Wisycom MSR916

Technical Data

Switchable channels
16 + 16, preset in the 150 ÷ 250 MHz (VHF) or 470 ÷ 880 MHz (UHF) range (others on request).

Channel groups
2, externally selectable.

Switching-window
15 MHz (VHF); 32 MHz (UHF).

Frequencies
microprocessor controlled PLL frequency synthesizer circuit, with 25 KHz minimum step. They can be easily user-re-programmed by PC and optional “UPK 100 Programming kit”.

Frequency error
< ± 5 ppm, in the rated temperature range.

Temperature range
-10 ÷ +55 °C.

Modulation
FM, with 50 µs de-emphasis.

Nominal deviation
±20 KHz @ 1 KHz. (Max deviation = ±75 KHz).

±40 KHz @ 1 KHz. (Peak deviation = ±60 KHz).

“A” / “B” antenna inputs
with N-F connectors.

RF input impedance
50 ohm (SWR < 1:2; typ. 1:1.4).

Sensitivity (ENR)
< 2 µV ( +6 dBµV), for SND/N = 84 dB [1], in the whole switching range

< 10 µV (+20 dBµV), for SND/N = 96 dB [1].

Amplitude response
< 0.2 dB (for RF input signal between +4 dBµV ÷ +120 dBµV).

Co-channel rejection
> -3.5 dB @ 2 µV RF; > -1.5 dB @ 100 µV RF.

Adjacent ch. selectivity
> 90 dB (for channel spacing ≥ 400 KHz).

Spurious rec. rejection
> 93 dB.

IF image rejection
> 98 dB.

Intermodul. rejection
> 76 dB.• IIP3 (Input 3°-order Intercept Point) = +9 dBm.

Spurious emissions
< 10pW (typ. = 0.1 pW).

Squelch
field strength: with externally adjustable threshold and adaptive-mode working (the receiver adapts itself to the differensituations of medium signal-strength levels and fading speeds).

tone-squelch: with decoding of the matching sub-carrier, digitally modulated, generated by the relevant transmitter. This function can be switched-off for the compatibility with other brand TXs.

Squelch-controlled
is controlled by the squelch circuit. When the AF output line is active, DC output-power the DC input-power is connected to pin 2 of the XLR4-M-DC input-connector on rear panel (max current = 2A).

“Noise Reduction” system
compander circuit, can be internally pre-set (or switched off) to:

ENR (Wisycom Extended-NR).

NR (standard-NR), to be compatible with other systems.

AF line output
transformer balanced, floating • Output impedance = < 50 ohm.

AF output level
+10 dBu (2450 mVrms), @ ±40 KHz deviation.

AF bandwidth
20 Hz ÷ 20 KHz.

Frequency response
< ±0.5 dB (±0.2 dB typ.) in the 30 Hz ÷ 20 KHz range.

Distortion
< 0.3 % (0.15 % typ.) @±40 KHz deviation (< 0.5 % @ peak deviation).

SND/N ratio (ENR)
> 105 dB (115 dB typ.) [1].

Monitor output
1/4” (6.3 mm) stereo jack connector, mono wired, on the front panel.

Monitor output level
max 3 Vrms / 200 ohm, with volume control.

Monitor out. impedance
35 ohm.

Diversity technology
true-diversity (Twin receiver circuits, with high-speed and low-noise electronic switching).

Remote diversity function
the MSR916 receiver, along with audio signal on the line-output, is signalling also the RSSI level. A Centralized Automatic Selector (i.e.: RDA41, suitable for 4 remote receivers) can use this voting information to use in any time select the best audio signal.

Bar-graph meters
RF field strengths (both “A” and “B” antennas at the same time)

AF output level (-20 ÷ +12 dBu).

TX battery lifetime, 5 steps: 100%, 75%, 50%, 25%, 12%

LED indications
diversity switching (“A” / “B” antenna)

AF output-line is active (AF ON)

matching sub-carrier is present (P.TONE)

channel Group 1 selected (#1)

tone squelch function is on (T.SQL)

receiver on.

Powering
10.5 ÷ 16 Vdc / 4 W (typ.:330 mA @ 12 Vdc), negative ground

mains 100 ÷ 240 Vac, by means of separated PSP910-X4 “mains-plug” power supply.

Size
123 x 49 x 327 mm (1/2 x 19”/1U rack).

Weight
1.7 Kg approx.