Campbell Scientific SAT ARGOS Argos Transmitter - Manual (Page 9)

SAT ARGOS
3
SE
DIFF
G G H L
1 2 1 AG H L AG H L AG E1 AG E2 G
3 4 2 5 6 3
SE
DIFF
G G H L
7 8 4 AG H L AG H L AG E3 AG G G
9 10 5 11 12 6
P1 G P2 G C8 C7 C6 C5 C4 C3 C2 C1 G 12V 12V
SDM
5V 5V G G
SW 12V
SW 12V CTRL
Logan, Utah
G 12V
POWER
IN
CR10X WIRING PANEL
MADE IN USA
WIRING PANEL NO.
EARTH GROUND
CS I/O
G 12V
INT INT
EXT EXT BATTBATT
OFF ON
CHG
CHG
+12
+12
FIGURE 1-2. SAT ARGOS with Enclosure
2. Programming the Datalogger
2.1 Data Packets
Before programming the datalogger, you must determine how much data you
will be sending. Each Argos data packet holds 32 bytes; each data point uses
two bytes. With each data point using 2 bytes, you can send 16 data points in
each data packet. The Array ID is not sent. If you are writing a time stamp to
final storage, don’t forget to include the time stamp as additional data points.
The SAT ARGOS can hold up to four data packets. Each data packet is
transmitted as a single message. High resolution data points are four bytes, but
high resolution data are not supported by the P125 SAT ARGOS program
instruction.
2.2 Data Packet Transmission
When you setup your Service Argos account, you must select a message repeat
interval. The PTT will repeat the message at the repeat interval until a new
message is loaded into the PTT. Most applications will use a 200 second
message repeat interval.
When sending one data packet of 16 data points, the PTT will repeat the data
packet at the repeat interval. When sending two data packets of 16 data points