MTB40S

General Description


WIDEBAND PLUG-ON TRANSMITTER

MTB40S is an extremely small and light plug-on transmitter especially designed for professional wireless microphone applications.

MTB40S benefit of the latest Wisycom RF technology along with an enhanced robustness against noise and inter-modulation.

Improved features:

  • New white OLED display
  • New XLR locking system
  • Integrated HW limiter


FEATURES

  • Up to 232 MHz bandwidth in 470/798 MHz range
  • Enhanced robustness against self-interferences and antenna performances thru a proprietary “intermodulation cancellation” circuit
  • Miniature design with flexible pcb (no connectors) for extended reliability
  • User selectable companding systems

   ENR (noise optimized)

   ENC (voice optimized)

  • Input dynamic extension with an integrated HW limiter (30 dB above peak)
  • P48 phantom power for condenser microphones
  • New white OLED display (128 x 32 pixels)
  • New XLR-3F connector with locking collar to ensuring an extremely tight noiseless fit!
  • Infrared interface for management and firmware update
  • Audio input circuitry with high linearity audio transformer
  • Battery: 2 AA Alkaline or rechargeable NiMH



Technical Data


Switchable channels

2400 allocated by 40 groups of 60 channels (in specific frequency range), quickly selectable with dedicated buttons


Switching window

Up to 232 MHz, depending on band

1   470 ÷ 640 MHz

2   566 ÷ 798 MHz

3   510 ÷ 698 MHz

T   794 ÷ 798 MHz (For Thailand Only)


Frequencies

Quartz PLL frequency synthesizer circuit (25 kHz step)


Frequency stability

± 2,5 ppm (in the rated temperature range)


Temperature range

-10 ÷ +55 °C


Max RF power

  • 10 mW (ERP) when low power is selected
  • 50 mW (ERP) when high power is selected


Spurious emissions

< 2 nW


Modulation

Wideband FM, with pre-emphasis


Nominal deviation

±40 kHz (Peak deviation = ±56 kHz)


Telemetry feature

MTB40S transmits also a digitally modulated sub-carrier, suitable for:

  • Tone-squelch operating
  • Remote battery monitoring
  • Optional PTT (push to talk) operation


AF input connection LEMO option

Configurable on ‘mic’ display menu in 5 options:

  • ‘2 wires’: gain selectable -40 ÷ +40 (-54 dBu ÷ +26 dBu peak), no bias voltage
  • ‘2 wires + bias’: gain selectable -20 ÷ +40 (-54 dBu ÷ + 6 dBu peak), 5.5 V on 4k7 bias supply
  • ‘3 wires: gain selectable -40 ÷ +40 (-54 dBu ÷ +26 dBu peak)
  • ‘2 wires & phantom’ gain selectable -40 ÷ +40 (-54 dBu ÷ +26 dBu peak),
  • ‘2 wires + bias & phantom’: gain selectable -20 ÷ +40,(-54 dBu ÷ + 6 dBu peak), 5.5 V on 4k7 bias supply


AF input level

80 dB adjustable range from -60 dBu (775 uV) to 26 dBu (15.5 V) at peak deviation (1 kHz), adjustable in 1 dB steps


Max. input level

+26 dBu (15.5 V) at clipping, +20 dBu (7.75 V) at nominal level


Noise-Reduction

ENR (Wisycom Extended-NR), with independent Attack- and Recovery-time, noise optimized

ENC (Wisycom Extended-NC), with independent Attack- and Recovery-time, voice optimized & with reduced pre-emphasys


AF bandwidth

45 Hz - 21 KHz (3dB)

55 Hz - 20 KHz (1dB)


Distortion

< 0.3 % (0.15 % typ.)


Signal-to-noise ratio

  • typ. 115 dB (A)rms with 40 kHz deviation
  • typ. 121 dB (A)rms with 56 kHz deviation


Led

RGB Led indication (red, green and blue):

  • Wireless transmission status Green when RF transmission power is on, Red when RF transmission power is off. Blue when the input signal is above the peak threshold
  • Modulation peak (if activated & limiter disabled): RED
  • Battery lifetime status: GREEN - steady (> 25%) - slowly blinking (< 25%) - quickly blinking (<12%)
  • Ptt status: RED if active


Display

High contrast OLED (Organic light-emitting diode) white display (128 x 32 pixels)

8 step battery lifetime indication: 7 bars (100%-87%-75%-63-50%-38%-25%) and “empty bar” quickly blinking (12% remaining)


Power supply

2 AA size batteries (Alkaline, rechargeable NiMH or Lithium)


Dimensions

124 x 40 x 34 mm (Height-Width-Depth)


Weight

Approx. 210 g. without batteries (250g with batt)



Variants


MTB40S-EU-Bx-PV

Europe max power 50mW,

band x (1=470-640MHz, 2=566-798MHz, 3=510-698MHz),

ceramic coating


MTB40S-EUX-Bx-PV

Europe max power 100mW,

band x (1=470-640MHz, 2=566-798MHz, 3=510-698MHz),

ceramic coating


MTB40S-US-Bx-PV

USA & Canada power profile (max 50mW, USA freq. range 470-608 & 614-698MHz),

band x (1=470-640MHz, 3=510-698MHz),

ceramic coating


MTB40S-USX-Bx-P

USA & Canada max power profile (max 100mW, USA freq. range 470-608 & 614-698MHz),

band x (1=470-640MHz, 3=510-698MHz),

ceramic coating


MTB40S-AU-B3-PV

Australia power profile (max 100mW, AU freq. range 520-694MHz),

band 3=510-698MHz,

ceramic coating


MTB40S-CN-Bx-PV

China power profile (max 50mW, 470-510 & 630-787MHz),

band x (1=470-640MHz, 2=566-798MHz),

ceramic coating



Accessories

 

UPKmini

Infrared programming kit

Extremely small and light (interface + software) USB interface





UPK300E

Infrared programming kit

(interface + software) USB interface





 

 

Nordic Pro Audio ApS    |    Bjerringbrovej 143    |    DK-2610 Rødovre    |    CVR  36  97  50  32    |    info @ nordicproaudio.com    |    + 45 - 31 20 70 21