configure settings with mini DIP switches on
the box or GPIs
Separate external universal AC power supply
available
HD or SD reclocked loop-through
HD or
SD
input
Equalise
and reclock
HD or SD
SDI
SDI / Comp / Y / G
Quick down converter
and ARC
and filter select
and fixed delay
SDI / Comp / U / B
Q-Down Mini
HD or SD loop
SDI
SDI / Composite /
Y/G
SDI / Composite /
U/B
SDI / Composite /
V/R/C
SDI / Comp /
V/R/C
DAC
Comp
Y/C
YUV
or RGB
Links and
switches
control
GPIs
Use switches 1 and 2 to set the aspect ratio conversion
Use switches 3 and 4 to select the analogue output format
Use switches 5 and 6 to set the video delay
Use switch 7 to add or remove a +7.5IE pedestal for NTSC-M or NTSC-J
Use switch 8 to select Betacam levels when the output format
is set to YUV
Use switches 9 and 10 to select the filter characteristic
Q-Down Mini – ideal for attaching to the back of a monitor
All configurations are made by switch selection
Q-Down Mini PSU
SPECIFICATION
MECHANICAL
Crystal Vision minibox 165mm x 80mm x 28mm
Weight: 480g
Power consumption: 6.5 Watts
Power input 7-14V DC. Separate external universal AC power
supply available
Connectors: Six BNCs for the video signals and a 9-way D-Type
plug for the power connections and access to the GPIs
Mounting: Two M3 threaded inserts (50mm apart) facilitate
mounting to a suitable back plate. Q-Down Mini can be orientated
in any direction
VIDEO INPUT
One HD or SD input with reclocking
270Mbit or 1.485Gbit serial compliant to EBU 3267-E, SMPTE
259M and SMPTE 292M
HD cable equalisation up to 140m with Belden 1694 or equivalent
(approx. 100m with Belden 8281). SD cable equalisation >250m
Belden 8281 or equivalent
Input return loss: -15dB for 50MHz to 1.5GHz
Input fail output: Blue
DOWN CONVERSIONS
720p50 to 625/50
720p59.94 to 525/59.94
1080i50 to 625/50
1080i59.94 to 525/59.94
VIDEO OUTPUTS
One loop-through of the HD or SD input, one dedicated SDI
output and three video outputs
The three video outputs can be a mixture of SDI and analogue
(PAL/NTSC, Y/C, YUV and RGB) and are configured using
combination of switches on the outside of the box and three
internal moveable links
Output frame rate same as input frame rate
Component: YUV and RGB 1 Volt +/- 2% into 75 ohm. Syncs on
R, G and B
Composite: 1 Volt +/- 2% with syncs into 75 ohm. Selectable
setup and Betacam levels
ANALOGUE COMPONENT PERFORMANCE
Sampling: Video input is 10 bit processed for 12 bit output DACs
Frequency response:
Luminance: +/- 0.3dB to 5.5MHz
Chrominance: +/- 0.4dB to 2.5MHz
Noise: <-67dB weighted luminance or chrominance
Gain error: < 1%
ANALOGUE COMPOSITE PERFORMANCE
Sampling: Video input is 10 bit processed for 12 bit output DACs
Frequency response:
Luminance: +/- 0.3dB to 5MHz
Noise: <-67dB weighted luminance or chrominance
Differential gain: < 2% typ.
Differential phase: +/- 1 degree typ.
PICTURE PROCESSING (HD TO SD)
Sophisticated two dimensional filtering gets broadcast results and
avoids the complication of looking at multiple fields or movement
detection. It avoids aliasing while retaining picture sharpness, and
results in reliable, artefact-free conversion with broadcast filter quality
When down converting the performance can be optimised by
choosing one of four alternative filter characteristics (softest, soft,
sharp and sharpest)
When the input is SD the processing is bypassed, so that the
signal is passed without degradation
ASPECT RATIO CONVERSION
16:9 Anamorphic (for 16:9 SD systems) and either 16:9 to 4:3
Letterbox or 16:9 to 4:3 Full Screen with centre cut (for 4:3 SD
systems)
Selected by using the switches on the outside of the box or GPIs
LED INDICATION OF:
Power present
Input present
GPI INPUT LEVELS
Active pull to ground, pulled up to +5V through 10 kohm
GPI OUTPUT LEVELS
Electrically: Open collector transistors 48V, 270 ohm current limit
resistors. Pulled up to +5V through 6800 ohm
GPI INPUTS
Four GPI inputs – two used to select aspect ratio (switch 1 and 2
should be set to follow GPI)
GPI OUTPUTS
Two GPI outputs – one indicating loss of input
LOCAL CONTROL
All settings are configured by mini DIP switches on the outside of
the box:
Switches 1 and 2 set the aspect ratio conversion
Switches 3 and 4 select the analogue output format (used in
combination with three internal links that select analogue or SDI
output)
Switches 5 and 6 set the video delay
Switch 7 adds or removes a +7.5IE pedestal for NTSC-M or NTSCJ (ignored if the analogue video is PAL)
Switch 8 selects Betacam levels when the output format is set to YUV
Switches 9 and 10 select the filter characteristic
ORDERING INFORMATION
FIXED VIDEO DELAY
There are three video delay settings available:
• ‘minimum’ – the video processing delay. With an HD input the
delay is 16 SD lines (Anamorphic or Full Screen) or 52 SD lines
(Letterbox). With an SD input the delay is 3.8us
• ‘fixed’ (52 SD lines) – this allows the aspect ratio to be changed
live on air without any picture disturbance, for example
• ‘frame’ – can be used to match a variety of equipment or to
connect with equipment that has no delay
Q-Down Mini Minibox broadcast down converter with
one reclocked HD or SD input loop-through, one
dedicated SDI output and three configurable Standard
Definition outputs
Q-Down Mini PSU External universal AC power supply
for Q-Down Mini
Performance and features are subject to change. Figures given are typical measured values. Q-DOWNMINI1109
Crystal Vision Ltd. Lion Technology Park, Station Road East, Whittlesford, Cambridge CB22 4WL, England.
Tel: +44 (0)1223 497049 Fax: +44 (0)1223 497059 E-mail: sales@crystalvision.tv www.crystalvision.tv
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