Measurement Principles
R&S
®
RT-ZS60
29
User Manual 1418.7342.02 ─ 04
4.1.2
Connection Inductance
The connection inductance L
con
is caused by connecting the probe to the DUT. In
contrast to the probe-specific bandwidth, the connection inductance mainly
depends on the selected type.
The connection inductance:
●
Increases with the length of the connection and the size of the resulting loop
area A.
●
Reduces the usable bandwidth and causes ringing with signals having a short
rise time, due to a series resonance with the input capacitance.
●
Must be as small as possible (short lead length) to maintain high signal integ-
rity.
●
Long leads on the signal input are especially problematic.
con
in
con
resonance
con
L
BW
C
L
f
A
L
1
to
al
proportion
2
1
≈
to
al
proportion
Figure 4-4: Ground connection and connection inductance
Signal Integrity of the Transferred Signal
