Acoustic Research Ngara, Руководство пользователя

Страница: 17 / 80

Ngara
User Manual
3.2 Noise Cloud
When operating as a Noise Cloud logger, Ngara will store all logging data to the Noise Cloud server.
To start a Noise Cloud session, simply select start using the on-board interface (Section 4.8.1). If a valid USB drive
is provided to Ngara, a log file containing status messages will be written.
Once completed, the Noise Cloud session may be stopped through the on-board interface (Section 4.8.2). This will
cause the data within the internal buffer to be moved to the Noise Cloud server (described as
flushing
). The
session is only complete once this final write has completed, do not remove power to the unit before hand.
During the final flushing stage, a count down of the number of records still left to be uploaded will be shown. Only
once all records are uploaded can the Noise Cloud session be considered as completed. This requires a valid internet
connection.

A Noise Cloud session can run independently of a USB logging session

Ngara currently requires a
writeKey
to be entered by the user.
This is generated through the Noise Cloud interface and is to be provided to Ngara as part of the Noise
Cloud configuration in the Remote Host.
See Section 5.4.8.
3.2.1 Communication
The Ethernet interface on the Ngara is used for all communications to the Noise Cloud server. This can be interfaced
through a modem for a completely remote installation, or to a local area network as available. The connection type
can be updated using the on-board interface (Section 4.4.3.6).
When configured to use a modem for connection, Ngara will interrogate the modem for the items shown on Table 10.
The result of interrogation can be viewed using the on-board interface via the status screen, for details see Section
4.9. If the modem has failed to register to the wireless network, a Bad Modem indication will be shown.
Table 7: Modem Status
Item Description
status
Current SIM status
signal
Radio signal strength
technology
Radio technology in use
registration
Wireless network registration status

If Ngara is configured to use a modem for connectivity, it will wait for valid network registration before
trying to contact the Noise Cloud server.
When configured to use a modem, but instead is incorrectly connected to a local area network, this
registration will never be found and all communications will appear to stop.
All values are recorded to the log file as they change.
3.2.2 Modem Power
During a Noise Cloud session (NC Session), Ngara is automatically configured to control the power to a modem via
it’s
AUX output. Power will be provided to the modem when the upload period is reached. Setting the upload period
can be carried out using the on-board interface, see Section 4.8.4.
Version — 25-7cd7566 Page — 17 of 80