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DM640 is a new generation of smart grid communication solutions in a module integration of micro power wireless and multi frequency power line carrier, each independent channels are achieved with the mainstream product interoperability.DM640 chipsets support three sets of independent clock system can establish two completely independent of BFSK and (or) BPSK channel and a.DM640 wireless channel carrier to support wireless channel carrier to carrier channel protocol forwarding, with strong communication reliability of the.DM640 system combines the advantages of the current mainstream communication scheme, the smart grid network to help clients build industry-leading 。
 
DM640 carrier channel characteristics
modulation methods
BFSK/BPSK
central frequency
60~500KHZ
bandwidth
15KHZ
The length of spread spectrum sequence
15/40/63 bit
communication method
half-duplex
Bit rate  
7.5/10/20.8KBps
Data rate
50~5000Bps
Relay depth
Class 15
PSK DM640 channel characteristics:
1) using 15bit direct sequence spread spectrum, anti interference performance is good
2) hardware related synchronization mechanism, clock synchronization precision and stability
3) support a variety of frequency switching, more real
4) support address compression, high communication efficiency
5) support forward error correction code to ensure the reliability of the communication
6) with received signal strength indication RSSI
7) using centralized routing, and has the function of automatically reporting table number
8) support hardware phase identification function
9) with the signal level control function, reduce the power grid noise
DM640 FSK channel features:
1) FSK hardware coherent demodulation technology, high sensitivity
2) with the hardware sampling of the code matching function, clock synchronization accuracy and stability
3) support address compression, high communication efficiency
4) support for automatic acquisition of address and short address settings
5) with received signal strength indication RSSI
6) using centralized routing, and has the function of automatically reporting table number
7) support hardware phase identification function
8) with the signal level control function, reduce the power grid noise
DM640 wireless channel characteristics:
1) RF frequency: 470MHZ ~ 510MHZ
2) debug mode: GFSK
3) receiving sensitivity: -123dBm@1Kbps
4) frequency interval: 100KHZ
5) air speed: 2400BPS
6) transmission maximum length: 256Byte
7) transmit power: <17dBm
8) receiving current: 17.2mA@3.3V
9) send current: <68mA