Gemini 720i Product Manual page 57

Seanet Pro Operation
Modify Network Address
Once the Gemini LAN is enabled and a Gemini Sonar connected and displayed in the Seanet
Setup Node Table click on Setup in the Action column to open the Gemini Cfg Setup
dialog.
Figure 7.3.
Gemini Cfg Setup
Velocimeter Mode
Ping Setup
VDSL Rate Adaption
Document: 0685-SOM-00001, Issue: 11
Set to 'Auto' to apply the in-built velocimeter speed of sound
calculation to the sonar data. Set to 'Manual' to revert to a fixed
speed of sound. This fixed speed of sound is the manual V.O.S.
(Velocity Of Sound) setting configured in the Environment dialog
from within Seanet Pro.
The two modes of operation are Triggered and Continuous.
In Triggered mode the Gemini will be sent continual triggers
where one trigger will instruct the Gemini to ping once. Each time
Seanet receives data for the current scan, it will respond and send
the next trigger to the Gemini to instruct it to perform the next ping.
This turnaround is half duplex in nature. In Continuous mode,
Seanet Pro sends one command at start-up which instructs the
Gemini Sonar to ping continuously. For both modes an inter-ping
time delay is also sent to the Sonar to control the scan update rate.
This InterPing Period is set in the Setup dialog accessed
through the Tools menu in Seanet Pro.
The Seanet Pro software allows three different settings to be
applied to the VDSL link, to cope with different levels of electrical
noise experienced by the cable to the Sonar. The dropdown menu
allows selection of 'Normal', 'Medium Noise' and 'High Noise'.
Note
Only change VDSL
Rate
communicating with the Gemini Sonar. Whenever a Medium
High Noise setting is selected, on initial startup of the Gemini, the VDSL
communications will take several seconds to find it's optimum rate. During this
period of rate adaption, the top-left of the Sonar screen will indicate the status
text Acquiring... (in red text).
unique Sonar ID, Firmware Version, broadcasting Sonar
IP Address and Subnet Mask.
The Sonar IP Address and Subnet Mask should be in
the same range as the Computer IP Address and Subnet
settings. To program a different Sonar IP Address and/or
Subnet Mask into the selected Gemini Sonar, change the
values in this panel and then click 'OK' on the main form
to upload these changes into the Sonar.
Adaption if difficulties are being experienced
57
Gemini Imaging Sonar
Noise or
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