Calibration
6-5
Harmonic Distortion Adjust
This adjustment minimizes the DS345's 2nd, 3rd, and 5th harmonic distor-
tion. A complete calibration is necessary after this adjustment.
1) Set the DS345 to sine wave, 8 Vpp, 15 kHz. Connect the DS345's output
to the FFT analyzer with a 50
Ω
terminator. Set the FFT analyzer to display
from DC to 100 kHz.
2) Adjust P602 (bottom board) to minimize the levels of the third harmonic at
45 kHz and the 5th harmonic at 75 kHz.
3) Readjust the AC-DCgain balance of the output amplifier (see Output Am-
plifier Bandwidth adjustment, step 2).
4) Recalibrate the DS345.
Summary of Contents for DS345
Page 2: ......
Page 5: ...DS345 Synthesized Function Generator iii...
Page 20: ...Introduction 2 4...
Page 64: ...Programming Commands 3 14...
Page 72: ...Program Examples 3 22...
Page 78: ...Troubleshooting 4 6...
Page 82: ...Performance Tests 5 4...
Page 101: ...Calibration 6 10...
Page 109: ...Arbitrary Waveform Composer 7 8...
Page 117: ...DS345 Circuitry 8 8...