long range 485 Data Transmitter

1

Transfer rate: 2400bps, compatible voice or data signal transmission 

2

Can be set 256 Spots, the channel spacing is 25KHZ (standard) 

3

Integration of transceiver, both digital and analog signals can be send and switch quickly

4

Either co-frequency or unco-frequency in air transmission

5

Double loop and VCO structure, high stability

6

Use 30W imported power amplifier module

7

Use standard TTL, RS232 (or 485) level, convenient to connect to the control keyboard or personal computer directly

8

SMT design, stainless steel outshell, miniature size and easy to install, can stick heat sinks

9

Testing methods is in accordance with Mobile Communications “90” standard

Transmitter System Indicators

Frequency

150MHz, 230MHz, 350MHz, 450MHz

RF Power

20W

Power

12-14V

Current

≤6A

Frequency stability

± 2.5ppm

Channel spacing

25KHz

Antenna Impedance

50Ω

Ambient temperature

-30 ~ +60

Frequency settings

data-chosen-switches or be written on the computer

Data transfer rate

1200bps/2400bps/4800bps/9600bps

Modulation

FSK/MSK

Modulation Distortion

≤ 3%

Modulation Sensitivity

100mV (3KHz offset)

Adjacent channel power ratio

≥ 65dB

Spurious frequency components

≤-65Db

NLOS distance

20~30km

Receiver System Indicators

Usable sensitivity

≤-120dBm (12dB SINAD)

Residual level output

≤-45dB

Receiver Bandwidth Modulation

≥ 5KHz

Adjacent channel selectivity

≥ 65dB

Intermodulation Immunity

≥ 60dB

Spurious Response Immunity

≥ 65dB

Demodulated output

≥ 0.2V audio voltage

Packaging Details 

Accessories

1*antennas (customized)

Style

Paper carton

Size

Undetermined

Overall Weight

5kg