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Topaz Logo

Legacy Logo
Midland Two-Way Radio
Legacy Synthesized RF Data
Link Radio Telemetry Module

DL224 Legacy Synthesized RF Data Link Module

Sorry-This Data Radio is No Longer Available


Includes: FREE Programming

Lowest Price Guarantee
Visa, MasterCard, Discover and American Express Accepted
***Up to 2 Channels Programmed FREE***

$ Qty
UHF 450-470 MHz
Legacy DL224
12.5/25 KHz Ch Spacing
2 Channel - 2 Watts

Perfect for Water System Data

Check Out the SR-170 Repeater
Built using SD-170 Series Data Radios


The Legacy DL224 high speed RF Data Link Telemetry Radio combines durable construction and reliable hardware into one convenient package. This compact unit works with devices like irrigation systems, alarm systems and electronic signs to ensure consistent communication every time. The Legacy DL224 also works with POCSAG paging format - great for alarm and paging systems that utilize this type of data.


  • External Channel Switching:
    Toggle between channels from any
    off-site location
  • Remote Monitor:
    Monitor water levels, send data via
    an external modem
  • Ideal For:
    Irrigation Equipment: pumps, gauges
    Electrical Equipment: signs, gates
    Oil Refineries: pump and fluid flow
    Building Security: door usage, wireless alarms
    Weather Stations: air temperature, wind speed
    Fish Hatcheries: oxygen levels, water temp
    Golf Courses: sprinkler systems
  • Synthesized Frequency Tuning
  • 2 Watts RF Output
  • 450-470 MHz UHF
  • Programmable up to 2 Channels
    Programmable Wide/Narrow Band
  • Operates from 9.6V to 13.8 VDC
  • Complies with NTIA Specifications
  • Die-Cast Aluminum Housing
  • Time-Out-Timer Function
  • 9-Pin Interface Connector (DB9)
    (See connector pin-outs below)
  • PC Programming via Software and Cable (optional)

Got a Question?

Tough Conditions are No Problem for Legacy RF Data Modules

Tough Conditions?
No Problem for Legacy RF Data Link Modules

Check Out Other
Data Telemetry Radios:

SD-125EL Series  SD-170EL Series
SD-170EX Series  SD-270 Series 
TD-1500  TD-2400MD



 Optional Accessories - Antennas
Model # Description  NO LONGER AVAILABLE Price

 CA-4506B  6" UHF 440-470 MHz Antenna w/BNC connector
 CA-4506Y  6" UHF 488-512 MHz Antenna w/BNC connector
 Optional Accessories - Programming / Manuals
Model # Description  NO LONGER AVAILABLE Price

 ACC-2200  PC Programming Cable
  (Requires  ACC-920below) 
 ACC-920  PC Programming Software (MS-DOS)  WARNING!
 (Includes Disk & Instructions)
General Specifications  
  Legacy UHF DL224
Frequency Range 450-470 MHz (with tuning)
(Useable Bandwidth w/o tuning is 10 MHz from center frequency)
FCC ID Number O99SDU-2000
FCC Parts Parts  90
Channels 2
Channel Spacing 12.5 / 25 KHz
Channel Stepping

10 / 12.5 KHz

Channel Spread 10 MHz (without alignment)
Frequency Stability

2.5 ppm

Operating Temperature

-22 to +140 F (-30 to + 60 C)

Storage Temperature

-40 to +176 F (-40 to + 80 C)

Input Voltage

9.6V - 13.8V DC

Dimensions [HWD]

4.17" x 2.59" x .94" [106 x 66 x 24 mm]


8 oz [210 gm]


Die-cast Aluminum

IC Certification Number



ANSI/TIA/EIA-603 Receiver Specifications
  Legacy UHF DL224
Frequency Stability 2.5 PPM
Sensitivity (12dB SINAD) 0.35 uV (with CCITT filter)
Sensitivity (20dB Quieting) < 0.6 uv @ center channel
Selectivity 68dB (25 KHz) / 68dB (12.5 KHz)
Spurious Rejection




Audio Output

180 mV RMS @ 1 KHz  60% deviation

Audio Distortion

< 3% @ 1 KHz 60% deviation

Hum & Noise

-40 dB min with CCITT filter

Operating Voltage

7.2V - 13.8V DC

Current Drain

< 60 ma Standby

Carrier Detect

-120 to -80 dBm adjustable

Release Time

< 20 ms from TX to RX

Signal Switch Time < 10 ms @ 0.35 uV
ANSI/TIA/EIA-603 Transmitter Specifications
  Legacy UHF DL224
RF Power Output.

2 Watts @ 12V

Current Drain 1.4 Amps Typical @12V
Modulation 10K0F2D / 20K0F2D
Spurious & Harmonics -60dBc
FM Hum & Noise


Audio Distortion <5% @ rated modulation
Attack Time < 20 ms from RX to TX
Spurious & Harmonics -60dBc
FM Hum & Noise


TX Duty 20% max @ 30 sec.
Modulation Sensitivity 60% of max deviation @ 1 Khz / 50uV

Data Connector Pin Configuration

Legacy DL224 Data Port pin assignments

  1. Audio (data) input
  2. Audio (data) output
  3. PTT (active low)
  4. Ground
  5. VCC (+7.5 - 13.8 VDC)
  6. Carrier detect (active low)
  7. Clock for programming
  8. Channel A/B (default channel A active low selects channel B)
  9. PIO for programming

Topaz logo covering Maxon and Legacy products
Topaz technology, today, tomorrow. The Maxon and Legacy brand products in this document portray our experience and dedication to the communications industry. With continued growth and new product offerings, we are ready to meet the challenges of tomorrow.
Your assurance of quality. We are very proud of our product quality and stand behind every product we sell with these three Quality Assurance Promises:
  • 2 Year Parts and Labor Warranty
  • 6 Month Replacement Program Quality
  • Parts Performance Guarantee

From manufacture, our radio products are certified to strict ISO 9002 quality standards by one or both of these internationally known agencies.

Note: Complies with NTIA Specifications
Note: Features and specifications subject to change without notice

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Visa, MasterCard, Discover and American Express Accepted

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Terms & Conditions
Table of Contents

Copyright 2000-2018  Multec Communications / - All rights reserved. Do not duplicate without the express written consent of Multec Communications.
Shipping & Mail only - Note: returns require a RA# - see RETURNS  before shipping
Address...                      Note: warranty repairs only - see REPAIRS  before shipping

Multec Communications
319 Centre Ave.  #166
Rockland, MA  U.S.A.   02370-2613
781 294-4992 main
781 527-5004 fax (include return email w/fax)

Main 781 294-4992
- calling hours 2-5 EST  Monday-Friday for questions and tech support only...."Out of Area", "Restricted" and "Private Caller" calls may be blocked to avoid phone spam. Note: The main line is often very busy and voice mail is not available. Please place orders online using our secure e-commerce system. Save time...order online!

If you have questions about ordering please see  ordering information page  first. Phone orders slow processing time, increase inaccuracies and are not recommended.

Email questions or comments at - Email

Note: Not responsible for typographical, photographic or pricing errors.
         All pricing and specifications subject to change without notice.