AADA-VF

Distribute analogue audio anywhere

The AADA-VF analogue audio distribution amplifier allows the flexible distribution of analogue audio in any broadcast environment.

The AADA-VF has the essential low noise and distortion which allows the audio to pass through more stages of processing without a loss in quality. It features two separate audio distribution amplifiers, each with an electronically balanced input and four floating outputs which are very robust – should one side be connected to ground, the other will double in amplitude to maintain the difference between the balanced signals, giving a correct single-ended system.

Each output also has an individual line driver which gives excellent isolation between them, meaning a damaged signal injected on to one of the outputs will not affect any of the others.

Configure your inputs and outputs

The AADA-VF can either be configured as a stereo amplifier with four outputs of channel 1 and four outputs of channel 2, or as a mono amplifier with eight outputs of channel 1.

The AADA-VF is used with just one frame rear module, the single slot VR21.

Adjust the gain

The AADA-VF features the most extensive gain adjustment Crystal Vision has ever offered, meaning it can handle a wide variety of input signals and allowing you to easily match the audio to your standard setting.

With fine adjustments in 0.5dB increments, the gain controls will give +/- 30dB of gain relative to the input level, although care must be taken not to exceed the maximum output level of +24dBu. Each channel can be adjusted independently.

Monitor your audio

A number of useful monitoring tools ensure you remain aware of exactly what's happening to your audio at all times.

Useful for alerting you that your audio signal has failed or that there is no input, each channel has an individual audio silence detector – with adjustable threshold level and duration to prevent false alarming during quiet audio periods. The audio silence level setting can be selected from -30dBu to -42dBu in 1dBu steps. If the audio signal level falls below the selected level for a chosen period of time from two to 120 seconds, then it is considered 'silent'. Both audio channels share the same silence time and threshold settings.

There is also an overvoltage detector for each channel, with the overvoltage threshold level shared by both channels and adjustable between +12dBu and +24dBu in 1dBu steps.

Both these monitoring tools can be used with SNMP to trigger alarms.

Remote control

All control is done remotely. The control and monitoring options for the AADA-VF include an integrated control panel on the Vision frame, the VisionPanel remote control panel, our ASCII and JSON protocols, SNMP and the VisionWeb web browser control. Try the AADA-VF VisionWeb demo...

There is remote control of dual channel/single channel mode, audio gain, the silence indication time delay and threshold and the overvoltage threshold, and remote monitoring of audio silence and overvoltage for each channel.

Save rack space

Fitting in the standard Vision frames (currently available in 3U size), the AADA-VF is a space-saving 96mm x 325mm card that sits in one frame slot - allowing up to 20 DAs in 3U.

MECHANICAL

Standard Vision card 96mm x 303mm (96mm x 325mm including finger pull)

Weight: 160g

Power consumption: 5 Watts

AUDIO INPUTS

Two analogue audio inputs, electronically balanced

High impedance input (>20 kohm)

Maximum level: +24dBu (>+24dBu inputs clipped to output +24dBu)

AUDIO OUTPUTS

Eight analogue audio outputs, electronically balanced, using VR21 frame rear module

Can be configured as a stereo amplifier with four outputs of channel 1 and four outputs of channel 2, or as a mono amplifier with eight outputs of channel 1

Low impedance outputs: 50 ohm

Maximum level: +24dBu

PERFORMANCE

Signal to noise ratio: 108dB, 0dB gain, 0dBFS = +24dBu (20Hz to 20kHz)

Frequency response: +/-0.05dB (20Hz to 20kHz)

Total Harmonic Distortion (THD): <0.003% 20Hz to 20kHz, +24dBu

Common mode rejection: >80dB (20Hz to 20kHz)

Interchannel crosstalk: <-100dB, 10kHz

GAIN ADJUSTMENTS

Adjustment: -30dB to +30dB in 0.5dB steps (factory default set to 0dB)

