The Maxon data radio with FSK module modification is a versatile solution for wireless applications. It supports baud rates from 1200 to 9600, AC/DC audio coupling, and advanced squelch systems (CTCSS, DCS, two-tone, and RSSI). With GPS data handling, adjustable power output, and a compact DE9 and BNC connector design, it ensures reliable performance.

Product Features:

• The Maxon SD-125E Series operates within the 148-174 MHz VHF frequency band.
• It supports 16 dip switch-selectable channels.
• It features an adjustable transmission power of 5W/1W for optimized energy use.
• It offers channel bandwidth options of 12.5 kHz and 25 kHz.
• It incorporates CTCSS, DCS, two-tone squelch, and RSSI-based squelch systems for interference management.
• The baud rates are configurable from 1200 to 9600, allowing flexible data transmission.
• AC and DC audio coupling enhance signal processing.
• Integrated GPS functionality enables seamless location-based data handling.
• A time-out timer prevents excessive transmission to maintain system integrity.
• The device is equipped with DE-9 male RS-232 and BNC antenna connectors.
• Built-in LED indicators provide real-time status updates.
• Its rugged die-cast aluminum housing offers superior RF shielding and environmental durability.

Transmitter:

• Output Power: VHF/UHF 5/1 Watt
• FM Hum & Noise: >40 dB (12.5 kHz), >40 dB (25 kHz)
• Modulation Sensitivity: 100 mV RMS @ 60% peak dev
• Spurious Emissions: -57 dBm
• Frequency Deviation: Peak ± 2.5, min. ± 1.9 kHz (12.5 kHz), Peak ± 5.0, min. ± 3.8 kHz (25 kHz)
• Adjacent Channel Power: 70 dBc (25 kHz), 60 dBc (12.5 kHz)
• Audio Response: Within +1/-3 dB of 6 dB octave pre-emphasis characteristics from 300~30000 Hz

Receiver:

• Sensitivity: 0.30 μV (12.5 kHz), 0.28μV (25 kHz)
• Selectivity: >60 dB (12.5 kHz), >70dB (25 kHz)
• Intermodulation: >65 dB
• Spurious Emissions: -57 dBm (9 kHz - 1 GHz), -47 dBm (1 GHz - 4 GHz)
• Rx Hum and Noise: 40 dB (12.5 kHz), 40 dB (25 kHz)
• Receiver Response Time: 16 ms
• Squelch Decay Time: 5 ms Min., 20 ms Max.
• Audio Output Power: 0.5 Watts

Application Areas:

• Water/waste treatment plants
• Oil & Gas field SCADA
• Security/Alarm systems
• Gate ID Tag systems
• Remote controls
• Commercial Sign Control
• Automatic Vehicle Location
• Kill Switches
• Weather monitoring
• Irrigation systems
• Emergency Call boxes
• Low power repeaters

In the Box:

• 1 x Maxon SD-125EL-V2 + SD-125EL-U2-FSKHD15 custom-built Data Radio.

Documents:

Maxon Data Radio with FSK - Datasheet