1. Fully Digital Integrated PLC ( DT340/DT220 )
The fully digital PLC system integrates TDM, modulation, de-modulation, voice signal compression encoding, network management, echo cancellation for both voice and data transmitting. This product is specifically designed for the electric power system. It supports the dedicated communication frequency band which is 40 KHz ~ 500 KHz. The customer can set the receiving and transmitting frequencies at will ( They could be either the same, adjacent to or isolated from each other). The general transmission rate is 39.6 Kbit/s Within the 4KHz bandwidth, The data signal transmission rate is between 300bit/s ~ 19.2Kbit/s and is.configurable. This product also has network management and central control functions.
A. Features
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Maximum transmission rate: 39.6 Kbit/s
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Integrated Multiplexing & Modulating
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Self-Adaptive equalization, supporting random setting of interval between receiving and transmitting frequencies
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Multiple voice & data channels
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Perfect monitoring, control, configuration and alarm management systems
B. Technical specification
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Programable carrier frequency range: 40Khz—500Khz
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Channel bandwidth: 4KHz
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Transmission rate: 10.8 Kbit/s ~ 39.6Kbit/s
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Minimum SNR: 16 dB (for transmission rate at 10.8 Kbps)
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Transmission capacity: 2 voice channels and 2 data channels
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Peak Envelope Power: 10W/+40dBm, 20W/+43dBm, 40W/+46dBm
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Automatic gain control range: No lower than 50 dB
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Allowed maximum line attenuation(without AWGN): 80 dB
2. Digital Co-Frequency PLC ( DT2006/DT2008 )
By innovatively appling the digital/analog echo cancellation technology to the Integrated Fully Digital PLC system, YESTUNED overcomes the technology barrier which has bothered the industry for years and makes the receiving & transmission on the same frequency come true. As a result, the Digital Co-Frequency PLC system doubles the communication frequency.
A. Features
- Maximum transmission rate: 21.6 Kbit/s
- Valid transmission band 4KHz shared by both receiving and transmitting.
- Self-Adaptive echo cancellation, ensuring stable transmission for co-frequency receiving/transmitting
- Multiple voice/data channels
- Multi-function user interface terminal
- Perfect monitoring, control, configuration and alarm management systems
B. Technical specification:
- Programmable carrier frequency range: 40KHz—500KHz
- Frequency configuration: Compliant with IEC standard; compatible with existing devices
- Channel bandwidth: 4KHz shared by both receiving & transmitting
- Transmission rate: 10.8 Kbps ~ 21.6 Kbps
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Minimum SNR: 16 dB (for transmission rate of 10.8 Kbps)
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Transmission capacity: 2 voice channels and 2 data channels
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Peak Envelope Power: 10W/+40dBm, 20W/+43dBm, 40W/+46dBm
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Automatic gain control range: No lower than 50 dB
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Allowed maximum line attenuation(without AWGN): 50 dB
3. Image Monitoring PLC ( DT110 )
The DT110 graphic monitor PLC system transmits digital video signal, voice and remote control signals through electric power line. It integrated video monitoring, security & protection and remote control functions and was designed for unattended transformer substation, major devices and equipment room,. It is the only reasonable and effective solution for those unattended transformer substation without optical fibre approach.
A. Features
- Integrated video compression&transmission, remote control and security & protection
- Unique CAMEC-I hardware video compression/transmission, software receiving/de-compression
- 4 video input channels
- High-quality inter-frame video compression encoding technology
- Remote control over multi-channel holder, cameras and video matrix host
- Multi-channel alarms processing
- Multi-channel independent remote control
- Multi-point monitoring and inter-communication
B. Technical specification:
- Carrier frequency range: 40KHz—500KHz
- Frequency configuration: Compliance with IEC standard; compatible with existing devices
- Channel bandwidth: 4 KHz
- Video input: 4 channels (color/black&white ,CVBS, PAL/NTSC)
- Resolution: Support CIF/QVGA/QCIF format, 352×288/320×240/176×144
- Receiver configuration: Windows 95/98/NT/2000; above P500/32MB(no additional hardware is needed)
- Concurrent connections with multiple sites, single or simultaneously multiple pictures display, unlimited zoom-in/out
- 2 alarm input channels and 4 remote control output channels.
