TOA Electronics TS-821 Chairman Unit for Infrared Conference System

The TS-821 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-822 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-821 as optional products: the TS-923, TS-903 standard type and the TS-924, TS-904 long type.

Technical Specifications

Power Source
7.2 V DC (supplied from optional lithium-ion battery)
9 V DC (supplied from optional AC adapter)
Current Consumption
Max. 390 mA
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
Audio channel
1.95 MHz
Covering Range
7 m (22.97 ft) radius
Input
Microphone terminal: XLR-4-31 type
Output Monitor speaker: 8 , 0.2 W
Headphone: 3.5 mm mini Jack (3P:monaural) - 2
LED Indicator
Speech indicator, Power indicator
Function
Monitor volume control, Headphone volume control, Priority speech function
Battery Life
Approx. 10 hours
Operating Humidity
90 %RH or less (no condensation)
Finish
Case: PC resin, black
Speaker Net: Black, matte finish, paint
Dimensions
205.7 (W) 70.3 (H) - 164.2 (D) mm (8.1" - 2.77" - 6.46")
Weight
525 g (1.16 lb)