
Agilent B1500A/B1505A Programming Guide, Edition 11 2-29
Remote Mode Functions
Measurement Modes
Capacitance Data
Capacitance data is given by the calculation. The calculation depends on the
operation mode set by the QSC command. There is two operation modes, Normal
and 4155C/4156C compatible.
Normal Mode Normal operation mode for the B1500A
• Capacitance Data
At each sweep step, the capacitance data is calculated by using the following
formula.
C = (I - Leak) × cinteg /(V-V
0
)
The QSL0,0 command disables the leakage current compensation and the
leakage current data output. Then the leakage current measurement is not
executed. The capacitance data is calculated by using the following formula.
C = I × cinteg /(V-V
0
)
• Leakage Current Data
At each sweep step, the leakage current data is calculated by using the following
formula. This data output is enabled by the QSL1,0 or QSL1,1 command.
Leak = IL
0
+ (IL - IL
0
) × (V
avg
-V
0
)/(V-V
0
)
4155C/4156C
Compatible Mode
Operation mode that provides a good compatibility with the measurement results by
the 4155C/4156C
• Capacitance Data
At each sweep step, the capacitance data is calculated by using the following
formula.
C = (I - Leak) × cinteg /(V-V
0
)
The QSL0,0 command disables the leakage current compensation and the
leakage current data output. Then the leakage current measurement is not
executed. The capacitance data is calculated by using the following formula.
C = I × cinteg /(V-V
0
)
• Leakage Current Data
At each sweep step, the leakage current data is calculated by using the following
formula. This data output is enabled by the QSL1,0 or QSL1,1 command.
Leak = IL + τ × (IL
0
- IL)/(2 × cinteg), where τ is the time for electrical charge
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