Filter
Top Products
Input Calibration
January 2009 UDA2182 Universal Dual Analyzer Product Manual 175
Step Action Screen
Use to select
Bias Scan
4
Press
Enter
to initiate the
Bias Scan screen
At any time press “Exit” to
abort scan.
You will see:
IN1 BIAS SCAN
Enter to scan
0.55V 144μA
0 0.2 0.4 0.6 0.8 1V
μA 0
80
160
240
IN1 BIAS SCAN
Enter to scan
0.55V 144μA
0 0.2 0.4 0.6 0.8 1V
μA 0
80
160
240
µA may be 0, 40, 80, 120
Scan in Progress (Example)
The bias voltage is adjusted down
from its original value (usually 0.55V)
at 25mV/sec until 0V is reached.
Scanning
μA 0
IN1 BIAS SCAN
0.05V 13μA
0 0.2 0.4 0.6 0.8 1V
80
160
240
Scanning
μA 0
IN1 BIAS SCAN
0.05V 13μA
0 0.2 0.4 0.6 0.8 1V
80
160
240
IN1 BIAS SCAN
0.05V 13μA
0 0.2 0.4 0.6 0.8 1V
80
160
240
Then the bias voltage is driven up to
1.0 V at 25 mV/sec until “Scan
complete” appears.
0.90V 236μA
0 0.2 0.4 0.6 0.8
μA 0
80
160
240
1V
IN1 BIAS SCAN
Scan complete
0.90V 236μA
0 0.2 0.4 0.6 0.8
μA 0
80
160
240
1V
IN1 BIAS SCAN
Scan complete
5
Press
Enter
to start scan
and finally, it is driven down again
until it has returned to the value it had
just before the test was initiated.
During this voltage sweep, the probe
current is monitored and the graph of
current as a function of voltage is
displayed.
IN1 DO BIAS SCAN
Ent=save,
0.55V 144μA
0 0.2 0.4 0.6 0.8
μA 0
80
160
240
=Chng
1V
IN1 DO BIAS SCAN
Ent=save,
0.55V 144μA
0 0.2 0.4 0.6 0.8
μA 0
80
160
240
=Chng
1V
At the completion of the test an
opportunity to change the bias voltage
is provided.
Press
to change the bias
voltage, or