
Advanced Telemetry Systems, Inc. R4500S Reference User Manual R05-11-A
67
18.0 EXT – External Data Output
If the EXT option has been selected the R4500S will send data once an hour out the
AUX
and the
PC/CLONE
ports while stationary logging. If using GOES (Geostationary Operational Environmental Satellites) option, the data
will be sent to the GOES transmitter’s buffer thru a cable attached via the
AUX
port. While the R4500S is sending
data out its serial ports one or two status screens will be displayed.
Screen 1
This screen indicates the R4500S is starting to send data out. The example above has 8 data blocks in memory to
process. Only valid data blocks will be sent. The number of blocks the R4500S sends may actually be less than 8.
For example there could be informational blocks that contain programming information for your R4500S that would
not be sent.
Screen 2 (GOES option only)
This screen indicates the number of bytes that were sent over versus the number of bytes that the GOES
transmitter sent acknowledges for. If these numbers do not match a “
CHECK
” will flash on the screen indicating a
probable system problem. If this happens check your connections. Also make sure your GOES transmitter is turned
on and operating correctly. The GOES transmitter should display the same number of bytes in its buffer.
If the R4500S determines there were more bytes of data to be sent over to the GOES buffer than the GOES
transmitter can transmit, it will save this data for the next hour’s transmission cycle. You should try to set up your
system so that it does not log more data than it can transmit in a 24 hour period. For fixed period logging each data
point will use 11 bytes. For variable period logging each data point will use 11-12 bytes depending on the type of
data being transmitted. Assume an extra 29 bytes overhead for the header and footer of the transmission block.
Check with NESDIS to determine how many bytes your transmission assignment will allow.