PXdragon DR-9400 PACTOR-4 Modem

Description

Use the new DR-9400 Pactor modem to send wireless e-mail, transfer files, use real-time data links, and access weather information, all over your SSB or VHF radio.  The PXdragon DR-9400 from SCS is the most advanced and most powerful PACTOR modem (aka TNC/Terminal Controller) available today.

Designed for professional use on HF and VHF bands, it provides stable and reliable data communication even without internet access. Whether for amateur radio, NGOs, emergency services or disaster operations – when communication matters, reliability counts.

What is PACTOR?

PACTOR is a digital transmission mode for the HF (shortwave) spectrum, designed to provide reliable communication even under the most challenging conditions. Developed by the German company SCS (Special Communications Systems), PACTOR has become the worldwide standard for robust HF data transmission. It enables email, text and file transfers entirely independent of cellular or internet networks.

The PXdragon DR-9400 PACTOR Modem

The DR-9400 continues the success of the renowned SCS DR-series, combining state-of-the-art signal processing with ease of operation. It supports PACTOR-1 / -2 / -3 / -4, Packet Radio (1k2 AFSK, 9k6 G3RUH) and Robust Packet Radio. Reception modes such as Weather-FAX (RX) and RTTY (RX) expand its capabilities, while the integrated PACTOR monitor allows live link analysis in real time.

Thanks to its compact design, the DR-9400 is ideal for both fixed-station and portable operation. Typical use cases include Winlink email communication, file synchronization, telemetry, and APRS beacons. Even under weak or disturbed signal conditions, the DR-9400 maintains a stable connection – perfect for emergency and field communication.

Applications

• Amateur Radio – worldwide email via Winlink or Airmail on Amateur Bands
• Maritime Safety – email and weather via Winlink or Airmail on Marine Bands
• NGOs & Relief Organizations – reliable HF communication in crisis areas
• Public Safety & Government – secure data transfer without public networks
• Diplomatic Services – confidential HF communication
• Research & Expeditions – dependable connectivity anywhere on Earth

Your Benefits with PACTOR

• Highest stability and data integrity on HF
• Worldwide coverage without internet or satellite
• Plug-and-play operation with common transceivers
• Optional encryption for secure data exchange
• Compatible with Winlink, Airmail and AlphaMail
• Fully engineered and manufactured in Germany

Technology and Features

PACTOR combines advanced digital signal processing with adaptive error correction. The modem continuously monitors channel quality and dynamically adjusts modulation and speed. With PACTOR-4, data rates of up to 10,500 bps are possible – far faster than Robust Packet or ARDOP. Automatic Repeat Requests (ARQ) ensure 100 % data integrity, even under noisy conditions.

Main Characteristics

• Supports PACTOR-1 to PACTOR-4
• High-speed data rates up to 10,500 bps
• Automatic channel and SNR adaptation
• EasyTransfer function for USB file exchange
• Integrated PACTOR monitor and Weather FAX reception
• Compatible with Winlink Express, Airmail and AlphaMail
• Robust aluminum chassis with USB, LAN and RS-232 interfaces

Why PACTOR?

Compared to other digital modes, PACTOR offers superior robustness and speed. Its adaptive modulation ensures a stable link where other protocols would fail. That makes PACTOR the first choice for mission-critical radio communication in professional and emergency networks.

Hardware – Quality Made in Germany

The PXdragon DR-9400 is developed and manufactured entirely in Germany using high-grade components and precision engineering. SCS has been a global leader in HF communication technology for decades, trusted by amateur radio operators, NGOs, maritime services and public authorities alike. Sales and support are provided in cooperation with WiMo Antennen und Elektronik GmbH in Herxheim.

FAQ – Frequently Asked Questions about PACTOR

• How does PACTOR work?
  PACTOR transmits digital data packets over HF radio waves and reconstructs them using automatic error correction for maximum reliability.
• How fast is PACTOR?
  With PACTOR-4, data rates up to 10,500 bps can be achieved – significantly faster than Robust Packet or ARDOP.
• Can PACTOR be used without the internet?
  Yes – PACTOR operates completely independent of cellular or data networks, making it ideal for remote locations and field operations.
• Which software is supported?
  Fully compatible with Winlink Express, Airmail, AlphaMail and other common software tools.

In Summary

The PXdragon DR-9400 is the most advanced and most powerful PACTOR modem on the market today.  It is even faster than previous PACTOR4 modems when used in the same environment. It enables reliable digital communication over HF and VHF – completely independent of internet or infrastructure. A true Made in Germany solution for amateur radio operators, relief organizations and authorities who must stay connected when conditions are at their worst.

The optional WiFi/Bluetooth USB dongle adds wireless connectivity options to the DR-9400. Activation of these features requires a separate license code.