Wireless microphone system for railways type B

Wireless microphone system for railways type B

Features

  • Since using a digital modulation system, this type enables multi-channel (15-ch) operation, which cannot be achieved by analog modulation.
  • It uses a down converter system from the antenna to the receiver.
  • Cables for conventional C-type wireless systems can be reused as they are.
  • It also has control switches that can be used for not only broadcast but remote control of facilities, supporting rail station operations.
  • Since it is fully digital, it offers high confidentiality, making it possible to prevent improper use with microphones other than those that are assigned an ID.

Wireless microphone WTH-8120A

Features

  • Low noise thanks to a synthesizer/compander system
  • Capable of using up to 15 frequencies thanks to a digital modulation system
  • Small, lightweight, easy-to-handle body
  • Capable of not only broadcasting, but remote control of up to 2 targets, and switching between 4 frequencies
  • Offering high confidentiality because of being fully digital, preventing improper use of microphones by means of ID assignment

Specifications

Transmission frequency One frequency from 30 channels between 806.125 and 809.750 MHz
Types of radio wave G1D/G1E
Oscillation method Crystal-controlled PLL synthesizer system
Transmission output 5 mW/1 mW (switching system)
Microphone unit Omnidirectional electret condenser microphone
Antenna Incorporated in the main body
Frequency characteristics 100 Hz to 7 kHz
Number of targets controlled 2
Channel switching 4 channels
Power supply AAA nickel metal hydride rechargeable battery 1.2 V × 2 750 mA
Operating time 8 consecutive hours (during intermittent operation with transmission : wait = 1 : 4)
Environment -10 to +50°C (No condensation) *Note that the temperature characteristics of batteries are not included
Waterproof standard Compliant with the IPX4 rating
Mass Approx. 177 g (WTH-8120A) *The mass of straps is not included

Wireless receiver WRU-8100A

Features

  • Allowing low-noise multi-channel operation, thanks to the use of the 800 MHz band and a synthesizer/digital system, and making it easy to change the frequency
  • Space diversity reception system that causes few sound dropouts, reducing dead points
  • Withstanding interference thanks to the combined use of a tone squelch and a carrier squelch, shutting out noise during wait for reception
  • Displaying the antenna input system that is during reception, using the A and B indicators

Specifications

Reception frequency One frequency from 30 channels between 318.200 and 321.825 MHz
Reception circuit system Diversity double super heterodyne system
Reception sensitivity 20 dBμVEMF or less (bit error rate: 10-5)
S/N 60dB or more (when press-to-talk microphone WTH-8100 series audio input level is -36 dBm)
Output level -20/0 dBm (switching system, press-to-talk microphone WTH-8100 series audio)
Input level (at -36 dBm)
Frequency characteristics 100 Hz to 7 kHz (with a bass/treble adjustment function)
Remote output Output by a photocoupler (common) × 6
Power supply DC12 V (Supplied by WOL-8110)
Environment -10 to +50°C (No condensation)
Mass Approx. 135g

Storage rack WOL-8110

Features

  • Capable of storing up to 4 receivers
  • Capable of being mounted on an EIA rack (1U) or JIS rack (1J)

Specifications

Antenna input A system × 2, B system × 2 (BNC-J, 75Ω)
Output level -20/-50dBm
Power supply AC100V 50/60Hz
Environment -10 to +50°C (No condensation)
Mass Approx. 4.0 kg (not including the receiver WRU-8120)

Antenna divider WDL-8100

Features

  • 8 antenna inputs and 4 branch outputs
  • Eliminating internal loss resulting from mixing or distribution, thanks to a built-in booster amplifier, fully bringing out the performance of the receiver.
  • Capable of being mounted on an EIA rack (1U) or JIS rack (1J)

Specifications

Antenna input A system/B system × 4 (each) (BNC-J, 75Ω)
Antenna output A system/B system × 2 (each) (BNC-J, 75Ω)
Passband 318.200 to 321.825 MHz
Gain +3.5 dB (0 dB during the use of WOL-8110)
Power supply AC100V 50/60Hz
Superimposed power supply DC +12 V (antenna input pin)
Environment -10 to +50°C (No condensation)
Mass Approx. 4.2 kg
*Since a down convert system is used, an antenna divider is required on a system.
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