www.stationaudiocontrol.eu Open in urlscan Pro
35.242.251.130  Public Scan

Form analysis
0 forms found in the DOM

Text Content

 


 * Home

 * Buy

 * Contact

 * Downloads

 * More


Use tab to navigate through the menu items.



THE NEW STANDARD FOR MONITORING AND SURVEILLANCE OF PA SPEAKER NETWORKS

Learn More



DO YOU KNOW IF YOUR SPEAKER SYSTEM REALLY WORKS?

The Station Audio Control (SAC) is specifically developed for monitoring and
surveillance of PA speaker networks, for example on railway station facilities.
It enables measuring of audio levels from both the line inputs and amplifier
outputs of  amplifiers. Deviations from preset values are signaled and reported,
e.g. to a server via an SNMP trap.


MEASUREMENTS

 * Automatic monitoring of amplifiers and speakers.

 * High and low impedance measurements of loudspeaker system.

 * Automatic calibration.

 * Automatic noise measurements.





TIME SCHEDULING

 * Automatic time scheduled level adjustments.




I/O

 * 4 channels.

 * 4 analog audio inputs.

 * 4 analog audio outputs.

 * 4 amplifier inputs.

 * 4 amplifier speaker outputs.

 * Network connection.





CONTROL

 * Frontpanel control.

 * Remote control.

 * HTML5 webpage.

 * SNMP alerts and messages.

 * NTP server.

 * Different user logins and rights.


 



MUST HAVE FOR:
GENERAL BROADCASTING SYSTEMS, RAILWAY STATIONS, STADIUMS, PUBLIC BUILDINGS,
SCHOOLS, ETC.




The Station Audio Control (SAC) is specifically developed for monitoring and
surveillance of PA speaker networks, for example on railway station facilities.
It enables measuring of audio levels from both the line inputs and amplifier
outputs of (100 Volt) amplifiers. Deviations from preset values are signaled and
reported, e.g. to a server via an SNMP trap.

Additionally, impedances of speaker networks are checked as to whether these are
still within the permitted margin. A maximum of 4 speaker networks, plus
associated amplifier inputs & outputs, can be connected. The impedance
measurement ranges from 2Ω to 5000Ω.

During the installation of the system, a calibration step of the speaker network
should be performed. In this step, the impedance of the network is measured and
stored as a reference value. At every subsequent measurement of the network, the
result is compared with this reference value. A deviation of more than 10% is
signaled.

An automatic measurement of the impedance of the network can be done, once a day
and at a preset time; preferably at night, as this is when there is the least
amount of traffic on the tracks and platforms. Noise affects the outcome of the
measurement.

The measurement of the speaker network is not audible.

During the measurement, the speaker network is probed 4 times at intervals of X
seconds. The measurement itself takes 1 second. The interval time X is
adjustable from 5 to 60 seconds.

If two or more of the 4 values deviate 10% or more from the stored (reference)
value, the measurement is repeated. The interval time between repeats is 30
seconds.

The measurement is repeated a maximum of 3 times. If the deviation still exceeds
the limit of 10%, a notification is sent and the measurement is stopped.

If the value is far too high (open connection) or far too low (short circuit),
the message “TOO HIGH” or “TOO LOW” will appear on the display on completion of
the measurement. The web page will show this status with the values "high" or
"low".

 

A second check done by the device is whether the amplifier is still functioning
properly. This proceeds in the following way:

The paging signal is received at line level on an XLR connector. It passes and
leaves the device via a loop-through the circuit. This enables the device to
detect whether audio is "in-coming". We follow the same procedure to check the
output of the amplifier. It is verified that during a paging message, audio is
present on the output of the amplifier. If not, a notification is sent.
Similarly, if the output level of the amplifier deviates from the calibrated
value, a message will appear.

 

In order to log all notifications at the correct time, the internal clock of the
SAC must be synchronized on start-up, preferably to the network time server.
Thus, all devices will run in sync.

The internal clock of the SAC continues to run for several weeks, if the device
is non powered.

The status and audio levels of the four sources can be read on the device
display. It also offers a menu, for adjusting settings.

Furthermore, you can log into the device with a web browser to configure the
system via five web pages.

The core software of the SAC is Linux. A drawback of this OS is that in the
event of a power loss, the latest status messages and notifications are not yet
written into the logs. To prevent this, a battery has been placed in the SAC
that ensures that in the event of a power failure, the OS is properly shut down
and (cached) data is saved. The battery is of Lithium-Metal type and it has an
expected lifespan of 8 to 10 years. If the battery voltage drops below a limit,
this is signaled via SNMP and in the log.

Since the SAC is solid-state (no fan), it is virtually maintenance free.


MUST HAVE FOR:
GENERAL BROADCASTING SYSTEMS, RAILWAY STATIONS, STADIUMS, PUBLIC BUILDINGS,
SCHOOLS, ETC.


WHERE TO BUY
STATION AUDIO CONTROL?

We have a worldwide network of excellent professional local dealers who can
provide you with more information about the SAC sales and installations.

Find Local Dealer

+32 (0)9 396 76 44 

info@stationaudiocontrol.eu
support@stationaudiocontrol.eu

 * Home
 * Buy
 * Contact
 * Downloads

Socials:

 * 
 * 

© by Station Audio Control