Mantracourt T24 User Manual page 32

This shows how the display would look if the band noise floor slowly crept up. The red trace is only visible on
channel 12 but other channels that were once OK (Having a very low minimum signal level) now have a viewable
level of minimum signal noise. A double-click on the planar chart would reset the peak and minimum calculations
so the minimum red trace would then follow the more recent higher noise floor.
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Mantracourt Electronics Limited T24 Telemetry User Manual