User`s guide

3-26 Agilent 4155C/4156C User’s Guide Vol.2, Edition 6
Sampling Measurements
Defining Measurement Conditions
To Define Measurement Units
1. Press Chan key in the PAGE CONTROL key group.
2. Select CHANNEL DEF primary softkey.
3. In the MEASUREMENT MODE area, select SAMPLING secondary softkey.
4. In the VNAME column, enter a unique name for voltage variable. For example,
enter Vce for collector-emitter voltage. If channel does neither V force nor V
measurement, you can omit VNAME.
5. In the INAME column, enter a unique name for current variable. For example,
enter "Ic" for collector current. If channel does neither I force nor I
measurement, you can omit INAME.
6. In the MODE column, select the following softkey:
• V : voltage output (for SMU, VSU, and PGU).
V : grounded mode voltage measurement (for VMU).
• I : current output (for SMU).
• VPULSE : pulsed voltage output (for PGU).
• COMMON : circuit common (for SMU and GNDU).
• DVOLT : differential mode voltage measurement (for VMU).
7. In the FCTN column, select CONST secondary softkey for all source units.
8. In the DISCHARGE field, select ON secondary softkey to connect the discharge
resistor to VMU input, or OFF to disconnect the resistor. The discharge resistor
is used to prevent the VMU inputs from charge up in the idle state.
When DISCHARGE is ON, the discharge resistor is automatically connected to
the VMU input, and disconnected from the input in the measurement state.
VNAME and INAME
You can use VNAME and INAME in user function definitions or for analysis on the
GRAPHICS/LIST screens. These names must be 6 or less alphanumeric characters.
First character must be alphabet character.
To disable a unit
Move the pointer to the row of the unit, then select the DELETE ROW secondary
softkey. The settings in the row are deleted.