PXdragon DR-9400 PACTOR Modems are the most advanced and powerful devices of their kind in the world, delivering efficient and reliable HF and VHF email and data communications for amateur, maritime, commercial and emergency applications. As the latest generation of the DR series, the DR-9400 continues the evolution of proven professional PACTOR technology for global radio communications where dependable data connectivity is essential.

WHEN COMMUNICATION MATTERS, RELIABILITY IS THE ONLY THING THAT COUNTS.

Developed by SCS and distributed by WiMo, the PXdragon DR-9400 supports PACTOR-1/-2/-3 and PACTOR-4, Packet Radio and APRS with 1200 bps AFSK and 9600 bps G3RUH and Robust Packet Radio. Reception modes such as Weather-FAX (RX) and RTTY (RX) and an integrated PACTOR monitor expand the range of applications. Its compact design makes the DR-9400 ideal for stationary and portable operation—perfect for email messaging, file synchronization, telemetry, or APRS beaconing. Modern signal processing, versatile interfaces, and robust protocols make the PXdragon DR-9400 a reliable solution for data-oriented radio operation, even in poor propagation conditions. Pre-assembled cables for common transceivers are ready for easy installation, and unterminated cables are available for customized interfacing solutions.

Choose between two versions: - PXN-DR-9400 Standard model, or - PXN-DR-9400-BTWF with a WiFi and Bluetooth Dongle and license key.

Select the appropriate premade Control Interface Cable and Audio Interface Cables listed in "Recommended Parts" that match your HF or VHF transceiver for faster connections for PACTOR mode operations.

Key features of PXdragon DR-9400 PACTOR Modems made entirely in Germany

• Multi-stage modulation methods (PSK, QAM) for maximum efficiency

• Compatible with all older versions (PACTOR 1 to 4)

• Secure connection with optional encryption

• Automatic adjustment to signal strength and signal-to-noise ratio

• EasyTransfer function for convenient file exchange via drag-and-drop

• Direct integration with software such as Winlink Express, Airmail, and AlphaMail

• High data rate: up to 10,500 bps with PACTOR-4

• Automatic repeat requests (ARQ) for 100% data integrity

• Multiband support: operation on all shortwave bands (2–30 MHz)

• Operate on emergency power; 12-28 VDC input

PACTOR is a modern digital transmission method for shortwave (HF), developed for reliable communication even under the most difficult conditions. Even with weak or disturbed signals, PACTOR enables stable data connections – ideal for email, text, telemetry, or file transfer, without the need for the internet. This technology was developed by SCS (Special Communications Systems) in Germany and is considered the global standard for professional HF data transmission.

Advantages with PACTOR

• Maximum data security and stability on HF

• Global coverage without the internet or satellite

• Plug-and-play operation with common transceivers

• Secure data transmission through optional encryption

• Compatible with Winlink mail systems

SPECIFICATIONS SCS PXdragon DR-9400 PACTOR Modems

Supported Operating Modes:

PACTOR-1 / -2 / -3 / -4

PACTOR Monitor

Packet Radio (9k6 G3RUH, 1k2 AFSK)

Robust Packet Radio (RPR)

APRS (Automatic Beaconing)

Weather-FAX (Receive only)

RTTY (Receive only)

Processor: ARM v8 Quad-Core @ 1.8 GHz

Operating System: PXdragon Buildroot Linux (real-time processing)

User Interfaces: - USB-C - LAN – Optional WiFi- Bluetooth on DR-9400 model, include on DR-9400-BTWF model

GPS Interface:

- Balanced, isolated GPS input (supports both TTL levels [3.3V / 5V] and V.28/RS-232)

- NMEA sentence decoder

- Software-switchable signal polarity

- Alternatively, USB GPS receivers ("GPS mouse") are supported, bypassing the hardware input.

(The hardware input is mainly for compatibility with legacy DR-7X00 modems.)

Storage: Industrial grade MicroSD card

Transceiver Audio Interface:

- Input impedance: 44 kΩ

- Input level: 30 mV to 6.6 V p-p

- Output impedance: 1 kΩ

- Output level: 30 mV to 5.0 V p-p

Status Indicators: 10 dual-color LEDs (green/red) indicating key operational states

Controls: - Toggle switch (Power On/Off) - RESET button

Time Base: Temperature-compensated oscillator (TCXO), 1 ppm accuracy

Power Supply (not included):

- Voltage: 12 V to 30 V DC

- Current consumption: 270 mA @ 13.8 V (typical), up to 1 A (max)

Dimensions (WHD): 6.614 x 1.772 x 3.937 in. (168 × 45 × 100 mm)

Weight: 1.04 lbs. (470 grams)