Welcome To Seismic Source Company

Seismic Source Company is a manufacturer of seismic instruments and data acquisition systems. Its products are used in a broad range of applications: Seismology, Structural Monitoring, Seismic Site Evaluation, Civil Engineering, Gas and Oil Exploration, Industrial Vibration Monitoring.


Utilizing Sercel FDU & DSU Spread Cables

System Overview:

The most successful data acquisition system of our industry was designed by Sercel, France, the 408/428XL Land seismic acquisition system. Over 5,000,000 channels were delivered around the world! The two major building blocks of the field telemetry are the FDU and DSU3.
U-Node Alpha connects to either the FDU or the DSU cables and immediately turns the system into a modern "autonomous" nodal system.
Wi-Fi or Cable connections can be added to allow "Real Time" display of the seismic signals and records.



System Features:

Utilizes World’s most popular land seismic spread cables. Over 5,000,000 channels of FDU and DSU have been sold. Either one can be connected to U-Node boxes.

Extremely versatile, can be used with any sensor type and can be used in all survey conditions (artic, desert, marsh, etc.)

Each U-Node Alpha records up to 60 channels, and multiple U-Nodes can be de-ployed to record more channels.

The U-Node Alpha provides hot swap and smart battery discharge functionalities in order to facilitate the battery replacement during a survey.

LEDs on the case show the status of the equipment at all times.

Full software suite included with each system sold. Software provides support for autonomous or real time operation.

System compatible with Seismic Source's Universal Encoder/SourceLink system for control and operation of all land sources (Vibroseis, Dynamite, Weight Drop, etc.)

Recording Data for Any Project

System Configuration

One U-Node A can record 60 channels

One U-Node A can record data from up to 60 Sercel FDU nodes or up to 20 Sercel DSU nodes

U-Node crews can record either active or passive datasets

A crew can utilize a single U-Node for small projects or multiple boxes for large projects

U-Node boxes can be operated in either managed (triggered) or autonomous (continuous recording) mode

U-Node boxes can be triggered by direct connection or by radio link

System Compatibility

All U-Node acquisition systems are compatible with all Seismic Source control electronics


♦ Universal Encoder 3 for operation of any source on any project


♦ Force 3 Vibrator decoder/controller for Vibroseis acquisition


♦ Boom Box 3 decoders for acquisition with downhole or surface explosives


♦ Remote Trigger Box 3 for acquisition with mechanical impulsive sources


♦ VibLink IP and VibLink TDMA for high-speed crew communications from any location

U-Node Software and Specifications
U-Node Software
to Manage and Control Acquisition


Receiver Spread Management

Configure U-Node units

Assign receiver geometry

QC and troubleshoot receiver spread

Collect data from U-Node units

Display and Archive data files


Observer Screen


Source Operation Management

Configure source

Assign source point

Fire source

QC source performance



SourceLink Main Screen

U-Node Alpha Hardware

U-Node A Specifications


Sample Rate

2000, 1000, 500 & 250 sps

Internal Storage

128 GB standard

Network (cabled and Wi-Fi)



10-30 volts hot-swappable

U-Node Requirement

144 mA @ 13.75 volts

Weight (Metric)

2.3 kilograms

Weight (Imperial)

5.1 pounds

Size (Metric)

206 x 155 x 132 mm

Size (Imperial)

8.1 x 6.1 x 2.5 inches


The U-Node A Seismograph

Update Sercel-Equipped Crews with U-Nodes

Each U-Node A supports 60 single channel FDU modules

FDU Specifications

@ G400


Diff mode impedance



Full scale input

1.6 V RMS

400 mV RMS


> 130 dB



450 nV RMS

145 nV RMS

Instant dynamic range

130 dB


System dynamic range

140 dB



-110 dB


Gain accuracy

< 0.1%


Phase accuracy

20 uSec



110 dB


Power consumption

120 mW @ 8 Mbps, 132 mW @ 16 Mbps

from the Sercel Brochure

Each U-Node A supports 20 three-channel DSU modules

DSU Specifications



Acceleration Measurement

Full scale

5 m/s2

Tile max value

± 180 deg

Noise (10-200 Hz)

0.4 μm/s2/√Hz

System dynamic range

129 dB @ 4 ms


0-800 Hz (up to 1,600 Hz with degraded specs)


-90 dB

Amplitude cal accuracy


Orthogonality cal accuracy


Power consumption

285 mW @ 8 Mbps, 300 mW @ 16 Mbps

from the Sercel Brochure


  DX-6 Brochure Download U-Node Brochure

Seismic Source Co

2391 E. Coleman Rd.
Ponca City, OK 74604
Phone: (580) 762-8233
Fax: (580) 762-1785
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