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No. | Item | Parameter | Note |
1 | Modulation mode | FSK | |
2 | Work frequency | 490MHZ | 160/230/315mhz is possible |
3 | Transmission power | 50mW | |
4 | Transmitting current | <40mA | |
5 | Receiving current | <35mA | |
6. | Sleeping current | <10uA | |
7 | Receiving sensitivity | -120dbm(1200bps) | |
8 | Channel amount | 8 channels | User setting |
9 | Working temperature | -20oC+85oC | oC |
10 | Working humidity | 10%~90%(relative humidity without condensation) | |
11 | Antenna impedance: | 50Ω | |
12 | Power supply | DC +5V±0.5V | |
13 | Dimension | 39.4mm×24mm×8mm | |
14 | Interface | TTL | |
15 | Reliable transmit distance | 500m |
Features:
1.Power and receiving sensitivity
The transmission power is <10mW, Receiving sensitivity: -120dbm,
Transmitting current<40mA, Receiving current<35mA, sleeping current <10uA.
2. Modulation mode and Frequency
Modulation mode: FSK, Frequency: 490mhz. Also capable of 160/230/315MHz.
3. High anti- interference and low BER(Bit error Rate)
Based on the FSK modulation mode, it adopts the efficient communication protocol. The actual bit error rate of 10-5 ~ 10-6 can be achieved when channel bit error rate is 10-2.
4. Long transmission distance
Within the range of visibility, the reliable distance is (BER=10-3/1200bps)>500m, (BER=10-3/1200bps)>800m when the antenna height is greater than 2m .
5. Transparent data transmission
Transparent data interface is offered to suit any standard or nonstandard user protocol. Any false data generated in the air can be filtrated automatically (What has been received is exactly what has been transmitted). The change time between receiving and sending is <10ms.
6. Multi- channels
The standard JZ881 configuration provides 8 channels to meet the multiple communication combination mode of the user.
7. High speed wireless communication and Large data buffer zone
When the RF baudrate is bigger than COM baudrate, allowing to transmit unlimited length data at one time, when the RF baudrate is smaller or equal to the COMs, allowing the transmission of 255 Bytes data.
8. Intelligent data control and the user doesn't need to prepare excessive programs
Even for semi duplex communication, the user doesn't need to prepare excessive programs, only receiving/transmitting the data from the interface. JZ881 will complete the other operations automatically, such as transmission/receiving conversion in the air, control, etc.
9. High reliability, small and light
Single chip radio - frequency integrated circuit and single chip MCU are used for lessened peripheral circuits, high reliability, and low failure rate.
10. Watchdog monitor
Watchdog monitors the inner function, so it can change the traditional product structure and also improve the reliability of our modules.
Application Scopes:
* AMR Automatic Meter Reading
* Wireless alarm and security systems
* Home automation
* Low power telemetry
* Wireless conference voting system;
* Sports training & competition;
* Wireless dishes ordering;
* Wireless POS, PDA wireless smart terminal;
* Electronic bus station and intelligent traffic;
* RF transmitter Wireless electronic display screen and queuing machine;
* Wireless telemetry charging for parking, parking lot;
* Wireless modem Automobile inspection and four-wheel orientation;
* Wireless sensor Industrial wireless remote control and air conditioning remote controller;
* Observation and predication of oil well and hydrological information; * Point to multi-point wireless network, wireless on-the-spot bus and automatic data collection system
Wireless Transceiver Equipment | RS232/RS485/TTL Module JZ881