Agilent 4155B/4156B VXIplug&play Driver User’s Guide, Edition 4
3-19
Programming Examples Using HP VEE
Multi-Channel Spot Measurements
Multi-Channel Spot Measurements
To make multi-channel spot measurements, use the following functions.
Table 3-3
Functions for Multi-Channel Spot Measurements
A program example is shown in Figure 3-15 on page 3-20. This program measures
bipolar transistor collector current and base current. The example uses the User
object of the HP VEE. See Figure 3-16 on page 3-21. The measurement setup is
shown in Figure 3-14.
Figure 3-14
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_measureM
channel[ ],mode[ ],range[ ],value[ ],status[ ]
Disables output
hp4156b_zeroOutput
channel
A
Collector
Base
Emitter
channel: SMU1
mode: V output
value: 0V
range: 2V
comp: 0.1A
polarity: AUTO
channel: SMU2
mode: V output
value: 0V
range: 2V
comp: 0.1A
polarity: AUTO
channel: SMU1
mode: I measure
value: Ic
range: AUTO
status: IcStatus
A
channel: SMU2
mode: I measure
value: Ib
range: AUTO
status: IbStatus
channel: SMU3
mode: V output
value: Vbe
range: 2V
comp: 0.1A
polarity: AUTO
