Agilent Technologies 4294A Operating Manual page 340

Specifications and Supplemental Performance Characteristics
Basic Characteristics
G accuracy
NOTE Dx: measurement value of D.
Qx: measurement value of Q.
Da: measurement accuracy of D.
Impedance Measurement Accuracy at Four-terminal Pair Port
Equation 10-1 shows the impedance measurement accuracy [%] at the four-terminal pair
port of the Agilent 4294A or at the measurement port of the 16048G, 16048H.
Equation 10-1 Impedance Measurement Accuracy [%] at four-terminal pair port
Where,
E
P
Y
O
Z
S
Yo, Ep, Zs: see Figure 10-3 on page 340.
E
332
£ 10 (D ³ 0.1)
at Q
x x
> 10 (D < 0.1)
at Q
x x
> 0.1
at D
x
£ 0.1
at D
x
Z
æ
-------- -
E = E ' +
è
P
Z
' = E + E + E +
PL PBW POSC
´ ´ (
' = Y + K Ky
OL BW OSC
´ ´
' = Z + K Kz Z
SL BW OSC
[%] =
posc
at oscillator level > 500 mV
at oscillator level > 250 mV,
£ 500 mV
at oscillator level > 125 mV,
£ 250 mV
2
´ ( ) 100 ¤
Q E 1 + D
x x
------------------------------------------------------------ -
±
+ -
´ ( ) 100
1 Q E 1 + D
x x
2
´ ¤
Q E 100
x
± --------------------------------------
+ -
´ ¤
1 Q E 100
x
2
1 + D
x
-------------------- [%]
± E ´
D
x
[%]
± ¤
E D
x
'
ö
S
× ´
+ Y ' Z 100
ø
O X
X
[%]
E
P
[S]
)
Y + Y
ODC O
[W]
S
1000
æ ö
´ ----------- - 1 -------- -
0.03 – +
è ø
V 100
mV
500
æ ö
´ --------- - 1
0.03 –
è ø
V
mV
250
æ ö
--------- - 1
0.03 ´ –
è ø
V
mV
¤
f
Chapter 10