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Q-Down Mini

What is it?

Q-Down Mini minibox short-delay down converter and distribution amplifierHD/SD short-delay broadcast down converter and distribution amplifier in a minibox.

Reason to choose it...

Because no other minibox down converter shares Q-Down Mini's level of conversion quality nor the short processing delay of just 16 lines which eliminates the need to compensate audio signals for the video delay. Plus there's the flexible outputs – with one loop-through, a dedicated SDI and three SD outputs configurable as mixtures of analogue and digital.

Ideal for...

You need to provide down converted feeds for your SD monitors – and you've run out of rack space. It's perfect for attaching directly to the back of monitors.

Got a question?

We would be very happy to answer any questions you've got about the Q-Down Mini. Either send us an e-mail or get an immediate response by speaking to us now on our Live Chat...

 
  • Main features
  • Details
  • Specs
  • What outputs do I get?
  • What do I order?
  • Who's using it?

Main features

  • Short-delay broadcast down converter in a minibox
  • Ideal for attaching directly to the back of a monitor and providing down converted feeds - compact 165mm x 80mm x 28mm size
  • Can down convert 720p HD, 1080i HD and SD at both 50Hz and 59.94Hz
  • Get flexible outputs when down converting: configure the three video outputs as mixtures of SD digital and analogue (composite, Y/C, YUV and RGB)
  • Unique level of image quality at this price level - sophisticated two dimensional filtering gives broadcast results without the complication of looking at multiple fields or movement detection
  • Optimise the performance for your material with four different filter characteristics (sharpest, sharp, soft and softest)
  • Short processing delay (just 16 or 52 SD lines) - no need to compensate audio signals for the video delay
  • Match other delays in system: select one of the three fixed video delay settings (minimum, 52 SD lines or frame)
  • Includes HD to SD aspect ratio converter, with 16:9 Anamorphic, 16:9 to 4:3 Letterbox and 16:9 to 4:3 Full Screen with centre cut
  • Local control: configure settings with mini DIP switches on the box or GPIs
  • Separate external universal AC power supply available
  • Note: Does not use a frame nor a rear module
  • Five year warranty (with product registration)

Details

Down converting when you're short of rack space

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.

Unique level of image quality in its price range

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 - sharpest, sharp, softest and soft.

Flexible analogue and digital output combinations

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.

Easy to keep everything in sync

Q-Down Mini’s short processing delay of just 16 lines ((or 52 lines with Letterbox conversions) eliminates the need to compensate audio or other signals for the video delay, keeping everything in sync and making your system design much simpler - and makes it easy to detect real lip sync errors when you're monitoring the video and listening to separate audio.

Match other delays in your system

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.

HD to SD aspect ratio conversion - built in

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.

Easy to fix to a monitor

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.

Control, LEDs and power

Q-Down Mini PSUAll 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 (pictured here) available.

 

Specs

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

270Mb/s or 1.5Gb/s serial compliant to EBU 3267-E, SMPTE 259 and SMPTE 292-1

HD cable equalisation up to 140m with Belden 1694A 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

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

DOWN CONVERSIONS

720p50 to 625/50

720p59.94 to 525/59.94

1080i50 to 625/50

1080i59.94 to 525/59.94

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 5 MHz

Noise: <-67dB weighted luminance or chrominance

Differential gain: <2% typ

Differential phase: +/- 1 degree typ.

PICTURE PROCESSING WHEN DOWN CONVERTING

Sophisticated two dimensional filtering gets broadcast results and avoids the complication of looking at multiple fields or movement detection, resulting 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 (sharpest, sharp, soft, softest)

When the input is SD the board processing is bypassed, so that the signal is passed without degradation

HD TO SD 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

 

What outputs do I get?

Q-Down Mini is different to the rest of the Crystal Vision product range. It is a minibox and so does not fit in a rack frame nor use a rear module.

Q-Down Mini provides 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.

Q-Down Mini inputs and outputs

 

For more visual technical information, download the Q-Down Mini block diagram.

What do I order?

Request a quote...

