3-24
Agilent 4155B/4156B VXIplug&play Driver User’s Guide, Edition 4
Programming Examples Using HP VEE
Synchronous Sweep Measurements
Synchronous Sweep Measurements
To make synchronous sweep measurements, use the following function with the
functions shown in “Staircase Sweep Measurements” on page 22, or “Pulsed Sweep
Measurements” on page 34.
The hp4156b_setSweepSync function must be placed after the hp4156b_setIv
function or the hp4156b_setPiv function in the To/From object.
Table 3-8
Function for Synchronous Sweep Measurements
A program example is shown in Figure 3-20 on page 3-25. This program measures
MOSFET Id-Vg characteristics. The measurement setup is shown in Figure 3-19.
Figure 3-19
Device Connection and Source Setup for Example Program
Description
Function
Parameters
Synchronous Source Setup
hp4156b_setSweepSync
channel,mode,range,start,stop,comp, p_comp
A
Drain
Substrate
Gate
Source
channel: SMU2
mode: V output
range: 20V
start: Vstart
stop: Vstop
point: MeasPoint
hold: 0sec
delay: 0sec
s_delay: 0sec
comp: 0.1A
p_comp: 0.5W
channel: SMU4
mode: V output
value: Vsub
range: 2V
comp: 0.1A
polarity: AUTO
channel: SMU3
mode: V output
range: 20V
start: Vstart
stop: Vstop
comp: 0.1A
p_comp: 1W
channel: SMU1
mode: V output
value: Vs
range: 2V
comp: 0.1A
polarity: AUTO
channel: SMU2
mode: I measure
range: 0.1A
point: MeasPoint
source: Vg
value: Id
status: status
