WisyCom MTB40 - Technical Specifications

MTB40 User Manual
16
TECHNICAL SPECIFICATIONS
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 (see Variants on the next page)
Frequencies
Quartz PLL frequency synthesizer circuit (25 kHz step)
Frequency stability
▪ ± 2,5 ppm (in the rated temperature range)
Temp. range
-10 ÷ +55 °C
Max RF power
▪ 10mW (ERP) (to respect some local norm)
▪ 50 mW (ERP) (note: in some countries middle power can be disabled, for local norm!)
Spurious emissions
< 2 nW
Modulation
wideband FM, with 50 µs pre-emphasis
Nominal deviation
±40 kHz (Peak deviation = ±56 kHz)
Telemetry feature
MTB40 transmits also a digitally modulated sub-carrier, suitable for:
▪tone-squelch operating
▪ remote battery monitoring
▪ optional PTT (Push to talk) operation
AF input connector
XLR-3F (transformer isolated) with 48V phantom power
AF input level
80 dB adjustable range 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
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-emphasis
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
Display
High contrast OLED (Organic light-emitting diode) bicolor display (96 x 36 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) – Phantom power to MIC
(max 4mA)