Argos Satellite / ST-20
RETIRED ›
This product is no longer available and has been replaced by: ST-21. Some accessories, replacement parts, or services may still be available.
ST-20 Argos Satellite Transmitter

Overview

The ST-20 Argos Satellite Transmitter was well suited for remote meteorological and environmental data collection applications, including mobile and high-latitude installations. While Campbell Scientific's ST-20 Argos PTT was based on Telonics' ST-20, they were not equivalent; our ST-20 included a case, voltage regulator, and our SDC communication interface.

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Detailed Description

Campbell Scientific's ST-20 was a Service Argos-certified Platform Transmitter Terminal (PTT ) that transferred data from the datalogger site to the Argos Data Collection and Location System via NOAA polar orbiting satellites.

Please note that when ordering the transmitter, the customer needed to provide Campbell Scientific with the number of buffers, repetition rate, decimal ID, Dex ID, frequency, and fail safe information.

Note:
While Campbell Scientific's ST-20 Argos PTT was based on Telonics' ST-20, they were not equivalent; our ST-20 included a case, voltage regulator, and our SDC communication interface.

Specifications

Supply Voltage 12 V, nominal
Output Impedance 50 ohm
High Power Level 800 mW typical; 27 to 31 dbm
Argos Transmission Frequency 401.618 to 401.680 MHz
Modulation (BPSK) -1.1 to +1.1 ±0.1 radians
Current Drain at 12 Vdc
  • 1.12 mA (quiescent)
  • 375 mA (transmitting)
Spurious Emissions -45 dB
Dimensions 19.05 x 5.72 x 3.18 cm (7.5 x 2.25 x 1.25 in.)
Weight 224 g (7.9 oz)

Compatibility

Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Dataloggers

Product Compatible Note
CR1000
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR295X (retired)
CR3000
CR5000 (retired)
CR800
CR850
CR9000X

Mounting Equipment

Product Compatible Note
ENC10/12
ENC10/12R
ENC12/14
ENC14/16
ENC16/18

Additional Compatibility Information

Enclosure Considerations

The ST-20 requires a desiccated, non-condensing environment; a Campbell Scientific enclosure is recommended. Grommets and screws are provided to attach the ST-20's flanges to the backplate of our enclosures.

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