Setting Source

• Setting Fixed Frequency at OSC/DC Bias Sweep

• Selecting Unit for Oscillator Level (Voltage or Current)

• Setting Oscillator Level

• Controlling Oscillator Level (ALC)

• Setting and Applying dc Bias

Other topics about Setting Measurement Conditions

Setting Fixed Frequency at OSC/DC Bias Sweep

Follow the steps below to specify a fixed frequency for the signal source when the sweep parameter is any item other than frequency (i.e., oscillator level or dc bias).

1. Press Sweep Setup.

2. Press CW Freq and input the desired fixed frequency value.

Selecting Unit for Oscillator Level (Voltage or Current)

1. Press Sweep Setup > OSC Level to display the oscillator level settings menu.

2. Press OSC Unit and select your desired oscillator level by toggling between the Voltage|Current option.

   1. The unit specified for oscillator level through the steps above will be applied to the unit for oscillator level sweep (voltage level sweep or current level sweep) and the unit for the fixed oscillator level when sweeping parameters other than oscillator level. The setting for the unit will not affect the setting for the signal source level monitoring function, since the function displays both voltage and current levels.
   2. Settings of the unit for oscillator level are commonly applied to both traces. Hence, you do not need to select and verify an active trace before setting.

Setting Oscillator Level

1. Press Sweep Setup > OSC Level to display the oscillator level settings menu.

2. The Voltage Level or Current Level is enabled depending on your oscillator selection. For example, if you have selected OSC Unit > Voltage, then Voltage Level is enabled. then, press the Voltage Level and input the desired voltage level value.

Controlling Oscillator Level (ALC)

1. Press Sweep Setup > OSC Level > ALC to display the ALC level settings menu.

2. Press ALC > ON|OFF to toggle between On or Off the ALC level.

3. Press Max Iteration and input the desired maximum iteration value, between 2 and 10.

4. Press Target % and input the desired value, between 0.05 to 10.

Setting and Applying dc Bias

Follow the steps below to apply dc bias to DUT, regardless of whether you plan to sweep by dc bias.

Selecting dc bias mode

1. Press Sweep Setup > DC Bias > DC Bias Mode to display the DC bias mode selection options.

2. Select one of the DC bias mode, either Voltage or Current.

Selecting constant mode

1. Press Sweep Setup.

2. Press DC Bias > Constant Mode and toggle between the ON|OFF selection to turn ON/OFF the constant mode.

Setting fixed dc bias level

When the sweep parameter is not dc bias, select the dc bias mode and then follow the steps below to set dc bias level.

1. Press Sweep Setup > DC Bias to display the DC bias selection options.

2. The Voltage Level or Current Level is enabled depending on your dc bias mode selection. For example, if you have selected DC Bias > DC Bias Mode > Voltage, then Voltage Level is enabled. then, press the Voltage Level and input the desired voltage level value.

Setting limits for dc voltage

When constant voltage or current is selected for the dc bias mode, follow the steps below to set limit values for the voltage (upper and lower limits) in order to protect the DUT being measured.

To set the maximum limit voltage:

1. Press Sweep Setup.

2. Press DC Bias > Max Limit Voltage and input the maximum limit value.

To set the minimum limit voltage:

1. Press Sweep Setup.

2. Press DC Bias > Min Limit Voltage and input the minimum limit value.

   • The dc voltage limit values specified by the Max Limit Voltage or Min Limit Voltage key take effect when the dc bias mode is constant voltage or current. The setting for these values is disabled when the dc bias mode is set to non-constant.

Setting dc bias range to 1 mA

Set the dc bias range before turning the dc bias ON. The dc bias range is set to optimize the dc current given to the impedance measurement circuit. This setting affects the accuracy of the impedance measurement regardless of which dc bias mode is selected or whether dc bias is turned ON or OFF. Normally, maximum accuracy can be obtained by setting the dc bias range as narrow as possible. An initial dc bias range of 1 mA is recommended for the first measurement when dc bias is applied.

1. • When you do not apply dc bias, always set the dc bias range to 1 mA, which is the preset setting. Keeping this setting is especially important when you run through the sequence of applying dc bias, turning off dc bias, and then performing a measurement.

2. Press Sweep Setup.

3. Press DC Bias > Meas Range and set the dc bias range to 1 mA.

   • Always set the dc bias range to 1 mA when you measure without applying dc bias.

Turning dc bias ON or OFF

1. Press Sweep Setup.

2. Press DC Bias > DC Bias State and toggle between the ON|OFF selection to turn ON/OFF the dc bias state.  

   • Turning dc bias ON displays DC ON at the instrument bar in the lower right area of the screen.

   •  

Optimizing dc bias range

1. Press Sweep Setup.

2. Press DC Bias > Meas Range and select the desired the dc bias range to within 1mA|10mA|100mA selection options.

DC bias delay

You can have a delay after DC bias is applied.

1. Press Sweep Setup.

2. Press DC Bias > DC Bias Delay and input the delay time value.

DC bias OFF during Hold state

DC bias source can be turned off during hold state. This status is kept after the preset.

1. Press System.

2. Press  Meas Setup > DC Output @Hold and toggle between ON and OFF.