MRK 960 Modular Wireless-Microphone

MRK960 WIDEBAND TRUE DIVERSITY DUAL RECEIVER
MRK 960
Modular Wireless-Microphone Receiver System
19” 1U module, stackable, with dual true diversity receivers
Main Features
Ma
F
Wide bandwidth: up to 370 MHz with tunable filters (2 ch’s independent):
470 MHz to 840 MHz (Europe TV ch. 21/67) with internal active splitter
Extreme immunity: IIP3 > 20dBm, practically intermodulation free
Powerful and quick: thanks to the latest DSP class “shark” by Analog Design (2Gigaflops 40bit
power), providing the highest audio quality (40bit floating point) and a delay of only 0,39 msec
(AES3 output) and 0,46 msec (analogue output)
Audio quality: Analogue (electronically balanced) and digital output (AES3)
Network: 2 USB’s connectors for configuration/monitor and cascade rack connections and a
Ethernet 10/100 base TX port (RJ45) for network connection
Automatic scan: for best channels, squelch and other automatic setup
Infrared interface (i.e. for system setup, microphone programming).
Automatic reprogramming of transmitter (thru infrared)
PC Software to monitor/setup units, spectrum analyzer mode, intermodulation free frequencies
calculator, embedded database by area or to archive existing setups
Optional (upgradable):
Multicompanding (/DIGCOM960)
Ethersound interface in alternative to AES3 (/ETS)
Patented PTT (Push to Talk) function with audio exit and GPI signals (/PTT)
Low impedance transformers outputs (/XLR on line ports or /XRC on ptt ports)
General Description
The system presents exceptional selectivity and inter-modulation immunity for best operating performance of
the wireless-microphone system even in the presence of DVTB-T transmitter’s signals.
MRK 960 is designed to be:
§ “easy & quick to use” thanks to automatic setup functions (i.e. frequencies, squelch), remote
configuration utilities (USB/Ethernet), display with intuitive context menu navigation.
§ “extremely flexible”, in fact each of the two receivers can work in a 370 MHz bandwidth, more than one
rack can be connected together thru a simple USB cable to act a multi-channel receiver.
Moreover, the DSP interface allows the units to work with several digital audio output (i.e. AES/EBU,
Ethersound,), multi-companding compatibilities and other digital features.
§ “best in class performances”, thanks to the latest Wisycom technology the unit has extreme RF
sensitivity and immunity and superb audio quality.
§ “a durable & upgradable investment”, thanks to the very robust design (aluminum housing) and the
possibility of upgrade/enhance unit’s performances with simple slot in card (pc-like thru the DEXB
expansion bus).
Moreover, MRK 960 system is already set up for the exclusive PTT function, recently developed by Wisycom
and now appreciated in the broadcast world. It’s able to work directly with the new wireless microphones
provided with built-in telemetry (either body-pack or hand-held transmitters) and Push-To-Talk button:
simply pushing this button, the presenter causes the remote switching of the receiver’s output-line, from the
“main line” to the additional “intercom line”, in order to be able to talk “off-air” directly with the technical
team (optionally a stuttering tone is back generated to signal the presenter of the push to talk status).
Wisycom Srl Unipersonale - Via Spin, 156 - I-36060 Romano d’Ezzelino (VI) - Italy
tel. +39 0424 382605 fax. +39 0424 382733 http:// www.wisycom.com - e-mail: sales@wisycom.com
Iscrizione al Registro A.E.E. n. IT09100000006319
Subject to change without notice
MRK960 WIDEBAND TRUE DIVERSITY DUAL RECEIVER
MRK 960
Modular Wireless-Microphone Receiver System
19” 1U module, stackable, with dual true diversity receivers
TECHNICAL SPECIFICATIONS
• Frequency ranges : up to 370 MHz switching bandwidth in 470/940 MHz
• Switchable channels : 2400 managed in 40 groups ofr 60 frequencies completely user customizable
• Frequencies : microprocessor controlled PLL frequency synthesizer circuit, with 25 KHz minimum step.
