ชุดไมค์ประชุมไร้สายระบบดิจิตอล ยี่ห้อ TOA รุ่น TS-921 

The TS-921 is a Chairman unit of the Infrared Conference system. Since the system is cordless, it can be easily installed and removed. The Chairman unit features a priority speech key which allows it to take precedence over the TS-922 Delegate units when speaking. It can be operated on either the AD-0910 AC adapter or the BP-900A lithium-ion battery. It is equipped with a remaining battery indicator. Two types of dedicated microphones are made available for the TS-921 as optional products: the TS-923, TS-903 standard type and the TS-924, TS-904 long type

Specification

• Power Source : 7.2 V DC (supplied from optional lithium-ion battery)
• Current Consumption : Max. 390 mA

Infrared Emitter/Detector

• Wavelength : 870 nm (AM: Brightness modulation)
• Modulation Method : Frequency modulation
• Carrier Frequency : Transmission: Audio channel 1: 7.35 MHz
  • • Audio channel 2: 8.10 MHz
    • Audio channel 3: 8.55 MHz
    • Audio channel 4: 9.15 MHz
    • Control channel: 6.45 MHz
    • Reception: Base language channel: 1.95 MHz
    • Translation language channel: 2.25 MHz
• Input : Microphone terminal: XLR-4-31 type
• Output : Monitor speaker: 8 Ω , Headphone: φ3.5 mm mini Jack (3P:monaural) × 2
• LED Indicator : Speech indicator
• Function : Monitor volume control
• Battery Life : Approx. 10 hours
• Finish : Case: PC resin, Speaker net: black