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Siemens ACUSON Freestyle User Manual Page 117

Diagnostic ultrasound system.
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The wireless Average Noise Level (ANL) is displayed in real-time. Examples are provided
above. Values above the 0.0 level reflect an increased possibility of noise being introduced into
the image because of a compromised wireless link. The upper range is approximately 4.0 dB.
For best results position the probe and system such that ANL is not above 1.0 dB.
Always monitor the noise levels on the console. See the following table for a description of the
conditions.
Average Noise Level Indicator Conditions
ANL decibels (dB)
Condition Expectations
0.0 to 0.3
Expect very reliable wireless probe performance without noise being
introduced because of wireless link quality.
0.4 to 1.0
Very reliable wireless probe performance, but there is a possibility of low
levels of noise being introduced into the image because of a compromised
wireless probe link. This noise is typically imperceptible.
Reorient the probe/console to within 3 meters of each other, in a line-of-
sight, without obstructions between the probe and the console.
Signal
There is an increased possibility of noise being introduced to the image
less than 1.0
because of a compromised wireless probe link.
Reorient the probe/console to within 3 meters of each other, in a line-of-
sight, without obstructions between the probe and the console.
No signal
The wireless signal has been lost, so the image screen is blank. A
message appears on the screen informing you of this condition and the
ANL display is also blank.
Reorient the probe/console to within 3 meters of each other, in a line-of-
sight, without obstructions between the probe and the console.
Freestyle User Manual
ACUSON
Wireless Probes
6-9

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