10 | Keysight | Low Current Semiconductor Measurements
Using the B2980A Series Ammeter - Technical Overview
Example 2. LED forward diode I/V characteristics
(continued)
Step 3. (1) The Source function graphic changes to linear single sweep (upper right corner of screen).
(2) Edit the sweep parameters as shown in the igure to the following values:
- Start: 0 V
- Stop: 1.8 V (or the anode voltage that lows about 10 ~ 20 mA anode current.)
- Points: 37 (or any number required to achieve the desired Step voltage.)
Optional steps: To check the Trigger mode If the sweep measurement does not work in step 5, perform the following steps (3) thru (7).
(3) Press the [More... 3 of 3] assist key two times until it changes to the [More... 2 of 3] softkey label.
(4) Press the [Show Trigger] assist key. The trigger sub-panel is now displayed. If the Trigger mode is set to MANUAL as shown
in step (5), then perform the following steps:
(5) Using the [Knob], place the cursor over the Trigger function and press the knob to select it. This changes the assist softkey
labels.
(6) Press the [AUTO] assist key to change the Trigger function to AUTO mode.
(7) In this mode, the trigger parameter changes automatically as you change the sweep parameters.
Step 4. (1) Press the [View] key, and then press the [Graph View] function key. The X-Y graph view panel opens.
(2) Check or change the X-Y axis parameters and the x-axis maximum scale as follows:
2-1. Y: I (A)
2-2. X: SRC (Source V)
2-3. X-axis max scale: 1.8 V (or the maximum sweep voltage)
1.
2.
3.
4.
5.
6.
7.
Optional steps
(1) Press key, then press soft key.
(2) Edit Y and X axis parameter to plot the data.
Use to select items, and select from the
list of the assist key.
1.
2-1.
2-2.
2-3.
