HXJZ-878 RF Data Radio User’s Manual
HXJZ-878 RF Data Radio User’s Manual About HXJZ-878 HXJZ-878, the Middle power wireless Radio, is used transmission and power consumption and good stability and reliability, as the wireless data It has the function of bi-directional data sign transmission, test and control.
HXJZ-878 RF Data Radio User’s Manual Even for semi duplex communication, the user doesn’t need to prepare excessive programs, only receiving/transmitting the data from the interface. HXJZ-878 will automatically complete the other operations, such as transmission/receiving conversion in the air, control, etc. 10. 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. 11.
HXJZ-878 RF Data Radio User’s Manual HXJZ-878 HXJZ-878 consists of transmitter, receiver, base band, Modem, CPU、RS-232 as follows: Interface: 1、 HXJZ-878 interface: 5 6 2 4 1 2 3 （1）Install orifice: Install and fixation HXJZ-878. （2）User interface: DB9 male Plug; （3）Power Plug: 2nd pin, right pin is anode, the left pin is cathode; （4）Antenna interface: N type TNC tie-in, female core , screw thread outside, impedance is 50Ω .
HXJZ-878 RF Data Radio User’s Manual 2、 HXJZ-878 Interface define: 1） User interface: HXJZ-878 have one interface of TTL/RS232/RS485, user can choose one Item no PIN Description User terminal 1 Null 2 TXD/A Serial data transmitting end RXD/ A (RS-485) 3 RXD/B Serial data receiving end TXD/ B (RS-485) 5 GND Ground DGND/AGND 4,6,7,8,9 Item no Remarks Null PIN Description Connected Level 1 GND to the terminal Ground 2 +12V +12V DC User terminal Remarks 9-15V DC Standard:
HXJZ-878 RF Data Radio User’s Manual HXJZ-878 parameters setting HXJZ-878 have one interface of TTL、 RS232、 RS485, You must specify the interface when you order. HXJZ878 main parameters: COM baud rate and verify，RF baud rate, Channel and frequency。 You can change these parameters by our RF Module software. When RF baudrate is faster than COM baudrate，One frame Can transmit limitless data. When RF baudrate is not faster than COM baudrate ，One frame Can transmit 255 bytes.
HXJZ-878 RF Data Radio User’s Manual 6 434.2332MHZ 14 461.1250MHZ 7 433.1580MHZ 15 461.5250MHZ 8 433.9260MHZ 16 462.1250MHZ Technical specification of HXJZ-878 Modulation mode: GFSK Working frequency: 430-470MHZ Transmission power: Receiving sensitivity: 5W - 123dBm Transmitting current:: <1.
HXJZ-878 2 3 4 No transmit or No receive Bit error rate High Indicator twinkling light RF Data Radio User’s Manual a、Radio is badness touch with PC/terminal. b、Radio with TTL/RS232/RS485 not match terminal. c、RX frequency and TX frequency is not same. a、antenna not match, or touch bad; b、RF baud rate is not right. c、 Power supply ripple is too great. a、Electromagnetism disturb in circumstance. b、Same frequency disturb in the circumstance.