Read the ordering info below then fill in this form to request a quote for the Q-Down Mini minibox down converter and distribution amplifier and accessories...

Your contact details
Items for quote

First you need the 165mm x 80mm x 28mm minibox...

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

Next - power. You can create your own power supply, or alternatively buy Crystal Vision's external universal AC power supply below...

Q-Down Mini PSU
External universal power supply for Q-Down Mini, with IEC input and 9-way D-Type output

Because Q-Down Mini is a standalone minibox, you don't need to buy a frame nor rear module. Q-Down Mini is controlled by mini DIP switches on the box or GPIs - therefore you will not require a control panel or PC software.

 

Who's using it?

Users of the Q-Down range of down converters include...

  • 365 Media (Iceland)
  • 4S (Brazil)
  • Advanced System Integrated Co., Ltd. (Taiwan)
  • Arena Television (UK)
  • Atos (UK)
  • ATG Broadcast (UK)
  • AVC (UK)
  • BBC (UK)
  • BBC Studios and Post Production (UK)
  • Chaos Visual Productions (USA)
  • Cheju Technopark (South Korea)
  • Coronation Street/ITV Studios (UK)
  • Crosscam (Switzerland)
  • CTV (UK)
  • CVP (UK)
  • Czech TV (Czech Republic)
  • dB Broadcast (UK)
  • Dega Broadcast Systems (UK)
  • Doordarshan Kendra (India)
  • Duna TV (Hungary)
  • EastEnders (UK)
  • Elektronika (Czech Republic)
  • Emmerdale/ITV Studios (UK)
  • EPIC (UK)
  • Fal Trading (UK)
  • Fountain Studios (UK)
  • Gearhouse Broadcast (UK)
  • Hastings College (USA)
  • HB Communications (USA)
  • Hitachi (Germany)
  • Hollyoaks (UK)
  • Indira Ghandi National Open University (India)
  • ITV (UK)
  • ITV Daybreak (UK)
  • Lime Pictures (UK)
  • Megahertz (UK)
  • Mitcorp (UK)
  • Molinare (UK)
  • MST (UK)
  • MTVA (Greece)
  • NASA (USA)
  • News 24 (Albania)
  • ORF (Austria)
  • Parliament of Afghanistan (Afghanistan)
  • PALS (Turkey)
  • Peachtree TV (USA)
  • Pinewood Television Studios (UK)
  • Playbox Technology (UK)
  • Proactive UK (UK)
  • Prolink Television Facilities (UK)
  • ProSiebenSat.1 Media (Germany)
  • Pro Video Sales (USA)
  • Red Bee Media (UK)
  • RTC Télé Liège (Belgium)
  • RTP (Portugal)
  • Sentinel Broadcast (UK)
  • Show TV (Turkey)
  • SIS LIVE (UK)
  • SKAI TV (Greece)
  • Snader (USA)
  • Sony Europe (UK)
  • Studios A/S (Denmark)
  • STV (Spain)
  • TBS (USA)
  • Teddington Studios (UK)
  • Télésambre (Belgium)
  • Televideo (UK)
  • Telewave (Greece)
  • The Hego Group (Czech Republic)
  • The London Studios (UK)
  • The Moving Picture Company (UK)
  • The One Show (UK)
  • TNT (USA)
  • Travel Channel (UK)
  • TRT (Turkey)
  • Turner Broadcasting System, Inc. [Network Operations Division] (USA)
  • TV 2 (Denmark)
  • TVNZ (New Zealand)
  • TV Skyline (Germany)
  • TV SYD (Denmark)
  • University of Central Florida (USA)
  • University of East Anglia (UK)
  • University of Essex (UK)
  • University of North Carolina Wilmington (USA)
  • University of Teeside (UK)
  • University of York (UK)
  • Vermantia Media Group (Greece)
  • Westminster Live (UK)
  • WGGB-TV (USA)
  • West Ent Productions (UK)
  • WMBB-TV (USA)
  • WMGT-TV (USA)
 

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Not sure which converter is best for your application? Have a look at our up and down converters comparison chart to help you make a decision...