Figure 5-11: Calibration Fixture Connections For Adjusting Loop Gain In Current Source Mode - Tektronix 371B Service Manual

Performance Verification
5-66
371B Calibration Fixture
Figure 5-11: Calibration Fixture connections for adjusting Loop Gain in current
source mode
5. Close the protective cover.
Noting the Reference Value.
6. Note the digital multimeter reading.
This reading will be used in Step 9.
7. Disconnect the shorting bar.
8. Close the protective cover.
Adjusting Loop Gain.
NOTE. See "Test Point and Adjustment Locations Pullout 2" in Chapter 8 for the
location of adjustment R305.
9. ADJUST SGI LOOP GAIN adjustment R305 on the A7 Step Generator
board for the digital multimeter reading noted in Step 6, "0.13 mA.
Readjusting for Interaction.
10. Repeat Steps 4 to 9 to determine if further adjustment is necessary.
371B Service Manual