User`s guide

4-6 Agilent 4155C/4156C User’s Guide Vol.2, Edition 6
Quasi-static C-V Measurements
Measurement Functions
Parameters
Specify the following parameters for VAR1 and CONST channels on the
MEASURE: QSCV SETUP screen.
Parameter Description
sweep mode Single (start to stop) or double sweep (start to stop to start).
start Start voltage of sweep. This is the output voltage at the start of
the sweep output.
The permissible range of start, stop, and step depends on the
output range of the source unit. The VAR1 source unit uses the
minimum range that covers all sweep output values. For the
output range, see Chapter 7.
stop Stop voltage of sweep. Upper or lower limit of the sweep
output.
step Incremental step voltage of sweep. The value must be greater
than or equal to double the resolution of the output range.
You must set the start, stop, and step values so that the NO. OF
STEP value is in the range: 1 to 1001. The value is calculated
from the following formula (fractions below decimal point are
rounded down).
NO. OF STEP = |start − stop| / |step| − 1
If the calculation result is 0, this value is automatically set to 1.
compliance Compliance value of source unit (SMU). The permissible range
of compliance depends on the output range of the source unit.
QSCV
meas voltage Capacitance measurement voltage (cvoltage). The value must
be ≤ |step|. The minimum value is double the resolution of the
output range, and the maximum value is 10 V.
hold time Time from the start of the first sweep step to the beginning of
the delay time.
delay time Time from the start of each sweep step to the start of the
measurement.
source Constant source output value. The permissible range of source
depends on the output range of the source unit.