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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

Service (服務) 功能表下方不會顯示 "Update Firmware" (韌體升級) 鍵,是什麼問題?
Service (服務) 功能表下方不會顯示 "Update Firmware" (韌體升級) 鍵,是什麼問題?

FAQ 2011-10-07

為什麼當直流偏壓電流超過一個特定值時,Keysight 42841A會關機,並在E4980A/ 4284A上顯示錯誤訊息 "E25: DC bias I source overload”,或 "E26: DC bias I sink overload"?
Keysight 42841A無法輸出大於由待測裝置的直流電阻,以及直流輸出電壓的最大限制值,計算所得的直流偏壓電流。

FAQ 2011-04-21

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

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

4338可以測量的最小電阻是多大?分辨率是多少?
4338B有傚測量的最小值是10微歐姆(10 micro-ohms)。 顯示分辨率是0.1微歐姆(0.1 micro-ohms)。

FAQ 2010-05-14

How to calculate the accuracy for U1731B/U1732B Inductance Measurements?
The accuracy is calculated using the formula in the data sheet...... The Example......

FAQ 2010-05-05

How to calculate the accuracy for U1731B/U1732B Capacitance Measurements?
The accuracy is calculated using the formula in the data sheet...... The Example......

FAQ 2010-05-03

如果 Keysight 4287A 顯示的 Rdc 量測值不準確時,需採取那些步驟以便執行適當的 Rdc 量測,並進行連接點檢驗?
執行開路/短路/負載校驗和開路/短路補償。

FAQ 2010-01-26

搭配 Keysight 85070E 介電探棒套件使用的各種探棒,有什麼樣的頻率限制?理由何在?
Keysight 85070E 介電探棒選項 020、030 與 050,透過 3 GHz 的 Keysight E4991A 阻抗分析儀,可擁有最大頻率。

FAQ 2009-08-11

How to calculate the accuracy for U1731A/U1732A Capacitance Measurements?
The accuracy is calculated using the formula in the data sheet...... The Example......

FAQ 2009-07-16

How to calculate the accuracy for U1731A/U1732A Inductance Measurements?
The accuracy is calculated using the formula in the data sheet...... The Example......

FAQ 2009-07-16

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

How accurately does the 4338B measure high resistance?
The 4338B accuracy in high resistance measurement is degraded because the maximum measurement range is limited to 100 k ohms.

FAQ 2008-11-11

What is the signal source output impedance of the 4338B?
The signal source output impedance is 1 ohm +/- 0.2 ohms (not specified).

FAQ 2008-11-11

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 output impedance of the E4991A?

FAQ 2008-09-11

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