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Home Products and Services Amateur Bands 420 - 450 MHz (DL435)

420 – 450 MHz Embedded OFDM Transceiver (DL435-30)

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DL435-30 is a state-of-the-art, high performance embedded OFDM radio transceiver specially optimized for the frequency band 420 MHz ~ 450 MHz (70 cm). It features high data throughput with up to 600 mW Tx power, better Rx sensitivity and high noise immunity. DL435-30 features Doodle Labs’ proprietary PrismTM hybrid heterodyne technology with advanced filtering and noise reduction techniques for high interference immunity and long range applications. The DL435-30 has demonstrated the ability to provide high throughput even in extremely noisy environments. The rugged construction of DL435-30 makes it ideal for deploying in carrier class equipment.

DLM108 Front_Edited

DL435-30 maintains distortion free signal at higher modulation rates and high power to maintain low packet errors and maximize data throughput. The design uses highly linear power amplifiers to deliver maximum power even at 64 QAM radio modulations while maintaining low distortion EVM (Error Vector Magnitude). With better Rx sensitivity and high SNR, DL435-30 is specially designed to deliver best performance in long-range applications. The Industrial/Military grade design & enhanced resilience to RF surges & ESD makes it ideal for deploying in harsh environments.

 

Key Features

  • Best-in-class OFDM broadband radio technology ensures high throughput, spectral efficiency, advanced RF interference mitigation and resistance to multi-path delays for Near Line of Sight (NrLOS) performance.
  • Doodle Labs’ proprietary PrismTM hybrid heterodyne technology with advanced filtering and noise reduction techniques to achieve high Interference Immunity.
  • Operation in the 420 - 450 MHz UHF frequency (70 cm) band for Amateur radio services in the ITU’s regions 1, 2 and 3.
  • Up to 15 Mbps data throughput.
  • Software configurable high Tx power up to +28 dBm (600 mW) for long-range coverage.
  • High desensitization capability for out of band interfering signals.
  • Distortion free signal (low EVM) to maintain lowest packet errors to maximize data throughput at higher data modulation.
  • 128 bit AES encryption for over the air data security
  • Supports software configurable 5 and 10 MHz Channel Bandwidth to maximize spectrum efficiency.
  • Traffic prioritization queues for video, voice and data applications.
  • mini-PCI host interface
  • Supported by open source MadWiFi Linux kernel drivers
  • Proven compatibility with dd-wrt and many other 3rd party Wireless Router Operating Systems
  • Military grade design ensures durability in harsh operating environments
  • Two MMCX connectors provide flexibility in system design for antenna diversity or Internal/external antenna selection options

Technical Specifications

RADIO SYSTEM INFORMATION

Model No. and Product Status

DL435-30. Beta samples available now for speial OEM projects

Radio Frequency Range

420 MHz - 450 MHz. (See the channelization plan below).

RF Modulation

OFDM with 64 QAM, 16 QAM, QPSK, and BPSK. DSSS with CCK modulatons. Self-adapting modulation to maintain optimal link performance under different environmental conditions.

Radio Tx power

Software configurable from 12 dBm to 28 dBm

Channel Bandwidth

Software configurable 5, and 10 MHz

Data Throughput

Channel Bandwidth

TCP/IP (Mbps)

UDP (Mbps)

5 MHz

6

8

10 MHz

12

15

Data Security

128 bit AES Encryption

MAC Protocol

CSMA/CA

Wireless Error Correction

FEC, ARQ

Host Interface

32 bits, 33 MHz miniPCI Type III A

Host Driver Software

Open Source MADWiFi for Linux

Tx/Rx Specification

Radio Data Rate

Modulation

Max Tx Power 
 (± 1 dBm)

Rx Sensitivity

(± 2 dBm)

5 MHz Channel Width

1.5 Mbps

OFDM/BPSK

28 dBm

-97 dBm

2.25 Mbps

OFDM/BPSK

28 dBm

-97 dBm

3 Mbps

OFDM/QPSK

28 dBm

-95 dBm

4.5 Mbps

OFDM/QPSK

28 dBm

-93 dBm

6 Mbps

OFDM/16QAM

28 dBm

-90 dBm

9 Mbps

OFDM/16QAM

26 dBm

-86 dBm

12 Mbps

OFDM/64QAM

25 dBm

-81 dBm

13.5 Mbps

OFDM/64QAM

23 dBm

-78 dBm

10 MHz Channel Width

3 Mbps

OFDM/BPSK

28 dBm

-94 dBm

4.5 Mbps

OFDM/BPSK

28 dBm

-94 dBm

6 Mbps

OFDM/QPSK

28 dBm

-92 dBm

9 Mbps

OFDM/QPSK

28 dBm

-90 dBm

12 Mbps

OFDM/16QAM

28 dBm

-87 dBm

18 Mbps

OFDM/16QAM

26 dBm

-83 dBm

24 Mbps

OFDM/64QAM

25 dBm

-78 dBm

27 Mbps

OFDM/64QAM

23 dBm

-75 dBm

Channelization Plan
Region
Bandwidth Baseband


5 MHz 10 MHz Program Frequency
USA (420-450 MHz) 422.5 NA 2412
Operating Center Freq. (MHz) 427.5 427.5 2417
432.5 432.5 2422
437.5 437.5 2427
442.5 442.5 2432
447.5 NA 2437
Canada (430-450 MHz) 432.5 NA 2422
Operating Center Freq. (MHz) 437.5 437.5 2427
442.5 442.5 2432
447.5 NA 2437
Europe (430-440 MHz) 432.5 NA 2422
Operating Center Freq. (MHz) 437.5 NA 2427

PHYSICAL, ENVIRONMENTAL AND OTHER SPECIFICATIONS

Antenna Ports

Two MMCX Ports

Operating Voltage

3.3 Volts (±10%)

Power Consumption

4W @ 28 dBm, in continuous data transmit mode @ 6Mbps

2.7W @ 12 dBm, continuous data transmit mode

1.5W in continuous data receive mode

0.25W Standby mode

Ambient Temperature for transceiver (Operating)

Industrial grade (-25°C to +70°C). Recommended for the Outdoor/MIL-SPEC compliant Modem (-40°C to +85°C) development due to internal power dissipation.

Ambient Humidity (Operating)

10% - 95%, non-condensing

Dimension (LxWxH)

60 x 67 x 8 mm, approx. 40 grams

Environmental and Waste Management Compliance

RoHS, WEEE, 100% Recyclable Biodegradable packaging