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User Manual
8300 MkII Sound Reception System
5 Operating Instructions
5.1 Operational Modes
The P-8300 MkII display unit has four different operational modes. The volume and lighting can be adjusted.
To switch between modes, do the following:
•
Press and hold the control button for 5 seconds.
NOTE:
Continuing to hold the button will advance you into the next mode. The mode will change for every additional 5 seconds.
5.1.1 Normal Mode
When the display unit is first started, it will start in normal mode. When in this mode, the unit will idle until a horn signal is
detected. Detected horns will play on the speaker and indicate the direction of the source of the signal.
The speaker will play the detected horn at a consistent level regardless of the level of the input. This level can be adjusted
using the volume control. Differences in the level of the input can be perceived in the clarity of the signal compared to the
background noise.
As a reference, the expected level for a whistle with a fundamental frequency of 120Hz, with a level of 143dB
(SPL) within 1/3 octave at 1 meter, from 2 nautical miles should be around 65-70 dB(A) at the listening post. The
second volume setting (two notches clockwise when muted) will result in a similar level in dB(A) produced by the
display.
Within the first 3 seconds of detection, an 80-degree arch will light up in orange while the center of the arch is lit in red. After
3 seconds, only the red light remains active. Multiple indications can be active at once. The indication pointer will remain for a
configurable amount of time (7 seconds by default) after the detection is finished. The indication pointer configuration time can
be altered within the web interface.
The light behind the control button is off when the unit is in this mode.
Figure 17: Normal mode, idle
