RETIRED ›
This product is no longer available and has been replaced by:ST-21.
ST-20 Argos Satellite Transmitter
Services Available
Repair No
Calibration No
Free Support No

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 data logger 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.

Data Loggers

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

Mounting Equipment

产品 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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