Section 5: Capturing high power pulse waveforms Model 2651A High Power System SourceMeter® Instrument User's Manual
Figure 12: GPIB communication example for fast ADC
CURSOR
SRC
MEAS
LIMIT
MODE
POWER
AUTO
OU
TPUT
ON / OFF
2651A HIGH POWER SYSTEM SourceMeter ®
1
2
3
4
DISPLAY
CONFIG
5
6
7
8
9
0
+/-
0000
SPEED
DIGITS
FILTER
REL
RECALL
STORE
MENU
TRIG
ENTER
LOCAL
EXIT
RUN
LOAD
CONFIG
NF
P
U
SH
TO
ED
IT
/E
N
TE
R
P
U
SH
TO EDIT/EN
TE
R
+3.21000V
ARM
SrcA:+20.0000 A LimAL10.0000V
GPIB
Controller
Device connections
Make the connections as illustrated in the following figure. To ensure good contact, use care when
making connections.
Figure 13: Connections for fast ADC example
G
G G G
S
LO
SENSE/GUARD
S
HI
LO
HI
OUTPUT
40V, 50A MAX.
S HI
HI
S LO
LED
(DUT)
LED
(DUT)
LO
Model 2651A
Equivalent
HI
S HI
LO
S LO
SMU
Configuring the trigger model
To output precisely timed high power pulses and accurately capture the pulse with the fast ADC, the
trigger model of the Model 2651A High Power System SourceMeter
®
Instrument must be used. Using
the trigger model, we can output pulses as large as 50 A with pulse widths as small as 100
μ
s and
position our measurements with microsecond resolution. The image below is a diagram of the trigger
model used in this example.
5-2
2651A-900-01 Rev. A / March 2011
