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

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

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 30V, 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 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 NTSC-J (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