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400-440 MHz UHF Radio Modem

  • 400-440 MHz UHF Radio Modem
  • 400-440 MHz UHF Radio Modem

400-440 MHz UHF Radio Modem

    Payment Type: T/T
    Terms of Trade: FOB
    Min. Order: 2 Set/Sets
    Delivery Time: 9 Days
    Packaging: Environmentally friendly paper packaging
    Productivity: 10000 sets / year
    Brand: PuFangTech
    Transportation: Ocean,Land,Air
    Place of Origin: China
    Supply Ability: 20000 sets / year
    Certificate: SO9001 certification
    Port: Shenzhen

Basic Info

Model No.: GD420HH25

Product Description

GD420HH25 is a half-duplex UHF radio modem that operates on 400 to 440 MHz frequency band. Channel spacing 12.5 and 25 kHz are available, with over-the-air data rates 9600 bps in 12.5 kHz channel spacing or 19200 bps in 25 kHz channel spacing, respectively. The radio modem is compatible with the most widely used serial interfaces RS-232, RS- 485 and RS-422. With output power of 25 watts, It meets both the technical and economical requirements set on wireless communications in a number of applications, including remote meter reading (gas, electricity, heat), remote control of water distribution, remote control of irrigation systems and environmental monitoring.
RF SCADA Radio Modem

1. General
(1) Operating frequency range: 400 to 440 MHz
(2) Channel spacing: 25 KHz or 12.5KHz
(3) Number of channels: 60
(4) ANTENNA IMPEDANCE: 50 Ohm unbalanced
(7) OPERATION VOLTAGE RANGE: 12V DC ( 11Vdc to 14.5V DC)

(1) RF OUTPUT POWER: 5W to 25W programmable
(2) OUTPUT 2ND HARMONIC: less than –65dB
(3) SPURIOUS EMISSIONS: less than 0.25uW (30MHz to 1GHz)
(6) RF IMPEDANCE: 50 Ohm unbalanced
(7) CURRENT DRAIN: 6.0A @25W output power
(8) FM HUM AND NOISE RATIO: greater than –50dB
(9) AUDIO FREQUENCY DISTORTION: 3% 1KHz for 3KHz deviation
(10) AUDIO FREQUENCY RANGE: 300Hz to 3400Hz ±2dB
(11) TRANSMITTER ATTACK TIME: less than 7ms

(1) TYPE OF RECEIVER: Crystal controlled double, super heterodyne
(2) INTERMEDIATE frequency: 45MHz(1st IF), 455KHz(2nd IF)
(3) SENSITIVITY: Better than 0.2uV @12dB SINAD
(4) SQUELCH SENSITIVITY: 0.1uV to 1uV programmable
(6) SPURIOUS AND IMAGE REJECTION: greater than –65dB
(7) OUTPUT AUDIO DISTORTION: 3% at 1KHz for ±5KHz deviation
(8) FM HUM AND NOISE RATIO: greater than 40dB

3. Data and Interface
(2) AIR RATE: 19200 or 9600bps programmable
(3) INTERFACE BAUD RATE: 600 - 38400 bps programmable
(4) INTERFACE DATA BIT: 8 / 7 bit
(5) INTERFACE PARITY BIT: None / Even / Odd
(6) INTERFACE STOP BIT: 1 / 2 bit

Shenzhen PuFang Technology Co., Ltd.


Shenzhen PuFang Technology Co.,Ltd. is a leading provider dedicated to research, design, development, and manufacturing of radio data devices for wireless networking solutions as well as various mobile data applications.

PuFang's technical expertise has enabled the company to build highly successful products celebrated for innovation, quality and reliability.

PuFang has outshined the competition by focusing on its goal, which is to deliver quality high-performance and yet cost-effective wireless data devices to our customers.

The PuFang series of VHF/UHF radio modem with voice capabilities provide our customers with flexible, seamless and reliable solutions in fields like SCADA, remote control, monitoring and data acquisition. We provide cost effectively, well performed, user friendly solutions for ownership as well as networking facilities' OEM manufacturers.

Company Info

  • Company Name: Shenzhen PuFang Technology Co., Ltd.
  • Representative: Judy Shu
  • Product/Service: Radio modem , Wireless modem , Wireless earphone , RF transmission , Remote control , Data modem
  • Capital (Million US $): 2000RMB
  • Year Established: 1996
  • Total Annual Sales Volume (Million US $): US$1 Million - US$2.5 Million
  • Export Percentage: 1% - 10%
  • Total Annual Purchase Volume (Million US $): US$1 Million - US$2.5 Million
  • No. of Production Lines: 2
  • No. of R&D Staff: 5 -10 People
  • No. of QC Staff: Fewer than 5 People
  • OEM Services Provided: yes
  • Factory Size (Sq.meters): Below 1,000 square meters
  • Factory Location: 12F, Jinsong Building, Terra Industrial Park, Futian, Shenzhen, China
  • Contact Person: Mr. Antony Lee
  • Tel: 86-755-83476931
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