MTB40S



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

It benefits of the LINEAR feature @20L power setting: allows EVENLY SPACED frequency allocation intermodulation free

Example for 1 DVBT (8 MHz)

• 250KHz space -> 33 Mic (narrowband option)
• 350kHz space -> 23 Mic (wideband)

FEATURES

• Up to 232 MHz bandwidth in 470/1160MHz range
• Dual power amplifier & phase canceling configuration for intermodulation free operation
• Wideband and Narrowband options available
• 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
• Intermodulation free allows EQUALLY SPACES frequency allocation
• 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 or Lithium

Frequency ranges	B7 option: 470 ÷ 663 MHz B3 option: 510 ÷ 698 MHz B2 option: 566 ÷ 798 MHz BP option: 806 ÷ 810 MHz B8 option: 940 ÷ 960 MHz B6 option: 960 ÷ 1160 MHz
Switchable channels	2400 managed in 40 groups ofr 60 frequencies completely user customizable
Switching-window	Up to 232 MHz, depending on band (see Variants below)
Frequencies	Quartz PLL frequency synthesizer circuit (25 kHz step)
Frequency error	± 2.5 ppm, in the rated temperature range
RF Power	switchable typ. 20 mW/ 20L mW / 50 mW /100 mW note: in some countries high power can be disabled, for local norm!
Modulation	wideband FM, with pre-emphasis (Narrowband on request)
Nominal deviation	±40 kHz Wideband (±25 kHz Narrowband option)
Peak deviation	±56 kHz Wideband (±35 kHz Narrowband option)
Spurious emissions	< 2 nW
Telemetry feature	TX transmits also a digitally modulated sub-carrier, suitable for:  tone-squelch operating remote battery monitoring optional PTT (push to talk) operation
Noise Reduction system	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) Wideband with LPF at 20KHz 45 Hz ÷ 17 KHz (3dB), 55 Hz ÷ 15 KHz (1dB) Narrowband with LPF at 15kHz
Distortion	< 0.3 % (0.15 % typ.)
SND/D ratio (Analogue)	45 Hz ÷ 21 KHz (3dB), 55 Hz ÷ 20 KHz (1dB) Wideband with LPF at 20KHz 45 Hz ÷ 17 KHz (3dB), 55 Hz ÷ 15 KHz (1dB) Narrowband with LPF at 15kHz
Audio input connector	XLR-3F (transformer isolated) with locking collar and 48V phantom power
Audio input level	from -54 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
Managing interface	IrDA
LED	RGB led indication with (red, green and blue):  Wireless transmission status: GREEN on/RED off Battery lifetime status: GREEN steady (> 25%), slowly blinking (< 25%), quickly blinking (<12%) Modulation peek (if activated & the limiter is disabled): RED Limiter into action: Blue
Battery lifetime indication	8 steps : 7 bars (100%-87%-75%-63-50%-38%-25%) and “empty bar” quickly blinking (12% remaining)
Display	High contrast OLED white display (128 x 32 pixels)
Power supply	2 AA size cell (Alkaline, rechargeable NiMH or Lithium)– Phantom Power to Mic (max 4 mA)
Temperature range	-10 ÷ +55 °C
Dimensions	124 x 40 x 34 mm (Height-Width-Depth)
Weight	Approx. 210 g. without batteries (250g with batt)