Technical Specifications - WisyCom MTH400 User Manual

Switchable channels
Switching window
Frequencies
Frequency stability
Temperature range
Max RF power
Spurious emissions
Modulation
Nominal deviation
Telemetry feature
AF input connection
AF input level
Max. input level
Max sound pressure
Noise-Reduction
AF bandwidth
Distortion
Signal-to-noise ratio
Led
Display
Power supply
Battery life (alkaline)
Dimensions
Weight
Note: The above technical specifications refer to the MTH 400 "transmitter" section. The acoustic specs are relevant to
the microphone-head used. The MTH 400 transmitter complies with ETS 300 422.
MTH400 User Manual

TECHNICAL SPECIFICATIONS

2400 allocated by 40 groups of 60 channels (in specific frequency range),
quickly selectable with dedicated buttons
Up to 232 MHz, depending on band (see below code table)
Quartz PLL frequency synthesizer circuit (25 kHz step)
▪ ± 2,5 ppm (in the rated temperature range)
-10 ÷ +55 °C
▪ 50 mW (ERP) when high power selected (note: In some countries high
power can be disabled, for local norm!)
▪ 10 mW (ERP) when low power selected (to respect some local norm)
< 2 nW
wideband FM, with 10 µs pre-emphasis
±40 kHz (Peak deviation = ±56 kHz)
MTH400 transmits also a digitally modulated sub-carrier, suitable for:
▪ tone-squelch
operating
Directly interchangeable microphone-heads
-60 ÷ +0 dBu nominal, quickly settable by steps of 1 dB with dedicated
buttons
+6 dBu
150 dB SPL (0,5% THD), with
MCM301/MCM302/MCM303/MCM304/MCM305 condenser-heads
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
45 Hz ÷ 21 KHz (3dB)
55 Hz ÷ 20 KHz (1dB)
< 0.3 % (0.15 % typ.)
typ. 115 dB (A) with 40kHz deviation
rms
typ. 121 dB (A) with 56kHz deviation
rms
Led indication with bicolor led (red & green) on wireless power switch:
▪ Wireless transmission status: GREEN on/off
▪ Modulation peek (if activated): RED
▪ Battery lifetime status: GREEN
- steady (> 25%) - slowly blinking (< 25%) - quickly blinking (<12%)
▪ Ptt status: RED if active
High contrast OLED (Organic light-emitting diode) 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)
2 AA size cell (Alkaline, rechargeable NiMH)
approx. 11 hours @ 50mW continuous working; up to 14 hours @ 10mW
 body max. diameter 33 mm (without microphone-head)
 total length 183 mm (without microphone-head)
Approx. 300g, including battery and MCM3xx (condenser) mic-head ( approx.
260g batteries excluded)
▪ remote battery ▪ optional PTT (push
monitoring to talk) operation
Rev.04
15