COFDM SPECIALIST
Mobile video wireless communication

PRODUCT DETAIL
Wireless Data Module SG-M304
Code: SG-M304
Original: 0.00
Detail

Name:

SG-M304 Professional Wireless Date modem

Model:

SG-M304

Product Features:

1)High stability, high reliability

2) Provided standard external interfaces(RS-232/RS-485/TTL)

3)Easy installation and maintenance, strong diffraction ability, flexible network structure

4)Suitable for multi-point and scattered, complex geographical applications

5)Widely used in electricity, meter reading, environmental protection,warehouse management, PTZ control, alarm, GPS positioning information back, GIS and other areas  monitoring, data real-time transmission etc.

6)Satisfy clients requirements for real-time and accurate data.


Detailed Description as Follows:


Device Parameters

Overall Index

Working Frequency: 230MHz

Frequency Tolerance:±5ppm

 

Channel Spacing: 25KHz

Antenna Impedance:50Ω

 

Environment Temperature:-25℃~+55℃

Data Transmission Rate:1200/2400/4800bps

Receiving Index

Receiving Sensitivity:≤-119dBm

(better than 12dB SINAD)

Remaining Level:≤-45dB

 

Modulation Bandwidth:≥5KHz

Adjacent channel selectivity:≥65dB

 

Intermodulation:≥65dB

Stray:≥65dB

 

Standby Current:≤60mA

 

Transimission Index

Transmission Power: ≤500mW





 

Adjacent-channel Power Ratio: ≥70dB

Spurious RF component: ≤-70dB

 

Working Current: ≤300mA

 

Power

DC Voltage:5/12V

 

Dimension

70×46×12mm

Antenna Interface:SMA-50 Ohm

Interface Definition

 

 

1#

Vcc

Power 5 ~ 12V

2#

Vcc

Power 5 ~ 12V

3#

GND

Ground Wire

4#

GND

Ground Wire

5#

RXD(A)

Radio data reception /485A

6#

TXD(B)

Radio data transmission/485B

7#

PTT

Sending Control

8#

MIC

Voice Input

9#

SP

Voice Output

10#

SQ

Receipt Signal Indicator

 

 

 

Interface Format

 

 

8N1

1 start bit + 8 data bit +1 stop bit, no parity

8E1

1 start bit + 8 data bit +1 stop bit + even parity

8Q1

1 start bit + 8 data bit +1 stop bit + odd parity

Operation Mode

 

 

 

It is receiving state when power standby ; When the data port detects a data input, the radio automatically transmits. After the data transmission, it turns to receiving state.

 

 

 

Notes

 

 

1

Adopt small  rippled and stablized power supply or battery.

 

2

The antenna should be kept away from the power supply.

 

3

Power supply capacity should meet 5/12V/500mA

 

4

The distance between the experimental stations should be farther than 5 meters

 

5

Install the Antenna in high place, no shelter within 30 meter coverage

 

Tips: After the radio connected to the antenna, the distance between the radios should be more than 10 meters to avoid too strong signal caused blocking!

The device link diagram as follows:


Notice:


1 Use the min. grain wave and high anti-jamming switch power or batteries;

2 The power capacity must meet D.C. 5~12V,more than 800mA output current

3 The space between the experiments Radio should be more than 5m. The antenna should span on the high to increase the distance of electric wave. It is important for using shortwave communication equipment in the city.

4 After connecting the antenna to the Radio, the space between the Radios should more than 10m, so avoid signal backup.

5 The antenna plywood should nip in the connection inside the antenna, but not nip the antenna projectile, so avoiding the performance of the antenna.

High frequency cable don’t come down directness, circle a circuit and fix up it on the frame for the best.


1 Use the min. grain wave and high anti-jamming switch power or batteries;

2 The power capacity must meet D.C. 5~12V,more than 800mA output current

3 The space between the experiments Radio should be more than 5m. The antenna should span on the high to increase the distance of electric wave. It is important for using shortwave communication equipment in the city.

4 After connecting the antenna to the Radio, the space between the Radios should more than 10m, so avoid signal backup.

5 The antenna plywood should nip in the connection inside the antenna, but not nip the antenna projectile, so avoiding the performance of the antenna.

High frequency cable don’t come down directness, circle a circuit and fix up it on the frame for the best.



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