Observing international communications manufacturers, now for the Chinese market 230M-band data transmission radio foreign companies are: American MDS Inc. (2710/EL705, about 2,000 units / year), New Zealand down TAIT's (TM8015/8110/8115, about 3000 units / year), Japan Nissei (ND889A/886A/250A, about 20,000 / year), Australia SPECTRA company (MD9220, about 1000 units / year), etc. In addition, the Chinese market even earlier as well as Japan's Kenwood , Hitachi, CONPRO, KYODO, SEIKI MOTOROLA and the United States and Canada, the first record, and other manufacturers at different times produced 230M-band analog FM radio, they Nissei ND88X series, like radio, are subject to MODEM to transfer data, now largely discontinued the. Overall, MDS, TAIT and SPECTRA are using the DSP digital radio performance is good, high costs and low market share, while Japan's fine with the early Japanese radio station, is to be outside with a MODEM (the ATMEL microcontroller , CML FSK chip, etc.) of the analog FM radio, poor performance, low cost and high market share (mainly electricity load control, a large number of users).
Shenzhen Sinosun in the digestion and absorption of foreign advanced products based on the combined characteristics of the application in various fields, relying on the strength of domestic famous universities and research institutes to launch its own brand of digital radio, higher performance, cheaper.
|
Part of the overall |
MDS2710 |
ND889A |
WDS2710 |
|
Manufacturers |
MDS Inc. USA |
Japan Nissei with Jiaxing Blue Wave MODEM |
Shenzhen Sinosun |
|
Design ideas |
Digital radio with DSP |
Analog FM radio plus built-in domestic MODEM |
Digital radio with DSP |
|
Transmission distance |
Open terrain 30 km |
Faraway |
Open terrain 50 km |
|
Relay mode |
P70 repeater station via one or more levels to achieve real-time relay |
Real-time relay |
P70 repeater station via one or more levels to achieve real-time relay |
|
Hot standby mode |
P20 achieved through hot standby master station |
NO |
P20 achieved through hot standby master station |
|
Programming instructions and data transceiver fault indication |
TXD, RXD, DCD and alarm indication |
YES |
TXD, RXD, DCD and alarm indication |
|
Channels |
1 |
16 |
16 |
|
Power-saving mode |
Sleep mode |
YES |
Sleep mode |
|
Write frequency mode |
Win95/98/2000 Software |
Win95/98 Software |
Win95/98/2000 Software |
|
Power On Self Test time |
About 1s |
Short |
About 1s |
|
Production process |
6-layer circuit boards, full patch, users do not need to adjust |
The most advanced highly integrated multi-layer circuit boards, only one board machine, maintenance is very easy to debug, the user can debug |
6-layer circuit boards, full patch, users do not need to adjust |
|
Structure |
Aluminum die casting body |
Aluminum die casting body |
Aluminum die casting body |
|
Ease of installation |
With mounting ears |
In engineering mount |
With mounting ears |
|
Antenna socket |
Standard Block L16 |
With soft lines SL16K type socket, easy installation and reliable |
Standard Block L16 |
|
Waterproof apron |
NO |
YES |
NO |
|
Thermal characteristics |
5W 24-hour continuous emission |
Good, long launch |
5W 24-hour continuous emission |
|
Volume |
184×143×51mm |
137×135×44mm |
184×143×51mm |
|
Temperature range |
-40℃～+70℃ |
-40℃～+60℃ |
-40℃～+70℃ |
|
Product Features |
MDS2710 |
ND889A |
WDS2710 |
|
D / A,switching |
YES |
YES |
YES |
|
Original function call |
NO |
YES |
Free microphone for speech |
|
Received field strength, output power, supply voltage, temperature and other instructions |
Exist,you can dynamically understand the working status of the radio
|
NO |
Exist,you can dynamically understand the working status of the radio |
|
Power, output signals to adjust the parameters |
Can be local or remote air settings |
Programmable, easy |
Can be local or remote air settings |
|
Network management functions |
Yes, you can set the radio parameters of the wireless remote |
NO |
Yes, you can set the radio parameters of the wireless remote |
|
Error statistics |
Yes,you can dynamically understand the radio transmission |
NO |
Yes,you can dynamically understand the radio transmission |
|
Field strength meter function |
There can be measured reception field strength |
NO |
There can be measured reception field strength |
|
Power meter function |
Yes, you can output the measured radio |
NO |
Yes, you can output the measured radio |
|
Voltage out of range, the temperature is too high, the data interface parameters such as alarm notification error |
There can be accurately analyzed using the wrong radio station to understand |
NO |
There can be accurately analyzed using the wrong radio station to understand |
|
Software upgrade |
There are various functions can be upgraded versions of the software update |
NO |
There are various functions can be upgraded versions of the software update |
|
Performance data |
MDS2710 |
ND889A |
WDS2710 |
|
Data interface |
RS232 port (DB-25) Interface |
By the built-in MODEM, as needed to provide RS232/RS485 / TTL (DB-9) Interface |
RS232(DB-25)RS485/TTL Interface |
|
Air transfer rate |
9600/19200bps |
Typically 2400 bps, there is 4800,9600 bps MODEM available |
9600/19200bps |
|
Interface rate |
300~38400bps |
1200~9600bps |
300~38400bps |
|
Transfer byte length |
Transparent dynamic adaptive |
Transparent unlimited |
Transparent dynamic adaptive |
|
BER |
10-6@-110dBm |
MODEM is a plus because, without the index |
10-6@-110dBm |
|
Original built-in MODEM |
Digital radio, without the need for digital-analog conversion MODEM |
There are a variety of options and compatibility |
Digital radio, without the need for digital-analog conversion MODEM |
|
Transceiver conversion time |
＜7ms |
＜100ms |
＜7ms |
|
TRANSMITTER |
MDS2710 |
ND889A |
WDS2710 |
|
Modulation |
CPFSK |
FM |
CPFSK |
|
Output Power |
5W |
25W |
25W |
|
Start firing |
DATA KEY / Transparent |
Radio PTT / CTS, RTS handshake |
DATA KEY / Transparent |
|
Launching start-up time |
＜3ms |
40ms |
＜3ms |
|
Frequency stability |
±1.5PPM |
±1.5PPM |
±1.5PPM |
|
RECEIVER |
MDS2710 |
ND889A |
WDS2710 |
|
Sensitivity |
-110dBm@10-6BER |
0.25μv(12dB SINAD) |
-110dBm@10-6BER |
|
Audio frequency response characteristics of the interface |
Digital audio input and output |
Programmable pre-emphasis and de-emphasis, in line with data transmission requirements MODEM |
Digital audio input and output
|
|
Current waiting |
150mA (receiver) / 18mA (sleep) |
55mA |
150mA (receiver) / 18mA (sleep) |
|
Products and services |
MDS2710 |
ND889A |
WDS2710 |
|
After-sales service and technical support |
One year free agents to provide technical support through the U.S. |
GOOD |
Full lifetime warranty and free technical support |
|
Price |
About 6500 |
Low |
About 4500 |
|
Bulk supply cycle |
4 weeks |
Short (usually cash) |
Spot |
The information of U.S. MDS2710 Radio from MDS website（http://www.microwavedata.com）
The information of Japan Nissei ND889A radio from Japan Nissei website（http://www.nissei-denshi.co.jp）and Jiaxing Blue Wave（http://www.rec198.com）
The information of Shenzhen Sinosun radio from Sinosun website（http://www.sinosun.cn）
