The TS-820 is a Central Unit of the Infrared Conference System that allows easy installation and flexible layout. By connecting TS-905/907 IR Transmitter/Receiver, TS-820 can control the Chairman and Delegate Units via a wireless infrared signal.
It features the installation confirmation function that allows the connection status of the IR Transmitter/Receiver and Chairman/Delegate Units to be verified. The TS-820 is also equipped with FBS (Feedback Suppression), enabling effective control of acoustic feedback.
The system can be controlled by a PC (*1). With the use of an optional rack mounting bracket, it can be mounted in an EIA Standard equipment rack (4 unit size).(*1) Relevant control software is supplied on a custom-made basis.

TS 820 (Without Recording System)
| Power Source | 100 – 240 V AC, 50/60 Hz (use of the supplied AC adapter) |
|---|---|
| Power Consumption | 72 W |
| Current Consumption | Max. 3 A DC (when 24 V DC is supplied from the accessory AC adapter) |
| Carrier Frequency | Reception: 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 Transmission: Audio channel: 1.95 MHz |
| Input | MIC: -60 dB (*2) , 600 Ω, unbalanced, φ6.3 mm phone jack (2P) AUX: -20 dB (*2) , 10 kΩ, unbalanced, φ6.3 mm phone jack (2P) |
| Output | LINE: -10 dB (*2), 10 kΩ, unbalanced, φ6.3 mm phone jack (2P) REC: -10 dB (*2), 10 kΩ, unbalanced, RCA pin jack HEADPHONES: φ3.5 mm mini-jack (3P: monaural)” |
| Equalizer Input/Output | Input: -20 dB (*2), 10 kΩ, unbalanced, RCA pin jack Output: -20 dB (*2), 10 kΩ, unbalanced, RCA pin jack |
| Number of ConnectableChairman/Delegate Units | 64 units |
| Number of Connectable Infrared Transmitter/Receiver Units | Up to 4 units (with the use of distributor, up to 16 units connectable when they are all TS-905, and up to 12 units when they are all TS-907, or TS-905 and TS-907 are used in combination) |
| Infrared Transmitter/Receiver I/O Terminal | BNC jacks |
| External Control Connection Terminal | D-sub connector (9P, male)/USB-B selectable |
| LED Indicator | The audio signal receiving indicators 1 – 4 CH, Data signal receiving indicator, External control priority indicator, External control communication indicator, Battery indicator (flashes when a Chairman/Delegate unit’s battery nears complete discharge), Short-circuit indicator |
| Function Switch | Number of open microphones setting switch: 1/2/3/4 Mic-off setting switch: TIME OUT ON/OFF Speech priority selector switch: FIRST (First-in-first-out priority) LATEST (Last-in-first-out priority) FIRST: FIXED NEXT: LATEST (Priority fixed for the first unit, and last-in-first-out priority for all other subsequent units.) FBS switch: AUTO/OFF/EXT |
| Operating Temperature | 0 ℃ to +40 ℃ (32 ゜F to 104 ゜F) |
| Operating Humidity | 90 %RH or less (no condensation) |
| Finish | Panel: Surface-treated steel plate, black, 30 % gloss, paint |
| Weight | 2.7 kg (5.95 lb) |
| Accessory | AC adapter (Cord length: 1.8 m (5.91 ft) DC cord, and 2 m (6.56 ft) detachable AC cord)(*3) …1 |
| Option | Rack mounting bracket: MB-TS920 |
(*2) 0 dB = 1 V(*3) Not supplied with the TS-820(-CN). For the usable power supply cord and AC adapter, contact your nearest TOA dealer.