Technical Specification - WisyCom MRK960 User Manual

Technical specification

• • Two indipendent receivers tunable in all the specified frequency range
• • Frequency range:
470/840 MHz (TV ch 21/62)
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with internal active splitter
• • Memorized channels: up to 2400 divided in 40 groups with 60 channels each
• • Frequencies: microprocessor controlled PLL frequency synthesizer circuit,
with 25 KHz minimum step (others on request)
• • Frequency error: < ± 2.5 ppm, within the rated temperature range.
• • 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 devia-
tion = ±80 KHz).
• • "A" / "B" antenna inputs: with BNC type female connectors.
• • "A" / "B" antenna input booster supply: 12Vdc 200mA max.
• • RF input impedance: 50 ohm (SWR < 1:2)
• • Sensitivity [with ENR]:
< 0.9 µV ( -1 dBµV), for SND/N = 52 dBA, in the whole switching-
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range [Rms value A weighted]
< 10 µV (+20 dBµV), for SND/N = 115dBA, in the whole switching-
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range [Rms value A weighted]
• • Amplitude response: < 0.2 dB (for RF input signal: +4 dBµV ÷ +120 dBµV)
• • Co-channel rejection:
> -3.5 dB @ 2 µVRF
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> -1.5 dB @ 100 µV RF
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• • Adjacent chan. selectivity: > 90dB @ ±300 KHz
• • Spurious rec. rejection: > 90 dB
• • IF image rejection: > 110 dB
• • IIP3 (Input 3° order Intercept Point):
> 20 dBm
• • Spurious emissions: < 1pW (typ. = 0.1 pW)
• • DSP audio board, 40bits floating point DSP processor for high dynamic
range low noise multicompander audio processing and digital data detec-
tion. 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)
• • Squelch :
signal strength squelch: with menu adjustable threshold and
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"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
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(digitally modulated) present on the carrier of the actual Wisycom
transmitters. The tone squelch function can be inhibited for com-
patibility with other types of transmitters.
• • 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
Pag. 24
MRK960
• • Noise Reduction system : compander circuit, can be pre-set (or switched
off) to the following modes:
ENR (Wisycom Extended-NR) as default
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CUSTOM (to be compatible with other brands transmitters)
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• • AF line output
electrically balanced on XLR-3M connector (option XRL, transform-
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er with 30 Ohm imp.)
AF line output level: +12 dBu (3.1 Vrms) @ nominal deviation
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(could be individually attenuated by 30dB by means of a switch on
the back panel under the XLR connectors)
AF line output peak level: +20 dBu (7.75Vrms)
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AF line output connector: XLR, pin 1 could be grounded or floating
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by means of a switch on the back panel under the XLR connectors.
Could withstand up to +52 Vdc of phantom supply
• • 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 % (0.1 % typ.) @ peak deviation, ENR noise reduction sys-
tem enabled
• • SND/N ratio [1] > 115 dB (118 dB 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
• • AES/EBU (AES3) board, externally synchronized:
balanced transformer isolated output
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24 bit professional audio stream
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word clock input from 32KHz to 108KHz, BNC connector
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word clock input impedance: 75Ω or high Z externally switchable
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word clock output on BNC connector for cascading more units
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• • Diversity technique: true-diversity (Twin receiver circuits)
• • Bar-graph meters:
RF field strengths (both "A" and "B" inputs)
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AF deviation (5% ÷ 150%), with peak-hold mode
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• • Displays: nr. 2, one each receiver, 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
• • Temperature range: -10 ÷ + 55 °C
• • Dimensions: 19"/1U, depth 370mm
• • 2 USBs type A/B for network connection and devices cascade
• • 10/100 Base TX Ethernet port on RJ45 connector
dual true diversity receiver