Specifications

Shielded 4T extension
The outer shielding conductors of coaxial cables are interconnected at each end of the cables, as
shown in Figure 3-14. The shielded 4T extension can be used for accurate low-impedance measure-
ments. However, when applied to high-frequency measurements (typically above 3 MHz), this
extension method produces greater measurement errors than the shielded 2T extension because the
error sources at high frequencies are complicated. The length of the shielded 4T extension in the
high frequency region should be made as short as possible.
Figure 3-14. Shielded 4T extension
Table 3-3 summarizes the extension techniques and their applicable impedance/frequency range.
Table 3-3. Summary of cable extension
(a) Schematic diagram
DUT
H
p
H
c
L
c
L
p
LCR meter
Test cables
(16048A etc.)
Extended cables
H
p
H
c
L
c
L
p
LCR meter
(b) Connection image
Connector plate
(Part number: 16032
-60001)
Coaxial cables
Test cables
3-14
Typical measurement frequency
Measured impedance 100 kHz and below Above 100 kHz
Low
(Typically 100 Ω and below)
4TP - 4TP
Medium
(Typically 100 Ω to 100 kΩ) 4TP - 4TP
4TP - Shielded 4T
High
(Typically 100 kΩ and above) 4TP - Shielded 2T