OTT HydroMet SUTRON XLINK 100, Руководство по эксплуатации и техническому обслуживанию

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
The station needs to consistently report a strong signal for 10 to 20 minutes to indicate good
antenna placement.

If signal strength is varying, the antenna's view of the sky is obstructed.

In theory, any signal strength above 0 means that a transmission can be made. However, to
ensure reliable and consistent data transmissions, reposition the antenna to get better signal.

A signal strength of 0 indicates that there is no signal at all; the station will not be able to make
any Iridium transmissions.
When installing the station, make sure the station consistently reports a signal
strength of 4 or higher for at least 10 minutes.
13.1.2 Short Burst Data
XLink uses the Iridium Short Burst Data (SBD) capability to send transmissions and receive messages.
XLink uses messages to communicate via Iridium. Messages may be sent to the station via Iridium, and the
station may send messages in return.
Each message may contain up to 340 bytes.
13.1.3 Transmission Data Content
Each measurement is independently setup with the data content for each transmission. Please section
10.8 T
RANSMISSION
D
ATA
C
ONTENT
S
ETTINGS
for details.
A single message can only hold a limited amount of data. If there is more data than can fit, multiple
transmissions will have to be sent. In order to receive the freshest data, the transmission interval should
be set such that only one message is sent at one time. Given the choice of getting one transmission every
15 minutes or getting two back-to-back transmissions every 30 minutes, opt for the 15-minute data. The
price is the same, but the data is refreshed more frequently.
The station will send up to five separate SBD messages for each transmission, providing a maximum
capacity of 1655 bytes worth of data. If that is not enough data, increase the transmission interval or
setup two different Iridium transmissions.
Iridium Setup
Please see section 11.3 I
RIDIUM
S
ETUP
for details on setting up Iridium.
Iridium Message Checking
When an Iridium Scheduled transmission is made, the system is notified of any incoming messages.
Checking for messages in this fashion does not incur any additional data usage costs.
If your station is set up to make transmissions every 30 minutes, that means that it will take up to 30
minutes for the station to receive any messages sent to it. If that is too long, you may consider turning on
Listening . Please see section 11.3 I
RIDIUM
S
ETUP
for more on Listening and Message Checking.