Kongsberg EM 712 Maintenance Manual page 21

RX noise level
This test measures the average isotropic spectral noise level for each receiver
channel (in dB rel 1 μPa/Hz) for different frequency bands. The receiver directivity
index, the transducer sensitivity and the filter bandwidth is used to convert to
isotropic spectral noise level. On a quiet ship away from noise sources, the noise
level should normally be below 45 dB.
RX noise spectrum
This test measures the isotropic spectral noise level for each receiver channel as
done in the RX noise level test. The noise spectrum level is displayed for small
frequency bands for groups of 32 channels. In addition the average level for all
channels are displayed. This spectrum test can be used to search for external noise
sources.
Software date and versions
This test presents the software date and versions for the system components.
System information
This test acquires information needed (serial numbers, software versions, BIST
results etc.) for a status report.
Save tests and open folder
Select
Save tests and open folder
Clear
Select to delete the tests already run.
Clear
PU System test result
All the tests will be listed as they are done.
Time
The time the test was run showing as yyyymmdd-hhmmss.
Result
The result showing as Passed or Failed.
Description
A short description of the test. Select the description or the text file to get more
details.
451106/B
to save the test results as a text file.
Troubleshooting
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