Acoustic Research Ngara, Руководство пользователя

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Ngara
User Manual

Using IP address “255.255.255.255” will cause Ngara to send broadcast messages to all network devices
The output data can only be set to only one of the 5 results that Ngara calculates, along with the optional raw data
sample values.
The raw data sample values sent will match the configuration set in the wave file configuration tab (Section 5.4.2),
thus may not always be 48 kHz.

Whilst the output of raw data is enabled, a session cannot be started as Ngara will not have enough
processing power to write the raw sample values to both USB and Ethernet.
Please contact Acoustic Research Labs for UDP message structures.

This feature is not available when operating in Industrial Noise Monitor mode
5.4.7 Advanced Configuration Options

Some of these configuration options are DEPRECATED and may be removed in future firmware releases
Advanced configuration options include-
• Simple Network Time Protocol (SNTP)
2
– DEPRECATED
When Ngara is connected to the internet, it can synchronise its clock with an external time server. This option
must be used with extreme care as very large time changes during a logging session may result in some loss
of data. ARL recommend using this setting only when Ngara is configured in a non-logging configuration, for
example, when Ngara is used solely to relay results via UDP.
Secondary server address may be left blank if not required.

v 7 . 06
onwards, Ngara supports variable SNTP refresh rates. These are set to pre determined values
using a provided sliding bar.
• Remote Server Logon
3
– DEPRECATED
Address of remote virtual private network server and authentication credentials.
• File Transfer Protocol Setup (FTP)
Ngara can share the contents of the USB drive operating as a FTP server. The server is only operational whilst
in standby mode as this ensures the drive remains ON and disk access is restricted to only FTP operations.
Restrictions-
• Usernames and passwords may only contain numbers and letters
• The FTP server was written to be compatible with the freely available “FileZilla” client

These configuration options are not available when operating in Industrial Noise Monitor mode
2
System time updates during a continuous logging session to Noise Cloud may prove problematic.
3
Noise Cloud preferred over VPN connection.
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