Funksysteme

MRK-960

Modular Wireless Microphone Receiver System
19"/1HE Modul, stapelbar, Dual True Diversity Receivers

Beschreibung

Dieses Funkempfängersystem steht für höchste Empfindlichkeit und Intermodulationsstörfestigkeit. Es garantiert beste Performance im Wireless-Betrieb, sogar bei Anwesenheit von DVB-T Signalen. Der MRK960 ist, dank seiner automatischen Setupfunktionen, einfach und schnell zu bedienen. Mehrere Systeme lassen sich über die USB-Schnittstellen miteinander verbinden um einfach eine Multikanalanlage einzurichten. Diese kaskadierten Module können dann über Netzwerk konfiguriert und überwacht werden.

Technische Daten

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)
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 or 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
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

Hersteller

Features

  • Hohe Schaltbandbreite: bis zu 370MHz in 25KHz-Schritten durchstimmbar
  • Extrem störfest: IIP3 > 20dBm, praktisch intermodulationsfrei
  • Leistungsfähig und schnell: Sharc DSP von Analog Devices (2 Gflops und 40bit) - Latenz 0.39ms (AES Out) bzw. 0.46ms (Analog Out)
  • Audioausgänge: analoge (elektronisch symmetriert) und digitale (AES3) Ausgänge
  • Netzwerk: USB und Ethernet 10/100 (RJ45) Schnittstelle für Konfiguration, Monitoring und Kaskadierung der Systems
  • Automatischer Scan für beste Frequenz und Squelch
  • Infrarot Schnittstelle zur Senderprogrammierung
  • PC Anwendersoftware: Monitoring, Setup, Spectrum Analyzer Modus, Intermodulationsberechnung

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