Agilent 4155B/4156B VXIplug&play Driver User’s Guide, Edition 4
3-17
Programming Examples Using HP VEE
High-Speed Spot Measurements
High-Speed Spot Measurements
To make high-speed spot measurements, use the following functions.
Table 3-1
Functions for High-Speed Spot Measurements
A program example is shown in Figure 3-13 on page 3-18. This program measures
MOSFET drain current. The measurement setup is shown in Figure 3-12.
Figure 3-12
Device Connection and Source Setup for Example Program
Description
Function
Parameters
Output Switch Setup
hp4156b_setSwitch
channel,state
Output Filter Setup
hp4156b_setFilter
channel,state
Integration Time Setup
hp4156b_setInteg
table,time,average
Forces dc bias
hp4156b_force
channel,mode,range,value,compliance,polarity
Executes measurement
hp4156b_spotMeas
channel,mode,range,value,status
Disables output
hp4156b_zeroOutput
channel
A
Drain
Substrate
Gate
Source
channel: SMU2
mode: V output
value: Vd
range: 20V
comp: 0.1A
polarity: AUTO
channel: SMU4
mode: V output
value: Vsub
range: 2V
comp: 0.1A
polarity: AUTO
channel: SMU3
mode: V output
value: Vg
range: 20V
comp: 10mA
polarity: AUTO
channel: SMU1
mode: V output
value: Vs
range: 2V
comp: 0.1A
polarity: AUTO
channel: SMU2
mode: I measure
value: Id
range: 0.1A
status: status
