Impedance Measurement Accuracy at Four-Terminal Pair Port
Equation 1 shows the impedance measurement accuracy [%] at four-terminal
pair port of the Agilent 4294A, or measurement port of the 16048G/16048H.
Equation 1. Impedance Measurement Accuracy [%] at Four-Terminal Pair Port
Zs'
.
ꢁ Yo' |Zx|
ꢀ 100
E = Ep' ꢁ
(
)
|Zx|
Where,
EP' = EPL ꢁ EPBW ꢁ EPOSC ꢁ EP ±%]
YO' = YOL ꢁ KBW X KyOSC X (YODC ꢁ YO) ±S]
ZS' = ZSL ꢁ KBW X KzOSC X ZS ±Ω]
Yo, Ep, Zs: See Figure 3 on page 17.
Eposc ±%] =
1000
VmV
f
at oscillator level >500 mV
ꢁ
0.03 ꢀ
– 1
– 1
– 1
(
(
(
(
)
)
)
)
100
500
VmV
at oscillator level >250 mV,
0.03 ꢀ
≤500 mV
250
VmV
at oscillator level >125 mV,
0.03 ꢀ
≤250 mV
at oscillator level >64 mV,
≤125 mV
125
VmV
0.03 ꢀ
– 1
at oscillator level ≤64 mV
64
– 1 ꢀ (0.03 ꢁ EPBW
)
(V )
mV
Kyosc
=
at oscillator level >500 mV
1000
VmV
at oscillator level ≤500 mV
500
VmV
Kzosc
=
at oscillator level >500 mV
2
at oscillator level >250 mV,
≤500 mV
500
VmV
at oscillator level >125 mV,
≤250 mV
250
VmV
at oscillator level >64 mV,
≤125 mV
125
VmV
at oscillator level ≤64 mV
64
VmV
10
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