18
Additional specifications (Agilent 4284A only)
When measured value < 10 mΩ, |Z|, R, and X accuracy, which is described on page 14,
is given as following equation.
|Z|, R, and X accuracy:
•±[(Ka + Kc) x 100] (%)
Where
• Ka = Impedance proportional factor (refer to Table 2)
• Kc = Calibration interpolation factor (refer to Table 1)
Measurement accuracy (Agilent 4285A only)
Accuracy is specified for the following conditions:
1. Warm up time: ≥ 30 minutes
2. Ambient temperature: 23 °C ±5 °C
3. Test signal level voltage: 0.2 Vrms to 1 Vrms
4. Test cable correction completed
5. Open and short corrections have been completed
6. D ≤ 0.1 for C, L, X and B measurements
Q ≤ 0.1 for R and G measurements
7. For test frequencies above 10 MHz and DUT impedance ≥ 5 kΩ, the test signal
level must be between 0.5 Vrms and 1 Vrms
These accuracies are absolute and include the calibration uncertainties of standards.
Refer to the operation manual for additional setup conditions.
Accuracy equations
|Z|, |Y|, L, C, R, X, G and B accuracies are given as:
±(A
n
+ B) (% of reading)
where: 1. A
n
is the accuracy equation as specified by Figure 2 and
Table 3. A
n
ranges from A
1
to A
8
.
2. B is the test cable length factor in Table 5.
D accuracy is given as:
±[A
e
/100] (absolute D value)
Note: A
e
= (A
n
+ B)
Q accuracy is given as:
±[(Q
x
2
x D
e
)/(1 ](Q
x
x D
e
)] (absolute Q value)
Note: Specification valid only when Q
x
D
e
< 1. Q
x
is the measured
value of Q. D
e
is the computed D accuracy.
Specifications
Continued from page 17
Specifications continued on page 19
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