Campbell SAT ARGOS Manual do Utilizador descarregar pdf (Página 116)

ZENO

-3200 USER MANUAL

Coastal Environmental Systems (206) 682-6048

Page 108

 If you will be using self-timed transmissions, specify the self-timed transmit channel number,

transmission interval, and transmission offset (Line Items #2 through #4).

 Specify the transmission window length in minutes, and the satellite preamble length, Line Item #6,

as SHORT or LONG.

 If you are using a Campbell Scientific SAT HDR GOES transmitter, set the GOES bit rate in Item 10

and the Interleaver in Item 11.

 If you will be using random transmissions, set the random transmission channel number, the random

transmission interval, and the random transmit disable time. When a random transmission is required,

the GOES radio will transmit the random message at the frequency specified in the random

transmission interval, until the end of the random transmit disable time. for example, if you set the

random transmission interval to 1 minute and the random transmit disable time to 5 minutes, the

GOES radio will transmit the random message once per minute to 5 minutes.

 Enter I{ENTER} to initialize the GOES radio. This loads the channel number and other information

to the GOES radio. It also deletes all data currently in the transmit buffer. The ZENO

-3200 will

prompt you to give the system date and time. You must give this value accurately, and in GMT

124

(also known as UTC

125

–– 8 hours ahead of Pacific Standard Time).

When initializing the GOES transmitter you must also set the system clock

to GMT or UTC.

126

The GOES transmissions are timed on the transmitter’s clock. Unlike the ZENO

-3200’s system clock,

the transmitter’s clock does not retain its time through a power failure. Therefore, every time the

Telonics TGT-1 GOES transmitter loses and regains power, the GOES clock must be set again by re-

initializing the GOES transmitter using GOES Menu option I. If there is a backup battery to the Telonics

TGT-1 GOES transmitter, resetting of the clock after initial system deployment is not necessary.

For a Campbell Scientific SAT HDR GOES transmitter, you do not need to re-initialize the transmitter if

there is power failure since its clock is set according to an internal GPS receiver.

With these communications settings any regular ZENO

-3200 Data Output messages routed to COM2

will be sent to the GOES transmitter. At the programmed time, the GOES transmitter will transmit the

contents of its data buffer over the self-timed transmit channel when the next self-timed transmission

interval occurs. Any alarm messages generated by the ZENO will be transmitted over the random

transmit channel with the frequency specified in the GOES menu.

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You may send a maximum of ONLY 355 bytes in a single transmission.

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GMT is Greenwich Mean Time.

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UTC is Universal Time Coordinate.

126

The Campbell Scientific SAT HDR GOES transmitter obtains its time from a GPS (Global Positioning System)

receiver.

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Refer to Section 11.3.3.

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