While Old Europe is still in the all-analog era, Zaxcom turned to all-digital, but its American competitor, Lectrosonics, has taken a middle road that seems effective. Digital Hybrid relies on analog FM wireless link transmission of an 24-bit audio signal. The result is much higher dynamic range than wireless systems, using a compandor, are able to offer. The principle is to perform a 24-bit A/D conversion before transmission, and reverse conversion at reception. This consequently induces a latency period, exactly 1.5 ms for the receiver alone, and 3 ms for the transceiver system.
The SMDB/E01 is a miniature Digital Hybrid transmitter with 50 mW radiated power, for 256 frequencies by 100 kHz steps. Two AA alkaline batteries provide 6 hours battery life. The settings, made with protected push buttons, audio input gain, frequency, lock mode, sleep mode, roll-off filter, are displayed on an LCD screen and can be controlled by the RM tone-remote control which has the same interface. Three LEDs indicate transmitter status and modulation level. This transmitter should fit as well feature than documentary or news, provided mic connections are turned to mini XLR TA5F.
The SRA is a dual diversity Digital Hybrid receiver, same size as the Sennheiser EK 3241, designed for video camera standard slots. It enables direct reception of two channels simultaneously, a must for documentary and news. Each receiver offers choices of 256 frequencies by 100 kHz steps, with 25.5 MHz frequency range. 16 frequency blocks are available at 470-862 MHz range. The settings, frequency, output level, phase, transmitter battery type, diversity mode, compatibility mode, noise reduction and reference signal are made by protected push-button with LCD display. A full range of accessories adapts the SRa receiver for different camera slots, single or dual channel, or autonomously with independent outputs on TA3M connectors and 6-18 VDC power input on Sony screw jack.
The VR Field is a modular multiple receiver with integrated antenna multicoupler. It can receive up to six Digital Hybrid channels through VRS receiver modules, in 256-frequencies blocks by 100 kHz steps, with 25.5 MHz frequency range. Nine blocks are available to cover the 470-691 MHz frequency range. The Lectrosonics multicoupler is limited to a 222 MHz frequency range. In comparison, the Rik'Art system has a 400 MHz frequency range from 470 MHz to 870 MHz.
A rotary push-button encoder allows VRS and multicoupler modules setting with LCD display. These settings can also be done on a PC with a USB or RS422 interface. A slot for NP format (Ni-MH or Li-Ion) battery can autonomously power the whole system, with 1.05 A at 18 V power consumption.
For optimum reception, even in disturbed environments, DC Audiovisuel recommends to associate VR Field with a pair of Sennheiser AD 3700 antennas with integrated AB 3700 booster. In addition to the standard antenna diversity, the VR Field allows receiver diversity, combining two VRS modules for the reception of a single channel.
The VR Field is rented with two VRS receiver modules; four additional optional modules can be combined with it.
Lectrosonics receivers are compatible with Sennheiser transmitters SK series (5212, 5200 and 3000) thus providing many opportunities of use both for fiction and on TV set.
Come now and try Lectrosonics Digital Hybrid wireless system at DC Audiovisuel, our technicians are at your service for you to discover all the benefits.
What they think about
Monday 05 December, 2011
J'adore ces emetteurs et me demande, si des comparaisons ont déjà été faites quand au couplage avec un micro à ruban, type Beyer M160?
en d'autres termes: le SMDB avec adaptateur TA5-Xrl permet-il de transporter aussi bien ou mieux que le M160 que s'il est pluggé au SKP3000 de Sennheiser ?
Pour une réception sur un SRa Lectrosonics, évidement?
Merci de vos essais, Fabrice