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ST-21 Argos

Satellite

Transmitter

User Manual

Issued 10.12.12

Copyright

©

2006-2012 Campbell Scientific, Inc.

Copied under licence by Campbell Scientific Ltd.

CSL 884

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Summary of Contents for ST21

Page 1: ...ST 21 Argos Satellite Transmitter User Manual Issued 10 12 12 Copyright 2006 2012 Campbell Scientific Inc Copied under licence by Campbell Scientific Ltd CSL 884...

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Page 3: ...e repair is under guarantee or not Please state the faults as clearly as possible and if the product is out of the guarantee period it should be accompanied by a purchase order Quotations for repairs...

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Page 5: ...l cell phones and aerials may also not be applicable according to your locality Some brackets shields and enclosure options including wiring are not sold as standard items in the European market in so...

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Page 7: ...Number 3 2 1 3 Decimal ID Number 3 2 1 4 Frequency 3 2 2 ArgosData 3 2 2 1 General Description 4 2 2 2 ResultCode 4 2 2 3 ST21Buffer 4 2 2 4 DataTable 4 2 2 5 NumRecords 4 2 2 6 DataFormat 4 2 3 Argos...

Page 8: ...ansmitter 1 1 2 The ST 21 s 9 pin connector attaches to the datalogger via the SC12 cable 2 3 1 The ST 21 s BNC connector attaches to the antenna via the antenna cable 6 3 2 The 12022 antenna 7 Tables...

Page 9: ...Figure 1 1 ST 21 Argos Satellite Transmitter 1 1 Specifications Power supply Nominal 12 volts DC 10 volts DC minimum 16 volts DC maximum Current drain at 12 volts 1 12 mA quiescent 375 mA during trans...

Page 10: ...ng 20 bit ID numbers 32 bytes of data can be stored in the buffer The data buffers are numbered 0 through 7 with 7 being reserved for other uses Data buffer setup can be done by the factory or under d...

Page 11: ...in memory until the PTT resets Once the setup parameters are set use ArgosData followed by ArgosAutoRepeat Data in a buffer is saved until the PTT resets or is overwritten by another occurrence of Ar...

Page 12: ...ds NumRecords is the number of data records that will be copied from the data table to the Argos PTT Care should be taken to make sure the total amount of data does not exceed what the buffer can hold...

Page 13: ...smit instruction allows the datalogger to control the timing of each transmission If a buffer is set to transmit but the buffer has not been setup with valid parameters ArgosDataRepeat will fail 2 4 A...

Page 14: ...a Connector and Antenna The ST 21 s BNC connector is for attaching the antenna see Figure 3 1 Figure 3 1 The ST 21 s BNC connector attaches to the antenna via the antenna cable The connector s RF outp...

Page 15: ...lite passes over the poles 14 times a day providing 28 satellite passes per day Coverage decreases with latitude At the equator the PTT will see a satellite six or seven times a day The duration of th...

Page 16: ...1 http www cls fr html argos welcome_en html 5 Antenna Placement The position of polar orbiting satellites relative to the PTT will change during the satellite pass and with each satellite pass The an...

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Page 18: ...rta T5M 1W7 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientific Centro Caribe S A CSCC 300N Cementerio Edificio Breller Santo Domingo Heredia 40305 COSTA RICA www campbellsci cc i...

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