QDR 900MHz Digital Radio

The QTech Digital Radio (QDR) is a low power digital modulation radio solution which is fully compliant for use in Australia and New Zealand.

QDRs provide low cost RS485 or RS232 cable replacement options and are ideal for use between DATRAN RTUs and expansion modules, or between industrial controllers and sensors.

January 2024 – The QDR is currently unavailable.

Due to unforeseen component sourcing issues, we are unable to manufacture the QDR. Please contact us for further assistance.

Application examples include RS232 master/slave configuration, as a “Point to Point” system or even as a “repeater” for more challenging projects within certain packet size limitations (see the datasheet for more information).

Key Features include:

    • Point-to-point and point-to-multipoint configurations available
    • Indoor/sheltered urban range up to 500m with supplied 2.1dB dipole antenna
    • Outdoor range of up to 6km with with optional 6db Yagi or Whip antenna
    • 6 radio channels
    • 9600bps Data Rate
    • Maximum packet size 255 bytes
    • USB port for configuration
    • Current Consumption 150mA max
    • Outstanding receiver sensitivity of -110 dBm
    • 900 MHz digital modulation communications


• Frequency 917 MHz to 927 MHz (ISM Band)

• RF Output 1mW to 250mW

• Technology Digital Frequency Modulation

• Modulation GFSK Gaussian Frequency Shift Keying

• Hopping Channels 6

• Maximum Packet Size 256 bytes

• Antenna connector SMA

• Weight 330g

• Dimensions L 200 x W 107 x D 37 mm

Ordering Details

  • Product Code: PD9119-232 (for RS232 use)
  • Product Code: PD9119-485 (for RS485 use)

Please refer to our website for further product information and optional accessories.

Product Downloads

QDR 900MHz Digital Radio – Datasheet

QDR 900Mhz Digital Radio – User Guide

QDR – Test Certificate

Download Workbench Software