Figure 5-5: Calibration Fixture Setup For Checking Collector Current Measurement Accuracy In High Voltage Mode - Tektronix 371B Service Manual

Performance Verification
5-50
NOTE. When you want to set the PEAK POWER WATTS to 30 mW, simultaneous-
ly press the cursor SHIFT button and the 30 mW button. The indicator to the
left of LOW will change color from red to green.
1. Press the POLARITY button while pressing the SHIFT button to enter
vertical amplifier check mode.
2. Set the peak power watts controls to 20 mW and the VERTICAL VOLTS/
DIV control to 1 mA/DIV.
3. Connect the current source between the COLLECTOR SUPPLY HIGH
VOLTAGE and the COMMON terminals on the Calibration Fixture by using
two long patch cords as shown in Figure 5–5.
371B Calibration Fixture
Figure 5-5: Calibration Fixture setup for checking collector current measurement
accuracy in high voltage mode
4. Verify that vertical CURSOR readout is within the limit shown in Table
5–10 at each setting of the current source, peak power watts, and VER-
TICAL CURRENT/DIV.
5. Disable the current source, then disconnect the patch cords.
6. Initialize the 371B.
371B Service Manual