Sony Tektronix VX4792 User Manual page 257

Performance Verification
F-24
6. Check external AM operation with +1 V AM input: Check that the DMM
reading is between 2.375 V and 2.625 V (100% modulation).
7. Adjust function generator offset for 0 V:
a. Disconnect the 50 W terminator from the DMM.
b. Disconnect the coaxial cable from the function generator output.
c. Connect the function generator output to the DMM.
d. Adjust the function generator offset for a 0.00 V DMM display.
e. Disconnect the DMM from the function generator output.
f. Install the test setup (see Figure F–11 and step 4).
8. Check external AM operation with 0 V AM input: Check that the DMM
reading is between 1.125 V and 1.375 V (50% modulation).
9. Adjust function generator offset for –1.00 V:
a. Disconnect the 50 W terminator from the DMM.
b. Disconnect the coaxial cable from the function generator output.
c. Connect the function generator output to the DMM.
d. Adjust the function generator offset for a –1.00 V DMM display.
e. Disconnect the DMM from the function generator output.
f. Install the test setup (see Figure F–11 and step 4).
10. Check external AM operation with –1 V AM input: Check that the DMM
voltage reading is between –0.125 V and 0.125 V (0% modulation).
11. End procedure: Turn the function generator output off. Disconnect the
function generator and DMM.
VX4792 User Manual