B&K Precision 886 - Manual User Manual
Page 80

77
(d) WRONG 4T CONNECTION
H
POT
DUT
(b) BLOCK DIAGRAM
(a) CONNECTION
(c) TYPICAL IMPEDANCE MEASUREMENT RANGE (£[)
5T
1m 10m 100m 1
10
1K 10K 100K 1M
100
10M
H
CUR
DUT
V
A
DUT
V
A
L
POT
L
CUR
Figure 3.4
4-Terminal Path (4TP)
4-Terminal Path resuelve el problema causado por la
inductancia de la punta de prueba. 4TP usa 4 cables coaxiales
para la trayectoria de corriente y el cable sensor de voltaje
(Figura 3.5). La corriente de retorno fluye tanto por el cable
coaxial como por el blindaje. Por tanto, el flujo magnético
generado por el conductor interno cancelará el flujo magnético
generado por el conductor externo (blindaje). La conexión 4TP
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