3-32
Agilent 4155B/4156B VXIplug&play Driver User’s Guide, Edition 4
Programming Examples Using HP VEE
Multi-Channel Pulsed Spot Measurements
Multi-Channel Pulsed Spot Measurements
To make multi-channel pulsed spot measurements, use the following functions.
Table 3-16
Functions for Multi-Channel Pulsed Spot Measurements
A program example is shown in Figure 3-28 on page 3-33. This program measures
bipolar transistor collector current and base current. The measurement setup is
shown in Figure 3-27.
Figure 3-27
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 (pulse channel must be set to OFF)
Integration Time Setup
hp4156b_setInteg
table,time,average
Forces dc bias
hp4156b_force
channel,mode,range,value,compliance,polarity
Sends Command String
hp4156b_cmd
command (PT and PV commands are sent)
Executes measurement
hp4156b_startMeasure
meas_type,channel[ ],mode[ ],range[ ],source
Disables output
hp4156b_zeroOutput
channel
Reads measurement data
hp4156b_readData
eod,data_type,value,status,channel
A
Collector
Base
Emitter
channel: SMU1
mode: V output
value: 0V
range: AUTO
comp: 0.1A
polarity: AUTO
channel: SMU2
mode: V output
value: 0V
range: 2V
comp: 0.1A
polarity: AUTO
channel: SMU3
mode: V pulse
range: AUTO
base: 0V
pulse: -0.8V
comp: 0.1A
hold: 0sec
width: 5msec
period: 10msec
t_delay: 0sec
priority: P width
channel: SMU1
mode: I measure
value: Ic
range: AUTO
A
channel: SMU2
mode: I measure
value: Ib
range: AUTO
1:PV command parameters
2:PT command parameters
1
2