• Frequency error : < ± 2.5 ppm, within the rated temperature range.
• Temperature range : -10 ÷ + 55 °C.
• Modulation : FM (50µs de-emphasis), other de-emphasis can be pre-set on request and can be recalled from the menu.
• Nominal deviation : ±40 KHz @ 1 KHz, ±65 KHz peak (Max acceptable deviation = ±80 KHz).
• “A” / “B” antenna inputs : with BNC type female connectors.
• RF input impedance : 50 ohm (SWR < 1:2).
• Sensitivity [1] : < 0.9 µV (-1 dBµV), for SND/N = 52 dBA[2], in the whole switching-range;
< 10 µV (+20 dBµV), for SND/N = 115 dBA[2], in the whole switching-range.
• Amplitude response : < 0.2 dB (for RF input signal: +4 dBµV ÷ +120 dBµV).
• Co-channel rejection : > -3.5 dB @ 2 µV RF; > -1.5 dB @ 100 µV RF.
• Adjacent chan. selectivity: > 90 dB @ ± 300 KHz.
• Spurious rec. rejection : > 90 dB.
• IF image rejection : > 110 dB.
• IIP3 : >= +20 dBm (typical)
• Spurious emissions : < 1pW (typical. = 0.1 pW).
• Squelch : - signal strength squelch: with menu adjustable threshold and “adaptive type” working: the receiver adapts
itself automatically to different conditions of both medium strength and speed variation of the received signal;
- tone-squelch: it works by decoding the special key, sub-carrier (digitally modulated) present on the carrier of the
actual Wisycom transmitters. The tone squelch function can be inhibited for compatibility with other types of
transmitters.
• Noise Reduction system : compander circuit, can be pre-set (or switched off) to the following modes:
- ENR (Wisycom Extended-NR) as default;
- CUSTOM (to be compatible with other brands transmitters).
• AF line output electrically balanced on XLR-3M connector (option XRL, transformer with 30 Ohm imp.)
• AF line output level : +12 dBu (3.1 Vrms) @ nominal deviation.
• AF line output peak level : +20 dBu (7.75 Vrms).
• AES3 on XLR-3M with word clock in/out
• AF bandwidth : 40 Hz ÷ 20 KHz.
• Frequency response : < ±0.5 dB (±0.2 dB typ.) in the 50 Hz ÷ 19 KHz range.
• Distortion : < 0.3 % (0.10 % typ.) @ peak deviation.
• SND/N ratio [1] > 115 dBA (118 dBA typ.) [2].
• Monitor output : 1/4” (6.3 mm) stereo jack connector.
• Monitor output level : max 6 Vrms / 150 ohm.
• Monitor out impedance : 100 ohm for auricle.
• Diversity technique : true-diversity (Twin receiver circuits).
• Bar-graph meters : - RF field strengths (both “A” and “B” inputs) - AF deviation (5% ÷ 150%), with peak-hold mode.
• Display: 64 x 256 OLED (yellow)
• Calibrating AF tone : 1 KHz, +12 dBu (other on request).
• Powering : 99 ÷ 138 Vac and 187 ÷ 264 Vac, with automatic switching / 100 VA max.
• Dimensions : 19”/1U.
• 2 USBs type A/B for network connection and devices cascade
• 10/100 Base TX Ethernet port on RJ45 connector
Note [1]: ENR-system included.
Note [2]: RMS value, A-weighted, 22 Hz / 22 KHz, and referred to the peak deviation.
The MRK 960 Receiver System complies with ETSI 300 422.
Wisycom Srl Unipersonale - Via Spin, 156 - I-36060 Romano d’Ezzelino (VI) - Italy
tel. +39 0424 382605 fax. +39 0424 382733 http:// www.wisycom.com - e-mail: sales@wisycom.com
Iscrizione al Registro A.E.E. n. IT09100000006319
Subject to change without notice