Transvideo wireless systems

By Alexander Markelov

Review contents:

Wireless Systems for Sound and Video Transfer from Camera Systems of Wireless Signal Transfer DynaPix Triad of DTC Communications Company Equipment of GMS Company Digital wireless system of receiving-transfer of sound and image signals of Grass Valley a Thomson Brand Company On-camera WRP20 System of IRTE Company (Italy) Wireless Transfer of Data from DY-DV5000 Camera with the Help of KA-DV 5000 Adapter Link Wireless Camera System is New Equipment form New Manufactures Swiss Wireless COFDM Systems Livetools in Russia Miniature Color Microdic Video Camera with Transceiver Wireless Systems of Video Transfer from Premiere Wireless Tandberg Wireless Operators’ Systems Reporter’s Radio Extender Teleview Reporter is Wireless Digital System of Video Signal Transfer “Camera-MTU” Transvideo wireless systems

About 17 years ago in the quiet small town in Normandy on the north of France the small firm appeared which was headed by talented engineer and businessman Jaques Delaco. The specifics of equipment manufactured by this company was defined from one side by the need of cinema and television for the new systems of transmission and picture control, and from the other side by technical requirements of French military men which needed the similar equipment for use in aviation and other kinds of military forces.

The years of hard work and technical researches gave certain results. Portable video signal transmitters were created which found their implementation not only in TV and French aviation but in American astronautics (NASA) and in the other fields.

Not so far I visited one of the most famous in Russia TV studios where I took part in the Lighting equipment installation. In purpose of getting acceptable picture of a scene a chief camera man needed ten times went from the studio monitor to correct the light, decorations and then went back to the monitor to verify an image. This is time consuming and pretty routing work. Setting the light process could be simplified if this camera man had mobile Transvideo monitor with video signal receiver by means of which he could be able to correct a picture being located right next to object to be shot. In this case as well as in many others a presence of mobile monitor with autonomic power supply simplifies a lot lighting and decoration setup and speeds up a shooting process. In this way shooting groups work in cinema production. The Matrix, Gladiator, Harry Potter, Monkey Planet — these are only few movies in production of which Transvideo equipment was used.

Carrying case for Titan system

In the recent time very fast development of electronic cinema is obscured. Nevertheless, the principles and methods of feature movies being it in electronic cinema of in classic one are the same.

By this reason a number of electronic devices produced by Transvideo for classic cinema for example, Titan transmitter/receiver pair or Atlas, Pegasus and Gercules television signal receivers became successfully used in electronic cinematography.

Titan

Titan series transmitter and receiver of video signal is the one of most successful products of Transvideo. They dedicated to work in combination with LCD monitors. Very light and compact they consume less than 2 W of energy each. Moreover, this is the world first portable pair which transmits video signal in microwave range of 2.4…2.5 GHz. What is important that this range is officially permitted for use in the majority of civilized countries.

Plus, these waves have high energy and intrusion availability which gives a possibility to use this pair for video signal transmission under condition when video cable use for shooting is impossible in principle.

Titan has five fixed channels on a range of 2401.5…2481.5 MHz. It weights 200 grams. The size is 105×72×25 mm, working temperature range — -25…+65°C, power consumption — 1.9 W for transmitter and 1.8 W for receiver, voltage — 9…36 V. It use composite video signal of 1 V on the 75 Ohm load. The system has video signal recovery circuit. Signal is being even passing through walls. Signal transmission bandwidth is 5.5 MHz. The distance for signal transmission for transmission-receiving pair in the direct vision zone is about 300 m. Small size and light weight make this system convenient for use in studio and in the field.

But it is necessary to note that Titan transmission-receiving pair first of all is dedicated to work with mobile LCD monitors and can not replace more powerful professional transmitters and receivers of video signal.

Hermes & Pegasus

Hermes receiver	Atlas receiver

Hermes and Pegasus are the first really professional mobile receivers of television video signal and they weight about 380 and 256 g respectively. These two new multichannel tuning modules at high frequencies UHF/VHF can be used in conjunction with any monitors.

Pegasus is more portable than Hermes because it doesn’t have battery compartment and power feeding XLR4 connector. It works from power source of 8…28 V DC.

Hermus is more diverse: power feeding range is 8..28 V DC. The power can be fed in any of three ways: through XLR4 or Hirose6 connectors or from 8AA battery (for work during 8 hours).

Atlas is the only very flat receiver of television signal in the radio range which offers user all the possibilities and ease of modern technologies. This multichannel UHF/VHF/CATV tuning module can be used in conjunction with any monitor. It receives both video and audio signals.

Atlas can be used both in scanning and digital modes. Using a internal memory one can program and recall at any moment up to 85 channels (75 standard channels and 10 personal frequencies). Reliable and easy to use keyboard produces audio alarm upon pressing any key and it has a backlit for poor lighting conditions.

Atlas has green LED display for positive identification of each channel. The display lets read channel numbers (00…99) and their frequencies in MHz.

Atlas provides very stable reception due to digital tuning and really professional demodulator.

Innkoopto Company presented the material