Each channel can be adjusted independently

SILENCE DETECTORS

Set period of silence before indication from two to 120 seconds in one second increments

Set silence threshold between -30dBu and -42dBu in 1dBu steps (factory default set to -30dBu)

Both channels share the same silence time and threshold settings

OVERVOLTAGE DETECTORS

Set overvoltage threshold between +12dBu and +24dBu in 1dBu steps (factory default set to +24dBu)

Both channels share the same overvoltage settings

LED INDICATION OF:

Power okay

REMOTE CONTROL

Remote control of dual channel/single channel mode selection, audio gain, silence indication time delay and threshold and overvoltage threshold

Remote monitoring of audio silence and overvoltage for channel 1 and audio silence and overvoltage for channel 2. No input also constitutes silence

Software:

VisionWeb Control is available via the web server on the frame and allows control and monitoring using a standard web browser on a computer, tablet or phone

SNMP monitoring and control available as standard

Control using ASCII and JSON protocols

Hardware:

Control from integrated control panel on Vision 3 frame

Control from VisionPanel 3U remote panel

 

NB. No board edge control available on Vision products

 

Signal inputs and outputs are accessed by using an appropriate rear module.

The Vision rear modules slot on at the back of the frame and typically feature BNC, Micro BNC, D-Type and LC fibre connectors.

There is one rear module available for the AADA-VF...

VR21 rear module label and connections

For more visual technical information, download the AADA-VF block diagram.

First you need the 96mm x 325mm card...

AADA-VF

Dual channel analogue audio distribution amplifier

Next select your frame...

Vision 3

3U frame with integrated control panel and smart CPU for up to 20 Crystal Vision cards from the Vision range. Includes two PSU3-VF power supplies for redundancy. Allows Ethernet connection to a PC

You need a rear module to access your inputs and outputs...

VR21

Single slot frame rear module. Allows 20 AADA-VF in 3U. Gives access to two analogue audio inputs with four analogue audio outputs of each channel (or eight outputs of one input)

Finally - control. Use the frame's integrated control panel, the VisionWeb web browser control or SNMP (both included in the frame for free), or alternatively order the item below...

VisionPanel

3U Ethernet remote control panel with touch screen

 

Users of the AADA analogue audio distribution amplifiers in the Indigo and Vision ranges include...

4KXL (UK) Advanced Broadcast Services (UK) Advanced System Integrated Co., Ltd. (Taiwan) Advent Communications (UK) Al Jazeera (Qatar) Alter Ego Media S.A. (Greece) Antenna Hungária (Hungary) Antenna TV (Greece) ANTV (Vietnam) Arabsat (Saudi Arabia) Arqiva (UK) Astro (Poland) AVC (UK) Bắc Ninh TV (Vietnam) Bath Spa University (UK) BBC (UK) BBC Millbank (UK) BBC Northern Ireland (UK) BBC Scotland (UK) BBC Studioworks (UK) BBC Wales (UK) BBC World Service (UK) BFE Studio (Austria) Channel 4 (UK) Channel 9 (Greece) Channel 10 (Greece) Channels TV (Nigeria) Chatham House – The Royal Institute of International Affairs (UK) Chicopee Telecom (USA) Chiyoda-Video (Japan) Chukyo TV Broadcasting (Japan) City of Glasgow College (UK) City University London (UK) Comux (UK) Coronation Street/ITV Studios (UK) Cotswold Communications (UK) Covetel (Venezuela) Crete TV (Greece) Custom Consoles (UK) CVP (UK) Czech TV (Czech Republic) dB Broadcast (UK) Dega Broadcast Systems (UK) DigitalWide srl (Italy) Doordarshan Kendra (India) E to E (UK) Eddystone Broadcast (UK) EDI Effetti Digitali Italiani Srl (Italy) Emmerdale/ITV Studios (UK) EMMRC - Educational Multimedia Research Centre (India) EMS (UK) Encore Broadcast Solutions (USA) ERT (Greece) ESPN Star Sports/Fox Sports (Singapore) ETI-Electronic Technology Inc. (USA) Euronews (Albania) Eurosport (Greece) FAL Systems (UK) FB TV (Turkey) Foss Productions (Greece) Fountain Studios (UK) Gee Broadcast Systems (UK) Gems TV (India) Gibraltar Broadcasting Corporation (Gibraltar) Giga-Com (UK) GigaSat (UK) Global (UK) GMTV (UK) Habertürk TV (Turkey) Hai Duong Radio and Television Station (Vietnam) Hangzhou Justtong Network Technology inc.,Ltd. (China) Hangzhou TV (China) Hayfisher Productions (UK) HB Communications (USA) HD Vietnam (Vietnam) Hollyoaks/Lime Pictures (UK) Houses of Parliament (UK) HTV (Vietnam) Ideal Shopping Direct (UK) INA TV (Greece) Indira Ghandi National Open University (India) International Criminal Court (Netherlands) ITV (UK) ITV Studios (UK) Jewellery Maker (UK) JKS Inc. (USA) Kapa Studios (Greece) Kingsway International Christian Centre (UK) Kontra (Greece) KT - Korean Telecom Media (South Korea) Links Broadcast (UK) Media Broadcast Technology (Vietnam) Mediaspec (UK) Medialogy Engineers Ltd. (UK) Megahertz Broadcast Systems (UK)

