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Table 7 Synthesis of the main variables that described the LIGNOSTATION™ system

From: Changes in tree-ring wood density of European beech (Fagus sylvatica L.), silver fir (Abies alba Mill.), and Norway spruce (Picea abies (L.) H. Karst.) in European mountain forests between 1901 and 2016

Frequency of the sinusoidal signal produced by the high-frequency generator

Power of the sinusoidal signal produced by the high-frequency generator

Pressure of the high-frequency probe on the wood surface

X and Y resolution of the high-frequency probe

Spot measured by the tip of the high-frequency probe

Recording frequency of the signal received by the receiving electrode

10 MHz

50 mW

1 N

2/100 mm

20 µm x 20 µm

1 kHz