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What are the differences between the E4980A and 4284A?
Most of the E4980A functions are compatible with the 4284A's. Since some enhancements and updates of functionality are incorporated in the E4980A, there are primary differences summarized in the table.

FAQ 2014-04-07

“服务”(Service)菜单项下“升级固件”(Update Firmware)键未显示是什么原因?

FAQ 2011-10-07

当直流偏置电流超过一定限度时,为什么 42841A 会关闭,而且在 E4980A/ 4284A 上还会显示“E25: DC bias I source overload”或“E26: DC bias I sink overload”错误消息?
42841A 输出的直流偏置电流不能超出由被测件直流电阻和直流输出电压最大极限值决定的电流限度。

FAQ 2011-04-21

How wide range of resistivity can the 4339B measure when used with the 16008B?
The 4339B can measure surface resistivity up to 7 x 1017 Ω and volume resistivity up to 8 x 1018 Ω-cm, but it depends on the electrodes of the 16008B used.

FAQ 2010-07-02

Does typical permittivity measurement accuracy includes all the uncertainties due to the E4991A with opt 002, 16453A and MUT insertion conditions?
Yes. All the uncertainties are included in the typical measurement accuracy.

FAQ 2010-07-02

How is measurement accuracy calculated when the 42841A is used with the 4284A, 4285A or E4980A?
The measurement accuracy is the sum of the measurement instrument accuracy and additional error produced when the instrument is used with the 42841A and bias current test fixture.

FAQ 2010-07-02

Do the coaxial Short and 50 Ω Load terminations for the 42941A have accuracy specifications?
No, both the coaxial Short and 50 Ω Load standard terminations for the 42941A do not have accuracy specifications.

FAQ 2010-07-02

4287A 进行接触点检测时显示的 Rdc 测量值不准确,怎样做才能提高其准确度?
执行开路/短路/负载校准和开路/短路补偿。

FAQ 2010-01-26

与 Keysight 85070E 介电探头套件连用时,各种探头的频率限制及其原因是什么?
通过 3 GHz E4991A 阻抗分析仪,85070E 介电探头选件 020、030 和 050 可拥有最大的频率。

FAQ 2009-06-26

Is the Rdc measurement accuracy of the 4287A better than that of the 4286A?

FAQ 2009-03-13

What is the output impedance of the 4287A?
Nominal output impedance is 50 ohms.

FAQ 2009-03-11

What benefits can I get by replacing the 4286A with the 4287A?

FAQ 2009-03-11

What is the output impedance of the 4285A?

FAQ 2009-01-14

Is the accuracy of the impedance measurement specified when the 4395A/4396B Option 010 is used with the 87512A?
No, the accuracy of the impedance measurement values obtained by using the 4395A/4396B with the 87512A is not specified.

FAQ 2008-11-16

Can the spectrum analyzer mode of the 4395A display noise level below 0.0001 µV / sqrt (Hz) in noise measurement mode?
No, the 4395A can't display noise level below 0.0001 µV / sqrt (Hz) in noise measurement mode.

FAQ 2008-11-16

What does the Input Impedance in Table 11-24 of E4980A User's Guide and Table 39 of E4980A data sheet mean and how should it be applied?
The Table 11-24 and Table 39 describe input impedance of DC bias current monitor.

FAQ 2008-11-12

What is the signal source output impedance of the 4263B?
The signal source output impedance is 100 ohms ±10% on the 10 ohms and higher impedance measurement ranges.

FAQ 2008-09-25

What is the output impedance of the E4991A?

FAQ 2008-09-11

What is the signal source output resistance of the 4339B?
The output resistance of DC test voltage source is 1 k ohms ±10 %.

FAQ 2008-09-11

What is the test signal output impedance of the 4294A?
The source output impedance of the 4294A is 25 ohms (nominal value).

FAQ 2008-09-11

Keysight 16065A 偏置电压测试夹具的最大直流电流技术指标是多少?
16065A 没有规定最大直流偏置电流。然而,在输入阻抗为 100 kΩ 时...

FAQ 2008-08-31

Why are both absolute accuracy and relative accuracy specified for the E4980A?
Since the measurement accuracy (relative accuracy) of the E4980A is as high as it is comparable with the uncertainty of calibration standards, the absolute accuracy of the E4980A depends on the calibration standards used.

FAQ 2008-06-11

How is measurement accuracy of the E4980A specified when ALC function is set to ON?
Find the test signal level setting in ALC Off mode where the applied signal voltage or current across the DUT is equal to ALC setting value. Then calculate accuracy at this test signal level setting as follows:

FAQ 2008-06-11

Why are 4339B measurement values unstable when measuring resistance above 100 GΩ with the 16117B or 16118A test fixture?
Resistance above 100 GΩ is beyond the measurable range of the 16117B/16118A.

FAQ 2008-06-11

Why doesn't the 4287A necessarily display Rdc values over 100 kilo-ohms in Calibration Wizard/Dialog window when open termination is connected?
The measurement range for the DC resistance function of the 4287A is 0.1 ohms to 100 ohms.

FAQ 2008-06-11

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