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

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13.4 Retransmissions
XLink is able to make retransmissions (ReTx). Retransmissions are retries of failed scheduled
transmissions. The goal of retransmissions is to automatically retransmit data that was in the failed
transmissions.
13.4.1 How Retransmissions Work
When a scheduled transmission fails, the system notes the time of the failure. Once a future scheduled
transmission succeeds, the system will proceed to re-transmit the data from the missing transmissions.
Here is an example of retransmissions in action:
o
12:00 Scheduled transmission succeeds. All is well.
o
12:30 Scheduled transmission fails due to lack of network.
o
13:00 Another scheduled transmission fails.
o
13:30 Scheduled transmission succeeds. Network is back up.
o
13:31 Retransmission with data as if it were 12:30 completes.
o
13:32 Retransmission with data as if it were 13:00 completes. All previously missing data has
been transmitted.
o
14: 00 Scheduled transmission completes. Back to business as usual.
13.4.2 Retransmission Setup
For retransmissions to take place, the setting Retransmit must be enabled. It is enabled by default. A
proper Tx Format is also needed to ensure that the data in the transmission is timestamped.
Pseudobinary B is the only unacceptable format. Use Pseudobinary D instead of Pseudobinary B.
Enable Retransmit and choose any Tx Format but Pseudobinary B to take advantage of
Retransmissions.
Only scheduled transmissions can be retransmitted.
For optimal retransmission performance, please use the following settings:

Radio Type: Cell or Iridium

Kind: Scheduled

Format: CSV, Pseudobinary D

Tx Data Content: All Logged

Setup needs to remain constant; changes to telemetry and measurement setup may result in
incorrect sensor data in retransmissions.
13.4.3 Notes
o
Toggling recording, clearing status, and changing some telemetry settings will clear out any
pending retransmissions. Rebooting a station will NOT reset transmissions.