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Wireless Data/Audio Transmission Module

  • Price:

    Negotiable

  • minimum:

  • Total supply:

  • Delivery term:

    The date of payment from buyers deliver within days

  • seat:

    Beijing

  • Validity to:

    Long-term effective

  • Last update:

    2017-07-14 08:27

  • Browse the number:

    191

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Company Profile

Hong Kong Safe Guard Co. Limited

By certification [File Integrity]

Contact：hksfgt(Mr.)  

Email：

Telephone： (86 755) 82908961 Ext:808 (86 755) 23736289

Area：Beijing

Address：Room 21L, Bld. 9C, Baoneng, Technology Park, No.1 Qingxiang, Road, Longhua New District, Shenzhen, Guangdong, China (518000)

Website： http://hksfgt.limingjie24.com/

PRODUCT DETAILS
Model Number: SG-M304-2 Brand Name: SAFE GUARD Key Specifications/Special Features: Introduction:SG-M304 is a module of DATA transmission integrated with voice communication. Specially designed for automatic industry with high reliability and stability. Provide voice transmission channel, can be connected to a microphone or loudspeaker directly, very easy to extend its functions and applications by the clients. And moreover, we are always ready for your OEM.Features:
  • Use TCXO and digital PLL advanced technologies, high stability
  • Integration of transceiver, both digital and analog signals can be send and switch quickly
  • Steady outsell, good hidden and stronger anti-interference
  • Industrial designes, work temperatures: -40~70℃
  • Several kinds of interfaces for choice: RS-232, TTL, RS-485
  • DATA format: 8N1/8E1/8O1 (customized)
  • Antenna impedance: 50Ω (SMA customized)
  • Applications:
    • Remote reading system of water, electric and gas supply
    • Building automation, security & protection, devices monitoring and access control system
    • Wireless calling system
    • Spot management, station management
    • RF transmitter Wireless electronic display screen and queuing machine
    • Electronic bus station and intelligent traffic
    • Alarm systems
  • Specifications:
    • Frequency: VHF/UHF ( 223-235MHz ）
    • Power: 500mW
    • Frequency stability: ± 2.5ppm
    • Mode: half-duplex
    • Channel spacing: 25KHz
    • Voltage: DC 12V ( Customized )
    • Transmission distance: 2km
  • Receiver indicator:
    • Usable sensitivity: ≤0.25μV (12dB SINAD)
    • Adjacent channel selectivity: ≥70dB
    • Spurious response Immunity: ≥ 65dB
    • Adjacent channel power ratio: ≥70dB
    • Audio output: 0.5W（8Ω, 10％ Distortion）
    • Distortion: ≤3％
    • Current: ≤ 50mA
  • Transmitter indicator:
    • RF output: 500mW
    • Adjacent channel power ratio: ≥70dB
    • Modulation distortion: ≤3％
    • Modulation sensitivity: 5mV
    • Current: ≤300mA
    • Size: 70*46*8mm
  • Complete set of equipment:
    • One module of SG-M304
    • One antenna
    • Name Description Level Remark
    1

    VCC
    DC
    12 V    		 DC 12V ( as good in range 7.5~15V), or customized
    2
    3
    GND
    GND
    ----
    -------------
    4
    5 A(TXD) RS-485 A or TXD of RS-232 Either RS-485 or RS-232
    6 B(RXD RS-485 B or RXD ofRS-232
    7 PTT Transmit control TTL Low level validity
    8 MIC Audio input --- Recommend 1K-2K, -27dB sensitivity of microphone
    9 SP Audio output --- 8Ω 0.5
    10 SQ Receiving indication TTL High-level
    Shipping Information:
    • FOB Port: Shenzhen
    • Lead Time: 3 - 5 days
    Main Export Markets:
    • Asia
    • Australasia
    • Central/South America
    • Eastern Europe
    • Mid East/Africa
    • North America
    • Western Europe

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