Subject to change without notice
14
3. 4. Measuring device parameters
Generally, the behavior of transistors is determined by their static and
dynamic parameters. To display the different parameter values on the
display press one of the two bush buttons
← →
← →
← →
← →
← →
(5)
which are located
below the LCD.
The screen cursor (highlighted dot) indicates exactly the point on the curve
where the actual measurement happens to be done.
Please ensure that the DUT function has been activated to perform the
measurement.
The following parameters can be measured and displayed by the instrument:
Static Parameters
V
B
/V
G
Base/Gate Voltage
I
B
/I
G
Base/Gate Current
I
C
/I
D
Collector/Drain Current
V
C
/V
D
Collector/Drain Voltage
β
Current Gain
Dynamic Parameters
h11
Short-circuit input impedance
h21
Short-circuit forward-current transfer ratio
h22
Open-circuit output conductance
y21
Short-circuit forward admittance
y22
Short-circuit output admittance
3. 5. Using the cursor functions
The cursor (highlighted dot) indicates the point on a characteristic curve
where the actual value is going to be digitized by the instrument. After the
HM6042
has been powered on, the cursor will appear on the third of the
five characteristic curves.
The cursor can be repositioned by using the
CURSOR
switch
(6)
or the
rotary knob
(8)
. With the
CURSOR
key
(6)
the cursor can be moved from
one curve to the next. To move the cursor horizontally along a curve please
select on the LED function bar
(FUNCTION 9, 7)
and turn the rotary
knob
(8)
to reposition it in the desired direction.
The numerical value for the selected static parameter
(5)
will be displayed
on the LCD in accordance to the actual cursor position.
When choosing the option to display one of the dynamic parameters h11,
h21, or y21, a second cursor appears on the curve below. Turning the
rotary knob, now moves both cursors horizontally along their respective
curves. The
HM6042
digitizes the values as required at the highlighted
positions and displays the calculated result on the LCD.
If you selected to test one of the dynamic parameters h22 or y22, the
second cursor appears on the same curve beside the original cursor. Turning