MEGA TV (Cyprus) Molinare (UK) MTV (Greece) National Assembly for Wales (UK) National Performing Arts Center (Taiwan) News 24 (Albania) Nova TV (Bulgaria) OneSource Distributors LLC (USA) Open TV (Greece) ORF (Austria) Oxford Sound & Media (UK) Pinellas County Schools (USA) PLD Production (Greece) Prodigy Enterprises Inc. (China) Puls 4 (Austria) Radio Televisyen Malaysia (Malaysia) Reality TV Channel (Greece) Royal College of Music (UK) Royal Opera House (UK) RTC Télé Liège (Belgium) RTÉ (Ireland) RTVS (Slovakia) Russia Today – London Bureau (UK) Sat-Comm (UK) Scottish Parliament (UK) SEC - Supreme Education Council (Qatar) Show TV (Turkey) Siemens (UK) SIS LIVE (UK) Smart TV (UK) Soc Trang TV (Vietnam) Studios A/S (Denmark) STV (Spain) STV (UK) Supersonic TV (Albania) Supersport (South Africa) SZTV - Szombathelyi Televízió (Hungary) TBS (Taiwan) TCS Telecom e Serv. Srl (Italy) Tele Bruxelles (Belgium) Telecentras (Lithuania) Telemedia (South Africa) Télésambre (Belgium) TeleStudio Modena (Italy) Teletech (Japan) Teltechco (Vietnam) Televideo (UK) Telewave (Greece) Thameside (UK) The ADI Group (UK) The Federation of Small Businesses (UK) The Jewellery Channel (UK) The Military Broadcasting Centre (Vietnam) The One Show (UK) Toshiba (UK) TP Emitel (Poland) TRT (Turkey) Türkmeneli Televizyonu (Turkey) TV AlHijrah (Malaysia) TV Globo (Brazil) TV 2 (Denmark) TV 360 (Turkey) TVP (Poland) TV Skyline (Germany) TVT – Television Versioning & Translation Ltd. (UK) UBE Service (UK) United Broadcast & Media Solutions LLC (UAE) Universal Media Services (USA) University of Central Florida (USA) University of Essex (UK) University of York (UK) Videocation (Germany) Viettel TV (Vietnam) Vinh Long Radio and Television (Vietnam) Vinh Puhc TV (Vietnam) Vislink Broadcast (UK) VSC Design (UK) VTC (Vietnam) VTV5 (Vietnam) Westminster Live (UK) William Hill (UK) WTS Broadcast (UK) Wyre Broadcast Solutions (UK)