Setting Measurement Conditions

Before starting the measurement, you must set measurement parameters and sweep conditions depending on your measurement requirements. This section describes the setup procedure for the following four measurements.

  1. Frequency characteristics of |Z|-Ls-Q

  2. Oscillator level (current) characteristics of Ls-Q

  3. DC bias (current) characteristics of Ls-Q

 

Flow for Setting Measurement Conditions

The basic procedure for setting the measurement conditions is illustrated below:

Frequency Characteristics of |Z|-Ls-Q

Change the measurement conditions from the initial state of the E4991B:

Setup example for this measurement:

Parameter setting

Setup example

Initial state

Measurement parameters

Trace 1

|Z|

|Z|

Trace 2

Ls

θz

Trace 3

Q

Q

Display formats

Trace 1

Log

Linear

Trace 2

Linear

Linear

Trace 3

Linear

Linear

Measurement points

201 points

201 points

Sweep parameter

Frequency

Frequency

Sweep type

Log

Linear

Source mode

Current

Voltage

Oscillator level

1 mA

100 mV (2 mA)

Sweep range (frequency)

1 GHz to 3 GHz

1 MHz to 3 GHz

Presetting and Setting Measurement Parameters and Display Formats

  1. Preset the E4991B.

  2. Press Display > Num of Traces > 3.

  3. Press Meas > Trace 1 > |Z|.

  4. Press Format > Y-Axis > Log.

  5. Similarly, set Trace 2 > Ls with Y-Axis > Linear and Trace 3 > Q with Y-Axis > Linear.

Setting Measurement Points, Sweep Parameter and Sweep Type

  1. Press Sweep Setup > Points > 201.

  2. Press Sweep Setup > Sweep Type > Log Freq.

Setting the Source Mode and Oscillator Level

  1. Press Sweep Setup > Osc Level > Osc Unit > Current.

  2. Press Sweep Setup > Osc Level > Current Level > 1 > k/m.

Setting the Sweep Range (Frequency)

  1. Press Start > Start > 1 > G/n.

  2. Press Stop > Stop > 3 > G/n.

Oscillator Level (Current) Characteristics of Ls-Q

Change the measurement conditions from the initial state of the E4991B:

Setup example for this measurement:

Parameter setting

Setup example

Initial state

Measurement parameters

Trace 1

Ls

|Z|

Trace 2

Q

θz

Display formats

Trace 1

Linear

Linear

Trace 2

Linear

Linear

Measurement points

201 points

201 points

Sweep parameter

Oscillator level

Frequency

Sweep type

Linear

Linear

Source mode

Current

Voltage

CW frequency

100 MHz

1 MHz

Sweep range (AC current)

100 μA to 10 mA

80 μA to 10.02 mA

Presetting and Setting Measurement Parameters and Display Formats

  1. Preset the E4991B.

  2. Press Display > Num of Traces > 2.

  3. Press Meas > Trace 1 > Ls.

  4. Press Format > Y-Axis > Lin.

  5. Similarly, set Trace 2 > Q with Y-Axis > Linear.

Setting Measurement Points, Sweep Parameter and Sweep Type

  1. Press Sweep Setup > Points > 201.

  2. Press Sweep Setup > Sweep Type > Osc level > Osc Unit > Current.

Setting the Source Mode and CW Frequency

  1. Press Sweep Setup > Osc Level.

  2. Press Sweep Setup > CW Freq > 100 > M/μ.

Setting the Sweep Range (Oscillator Level)

  1. Press Start > Start > 100 > M/μ.

  2. Press Stop > Stop > 10 > k/m.

DC Bias (Current) Characteristics of Ls-Q (Option 001)

When Option 001 is installed in the E4991B, DC bias can be applied to the DUT. First, change the measurement conditions from the initial state of the E4991B.

Setup example for this measurement:

Parameter setting

Setup example

Initial state

Measurement parameters

Trace 1

Ls

|Z|

Trace 2

Q

θz

Display formats

Trace 1

Linear

Linear

Trace 2

Linear

Linear

Measurement points

201 points

201 points

Sweep parameter

DC bias (current)

Frequency

Sweep type

Linear

Linear

Source mode

Current

Voltage

Oscillator level

1 mA

100 mV (2 mA)

CW frequency

100 MHz

1 MHz

Sweep range (DC current)

100 μA to 50 mA

0 A to 0 A

Presetting and Setting Measurement Parameters and Display Formats

  1. Preset the E4991B.

  2. Press Display > Num of Traces > 2.

  3. Press Meas > Trace 1 > Ls.

  4. Press Format > Y-Axis > Lin.

  5. Similarly, set Trace 2 > Q with Y-Axis > Linear.

Setting Measurement Points, Sweep Parameter and Sweep Type

  1. Press Sweep Setup > Points > 201.

  2. Press Sweep Setup > DC Bias > DC Bias State  > ON.

  3. Press Sweep Setup > DC Bias > DC Bias Mode  > Current.

Setting the Source Mode, Oscillator Level and CW Frequency

  1. Press Sweep Setup > Osc Level > Osc Unit > Current.

  2. Press Sweep Setup > Osc Level > Current Level > 1 > k/m.

  3. Press Sweep Setup > CW Freq > 100 > M/μ.

Setting the Sweep Range (DC Bias)

  1. Press Start > Start > 100 > M/μ.

  2. Press Stop > Stop > 50 > k/m.