MRK960

General Description


MODULAR WIRELESS-MICROPHONE RECEIVER SYSTEM

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).


FEATURES

  • 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



Technical Data


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)


Powering

99 ÷ 138 Vac and 187 ÷ 264 Vac, with automatic switching / 100 VA max


Dimensions

19”/1U


Weight

  • 3.85 kg without PTT option
  • 4.10 kg with PTT option


Configuration/monitor interfaces

  • 2 USBS type A/B for network connection and devices cascade
  • 10/100 Base TX Ethernet port on RJ45 connector


[1]: ENR-system included

[2]: RMS value, A-weighted, 22 Hz÷22KHz and referred to the peak deviation



Variants


MRK960-EU

EU power cord


MRK960-UK

UK power cord


MRK960-US

US power cord


MRK960-<Country>-5K

<Country> power cord

5KHz step


MRK960-<Country>-PTT

<Country> power cord

PushToTalk (2 additional AF outputs COM)


MRK960-<Country>-XRL

<Country> power cord

Low impedance Transformers on 2 audio LINE


MRK960-<Country>-PTT-XRC

<Country> power cord

Push To Talk (2 additional AF outputs COM)

Low impedance Transformers on 2 audio COM


MRK960-<Country>-PTT-XRL-XRC

<Country> power cord

Push To Talk (2 additional AF outputs COM)

Low impedance Transformers on 2 audio LINE

Low impedance Transformers on 2 audio COM


MRK960-<Country>-ETS

<Country> power cord

Digital audio ETHERSOUND outputs

(This cannot be installed along with AES3)



Accessories

 

AWB950

UHF whip antenna Wide Band 470-840MHz

BNC connector for MRK950/MRK960





CABB003

Antenna Cable: 30cm with BNC-M/BNC-M connectors 50Ohm






CABB003-75

Coaxial cable: 30cm with BNC-M/BNC-M connectors, 75Ω






CNDT20

RF bulkhead adapter, BNC-F/BNC-F

 







 

 

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