ATLAS North America Proprietary
Sea Scan ARC Scout MKII Operations Manual
1 of 1
Page: 59
Issue: 1.2.4
SCTM2-OPS
Operations Manual
11.1
EMI & Noise Interferance
The effect of system background noise (EMI) through inefficient grounding or placement of components
with high EMI outputs without proper shielding, too close to the system will cause the effective range of
the Scout MkII to be reduced. This is due to creating an environment where the sonar returns are not high
enough to be above the background levels. This impacts the higher frequencies (1200 kHz, 1800 kHz), more
as they have a higher attenuation per meter than the lower frequencies (300 kHz, 600 kHz, 900 kHz), when
looking at real-world data.
Note: The typical minimum background noise range for a delivered system, during bench testing is 20 - 30
counts.
To determine the amount of EMI and Noise Interference the system is receiving while installed in the
platform, perform the following:
CAUTION: Do not connect the MkII Interconnect Cable to any unit until confirming that one
device is configured as a Dual Frequency Master and the second device is configured as a Dual
Frequency Slave. Damage to the device interface may occur if they are not properly configured.
1. Uninstall the Scout MkII system from the host platform
2. Power the Scout MkII units from an external power supply
a. Use the same voltage as the Host Platform supplies the unit(s).
3. Connect the Scout MkII unit to a Windows PC via the Ethernet Cable.
4. Navigate to the Sonar Control Window as per this manual.
5. Using the Sonar Control Window, set the following options:
a. Enable
b. Enable Transmit
Channel
On/Off
Range
Range Delay
0
On
50.0 (25.0)
49.0 (24.0)
