Agilent Technologies 4155C - Multi-Channel Pulsed Spot Measurements

6-32 Agilent 4155C/4156C VXIplug&play Driver User’s Guide, Edition 4
Programming Examples for VEE Users
Multi-Channel Pulsed Spot Measurements
Multi-Channel Pulsed Spot Measurements
To make multi-channel pulsed spot measurements, use the following functions.
Table 6-16 Functions for Multi-Channel Pulsed Spot Measurements
A program example is shown in Figure 6-28 on page 6-33. This program measures
bipolar transistor collector current and base current. The measurement setup is
shown in Figure 6-27.
Figure 6-27 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