WisyCom MTK952 Uživatelský manuál stáhnout pdf (Strana 3)

Wisycom Srl - Via Spin, 156 - I-36060 Romano d’Ezzelino (VI) - Italy

tel. +39 0424 382605 fax. +39 0424 382733 http:// www.wisycom.com - e-mail: [email protected]

Subject to change without notice

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 : 50 ohm.

• 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.

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