- 4 monitoring channels and 4 talk –back channels, independently controlled.
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Peak Envelope Power: 10W/+40dBm, 20W/+43dBm, 40W/+46dBm
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Automatic gain control range: No lower than 50 dB
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Allowed maximum line attenuation(without AWGN): 80 dB
4. LAN-based Digital PLC ( DT220-L )
The DT220-L digital PLC system has and IEEE 802.3 compliant Ethernet interface and support TCP/IP protocol. DT220-L work in pairs at each end of the transmision line and work as a communication gateway which connect the substation computers to the upper level monitoring station network. It is specifically designed for the substation where the Optical Fibre is not available.
A. Features
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Overcome the distance limistation of Ethernet by using the power line as a remote access channel
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Make the Power Digital management reach to the former "isolated spot" ;
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Creat an internal information & resource wholely shared platform
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Improve the data processing speed and efficiency
B. Technical specification
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Programable carrier frequency range: 40Khz—500Khz
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Circuit configuration: copliance with IEC standard, compatible with current equipments
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Channel bandwidth: 4KHz
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LAN interface transmission rate: 10MHz
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Networking standard: compliance with IEEE 802.3, 10BASE-T Ethernet standard
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Networking protocol: CSMA/CD
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Peak Envelope Power: 10W/+40dBm, 20W/+43dBm, 40W/+46dBm
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Automatic gain control range: No lower than 50 dB
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Allowed maximum line attenuation(without AWGN): 80 dB
5. Substation Image Monitoring System ( VS-1 )
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Core Technologies
1. Integrated power line carrier system (Self Owned Patent)
This innovative design integrated multiple current advanced digital technologies. Constructed on the 1 million-gate CPLD (Complex Programmable Logic Device) hardware platform, the new system simultaneously implement Time Division Multiplexing (TDM) ,Time Division D-multiplexing, MQAM Modulation, MQAM De-modulation and Echo cancellation for 4 ~ 6 channels of both voice and data signals. As a result, it largely improves the transmission rate and saves the hardware resources.
2. Self-Adaptive echo cancellation technology
The digital/analog echo cancellation technology dramatically eliminates the frequency configuration defect associated with the current PLC technology. By counteracting the useless signal from the hybrid signal with high peak power voltage, it accomplishes that full-duplex receiving and transmitting on the same frequency (this function has been discussed in the field for years but was limited by the current technologies). Thereby it doubles the currently in-use carrier communication frequency and raises the value of power lines communications.
3. 4KHz high-speed data transmission technology
YESTUNED's specialized MQAM high-efficiency modulation/demodulation technology makes the high spead Peer Full-Duplex transmission on any valid 4 KHz band within 40 KHz ~ 500 KHz. The maximum transmission speed reaches 39.6 Kbps which is higher than the V.34 International Standard which is 33.6 Kbps on parametric stabilization channel.
4. Central Monitoring and Network Management System (NMS)
DT series fully digital PLC system has multi communication interfaces which support the applications of central monitoring and MNS to those multiple combined networking cases. Through the NMS, the customer can monitor and manage up to 256 fully digital PLCs simultaneously. The NMS not only helps reducing the personnel cost but also improves the speed of Fast Response, Thereby it makes the entire power system's security , stability and reliability Guaranteed.
5. MOS power amplifier
By using the lnsulated gate fieldeffect as power amplifier component and complementary source gate as output, the fully digital PLC system dramatically reduces the signal loss & distortion which is transmitted at 40KHz~500KHz. As a result, the system’s overall performance markedly surpasses that of the traditional PLC in which the bi-polar junction transistor power amplifier is used.. YESTUNED is the only company that can successfully use this technology.
