Measurement Range - Agilent Technologies 4288A Programming Manual

Information for Replacing 4278A with 4288A
Functional Comparison and GPIB Command Correspondence

Measurement range

Functional comparison
The following table shows the allowable measurement ranges for the 4278A and the
4288A.
At the measurement frequency of 1 kHz, the 4288A provides almost perfect upward
compatibility with the 4278A. The measurement ranges that can be set for the 4278A,
except for the 100 µ F range, can also be set for the 4288A. If you select only these
measurement ranges, the 4288A provides the same level of accuracy as the 4278A.
However, it is recommended that you select the most appropriate measurement range for
high-accuracy measurement.
At the measurement frequency of 1 MHz, the 4288A provides almost no compatibility with
the 4278A, so you cannot specify the same measurement ranges except for the 1 pF range.
Measurement frequency: 1 kHz
4278A
Output
Range
resistance
100 Ω
100 pF
100 Ω
1 nF
100 Ω
10 nF
20 Ω
100 nF
1 µ F 1.2 Ω
10 µ F 1.2 Ω
100 µ F 20 Ω
Differences in usage of GPIB commands
Correspondence Measurement range is set for both 1 kHz
between the and 1 MHz frequencies. Different setup
measurement commands are provided for each allowable
frequency and the measurement range at both 1 kHz and
measurement range 1 MHz frequencies.
214
4288A
Output
Range Range
resistance
20 Ω
100 pF 1 pF
20 Ω
220 pF 2 pF
20 Ω
470 pF
20 Ω
1 nF 4 pF
20 Ω
2.2 nF
20 Ω
4.7 nF 8 pF
20 Ω
10 nF
20 Ω
22 nF 16 pF
20 Ω
47 nF
20 Ω
100 nF 32 pF
1.2 Ω
220 nF
1.2 Ω
470 nF 64 pF
1 µ F 1.2 Ω
2.2 µ F 1.2 Ω
128 pF
4.7 µ F 1.2 Ω
10 µ F 1.2 Ω
256 pF
512 pF
1024 pF
4278A
Measurement frequency: 1 MHz
4278A 4288A
Output
Range
resistance
20 Ω
1 pF
20 Ω
2.2 pF
20 Ω
4.7 pF
20 Ω
10 pF
20 Ω
22 pF
20 Ω
47 pF
20 Ω
100 pF
20 Ω
220 pF
20 Ω
470 pF
20 Ω
1 nF
20 Ω
4288A
Measurement range is set for both 1 kHz
and 1 MHz frequencies. If a change in the
measurement frequency conflicts with the
measurement range setting, an acceptable
range is automatically selected.
Appendix B
Output
resistance
20 Ω
20 Ω
20 Ω
20 Ω
20 Ω
20 Ω
20 Ω
20 Ω
20 Ω
20 Ω