DCS-990M is a fully digital conference central control unit, which centralized processing and control discussion, Clear sound, hi-fidelity, built in USB port for recording in MP3 format and Support up to 64GB drive. built-in telephone coupler input/output, Built-in Digital automatic feedback suppression, Built-in Video switcher processor 4IN/2OUT for SD video camera, Support control HD video camera and SD video camera up to 4 unit, support up to 60 units, can be expanded to discussion up to 5,000 units.
DCS-990M Supports multiple meeting for:
Corporate meeting Rooms.
Government meeting room & City Council Meeting.
Education institutions.
Courtrooms.
Non-profit organizations.
VERIFICATION OF COMPLIANCE : 
FEATURES
- Fully digital conference system.
- Discussing and video-tracking combined conference system.
- Easy to control meeting mode and the number of speakers by the buttons on the panel.
- Large TFT LCD screen displays 240 x 128 dot matrix display conference mode working status.
- The microphone can open at same time: 1,2,3,4,5,6 and all microphone.
- The DCS-990M can support 60 microphone units. And can able to support microphone up to 5000 units by power extended machine.
- The electrical load and short circuit protection function.
- The power switch turn-on/off without silent noise.
- Equipped with audio parallel output and a 6.3 jack output, conference recording outputs and background music inputs interface.
- Built in USB port for recording with light indicator. (Maximum 64GB)
- Built-in telephone coupler input and output ports, can be used for a remote meeting.
- Built-in DAFS Function Digital automatic feedback suppression is controlled It can facility automatically eliminates acoustic feedback.
- RS232 interface can be achieved using computer software to control entire conference system function.
- Built-in Video switcher processor 4IN/2OUT for Standard Definition (SD) video camera.
- Support control High Definition (HD) video camera and Standard Definition (SD) video camera up to 4 unit.
- Support protocol camera control Pelco-D, Pelco-P and Visca.
- Seven operational microphone modes:
1. CHAIRMAN mode: Only chairman can speech.
2. FIFO mode: After reaching limit number (1-6) when open new delegate microphone the first microphones will close automatic.
3. LIFO mode: After reaching limit number (1-6) when open new delegate microphone the last delegate microphones will close automatic.
4. LIMIT mode: Limit microphones (1-6) can open on the same time.
5. FREE mode: All delegate microphones can open on the same time.
6. REQUEST mode: The all delegate microphone unit can be open after the chairman approve only.
7. TEST mode: Light-ring all delegate microphone in system will turn on for check all delegate microphone status is ready to used.
DIAGRAM
Specs
| Power Supply | AC 100 - 240V : 50Hz/60Hz |
| Max Power Consumption | 120W |
| Frequency response | 30Hz - 18kHz |
| Input impedance | LINE : 50KΩ DIN : 50KΩ |
| Output impedance | RECORD : 200Ω LINE : 200Ω |
| BALANCE : 300Ω UNBALANCE : 400Ω | |
| Signal to Noise Ratio | > 100dB @ 1KHz |
| Total Harmonic Distortion Ratio | < 1 % @ 1kHz |
| Operation temperature | -20°C ~ 70°C |
| Storage temperature | -30°C ~ 80°C |
| Color | Silver |
| Dimensions | 480x85x370 mm |
| Weight | 5.5 Kg |
| Set | 19 inches racks |
| Power Supply | DC 9V by Control unit |
| Power Consumption | 80mA |
| Interface Type | 8P-DIN |
| Earphone Output | 3.5mm stereo jack |
| Installation | Desktop |
| Input Impedance | 1 KΩ |
| Connection Mode | Daisy-Chain |
| Crosstalk Attenuation | >60 dB |
| Speaker Power | 2W |
| Microphone Type | Condenser |
| Polar pattern | Ultra-Cardioid |
| Frequency response | 40Hz - 18kHz |
| Signal-to-Noise Ratio | 68dB(A-Weight) |
| Sensitivity | -43 dBV/Pa |
| Length of Microphone | 480mm |
| Color | Silver |
| Dimensions | 125x173x71 mm |
| Weight | 0.75Kg |
| Power Supply | DC 9V by Control unit |
| Power Consumption | 80mA |
| Interface Type | 8P-DIN |
| Earphone Output | 3.5mm stereo jack |
| Installation | Desktop |
| Input Impedance | 1 KΩ |
| Connection Mode | Daisy-Chain |
| Crosstalk Attenuation | >60 dB |
| Speaker Power | 2W |
| Microphone Type | Condenser |
| Polar pattern | Ultra-Cardioid |
| Frequency response | 40Hz - 18kHz |
| Signal-to-Noise Ratio | 68dB(A-Weight) |
| Sensitivity | -43 dBV/Pa |
| Length of Microphone | 480mm |
| Color | Silver |
| Dimensions | 125x173x71 mm |
| Weight | 0.75Kg |
| Power Supply | DC 9V by Control unit |
| Power Consumption | 80mA |
| Interface Type | 8P-DIN |
| Earphone Output | 3.5mm stereo jack |
| Installation | Desktop |
| Input Impedance | 1 KΩ |
| Connection Mode | Daisy-Chain |
| Crosstalk Attenuation | >60 dB |
| Speaker Power | 2W |
| Microphone Type | Condenser |
| Polar pattern | Ultra-Cardioid |
| Frequency response | 40Hz - 18kHz |
| Signal-to-Noise Ratio | 68dB(A-Weight) |
| Sensitivity | -43 dBV/Pa |
| Length of Microphone | 480mm |
| Color | Silver |
| Dimensions | 125x173x71 mm |
| Weight | 0.75Kg |
| Power Supply | DC 9V by Control unit |
| Power Consumption | 80mA |
| Interface Type | 8P-DIN |
| Earphone Output | 3.5mm stereo jack |
| Installation | Desktop |
| Input Impedance | 1 KΩ |
| Connection Mode | Daisy-Chain |
| Crosstalk Attenuation | >60 dB |
| Speaker Power | 2W |
| Microphone Type | Condenser |
| Polar pattern | Ultra-Cardioid |
| Frequency response | 40Hz - 18kHz |
| Signal-to-Noise Ratio | 68dB(A-Weight) |
| Sensitivity | -43 dBV/Pa |
| Length of Microphone | 480mm |
| Color | Silver |
| Dimensions | 125x173x71 mm |
| Weight | 0.75Kg |
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