Stevens SatComm
Side view
1

Standard RS-232 interface for connection to external logger

2

Optional touchscreen for programming transmitter or integrated logger

3

COM port (“DCP Command”-ready) allows connection to secondary telemetry (Cell, Inmarsat, Orbcomm, Iridium, etc.) for 2-way communication and dual telemetry

Side view (internal logger)
1

​​Expandable storage via SD card

2

Sensor interface module port

Sensor interface module
1

12 VDC output

2

5 VDC output

3

4 Analog channel inputs, (0-5 VDC and 4-20 mA)

4

0-5 VCD alarm output

5

5 VDC output

6

24/switched VDC output

7

Pulse input (rain gage)

8

SDI-12 input (expandable, up to 12 sensors)

9

12 VDC output

The Stevens SatComm GOES transmitter sends data via the GOES Data Collection System (DCS) at both 300 and 1200 baud data rates. It can operate with any data logger capable of exporting data packets through a serial port in any format designated by the logger and permitted by NOAA/NESDIS.

For even simpler and more cost-effective remote GOES-based monitoring stations, Stevens SatComm is also available with an optional internal data logger, adding the ability for sensors to be directly connected for data collection, storage and transmission with a single low-power device.

  • NESDIS CS2/v2.0 certified
  • Compatible with most 3rd party data loggers
  • Two data logger input modes:
    • Continuous listen to data logger mode
    • Trigger mode using CTS “clear to send”, with programmable advance turn-on time
  • Two-way communication port
  • Available with integrated data logger (4 analog, 1 pulse and 12 SDI-12 sensor inputs, 1 control output)
  • VSWR measurement ensures proper antenna connection after installation, and alerts you of potential problems proactively

Stevens SatComm is fully compatible with most 3rd-party data loggers (connection via standard RS-232 port) or can be configured with an optional integrated data logger, allowing for basic data collection tasks and data transmission to be performed within one compact unit.

RELIABILITY for your most critical data

Stevens SatComm uses a TCXO (temperature compensated crystal oscillator) to provide exceptional power efficiency, minimal frequency aging and unsurpassed longevity.

Unlike OCXOs (oven-controlled crystal oscillator) typically used, a TCXO:

  • reduces the overall power consumption by eliminating a high current oven, eliminating the time and need for warm-up
  • is not vulnerable to breaking due to power cycling
  • maintains frequency over time without drift
  • minimizes the risk of station failure due to constant power-cycling, and ensures that transmissions always occurs within assigned timeslot.

User-selectable station health status information can be prepended to each transmission (battery voltage, message number, lat/long, VSWR, internal temperature, etc.), allowing remote alerting of potential problem conditions.

Data redundancy allows previous data set to accompany the current data set, increasing the chance of data retrieval even if a transmission is lost.

Two secondary COM ports (Touchscreen port and DCP Command port) allow dual telemetry (cellular, Inmarsat, Orbcomm, Iridium, etc.) for redundancy and 2-way remote station configuration and diagnosis.

VERIFY ANTENNA SIGNAL QUALITY, BEFORE YOU LEAVE THE SITE

VSWR measurement ensures good connection and signal path from the SatComm’s RF output to the antenna before the technician leaves the remote station. VSWR is continuously monitored as well, to protect expensive equipment in the event of damage to the RF connections, cabling, or antenna.

Technical Specifications

Power requirements

Input voltage range 10.5 to 16 VDC
Quiescent
During GPS acquisition 350 mA
300 BPS transmission 2.4 A (3 W max. with V2TH antenna)
1200 BPS transmission 3.5 A (10 W max. with V2TH antenna)

Maximum output power

300 BPS transmission 34.77 dBm (3 W max.)
1200 BPS transmission 40.0 dBm (10 W max.)

External interfaces

Computer interface USB type-B
External logger DB9-m connector interface
External touchscreen DB9-f connector interface
DCP command DB9-f connector interface
LED indicators Transmit, receive, failsafe, power, GPS lock status, built in self test (BIST)

Timekeeping

Transmission timing accuracy Meets NESDIS specifications
GPS time accuracy Within 0.01 s (10 ms) UTC

Certified antennas

Stevens V2TH +5.5 dBic gain, RHCP
Stevens V4TH +10 dBic gain, RHCP
Stevens Yagi +11 dBic gain, RHCP

Data transmission

Reporting Self-timed or random reporting
Format ASCII or pseudo binary

Physical

Temperature -40° F to +149° F (-40° C to +65° C)
Humidity 0 - 95% relative humidity non-condensing
Dimensions (W x L x H) 4.625” x 8.81” x 2.096” (11.75 x 22.38 x 5.32 cm)
Length Including mounting plate 7.169”, face-to-face

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Articles

How to Add a Secondary Telemetry to Your GOES Station

GOES, for all it’s no-cost, reliable virtues, has some drawbacks. First, it’s a one-way transmission—there’s no way of sending any data to your station. This means there’s no way to reprogram a data logger or reboot a stuck data logger or purge a bubbler without (an unplanned) visit to the site. The Stevens SatCom GOES… Read more

Top 9 specs to consider in a GOES transmitter in 2016

If you haven’t considered these specs before, you should—and here’s why. Option to easily add 2-way telemetry. The reasons for having 2-way redundant telemetry are explained in the above article…a dual-telemetry system can always be cobbled together, but when the GOES transmitter is designed with this capability built-in, things are so much easier. TCXO frequency… Read more

An Overview of Stevens’ Approach to Making Remote Communications Simpler, More Flexible and Incredibly Reliable

Here is an overview of three (3) different remote data collection scenarios using Stevens products that can increase the reliability of your networks, can work with virtually any existing equipment, and are super easy to install, configure and reconfigure (anytime, anywhere). The three (3) are GOES dual telemetry, Cell-Net, and eTracker. The power of the… Read more
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