HP 8566B Adjustment Manual page 392

8. Option 857 Amplitude Fidelity Performance Test
5-4 Option 857
14. Key in the following analyzer settings:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 kHz
SWEEP ICoNTl
15. Press MARKER
center the signal on the display.
16. Key in the following analyzer settings:
17. Press MARKER A. Step the frequency synthesizer output
amplitude from + 10 dBm to -80 dBm in 10 dB steps, noting
the MARKER A amplitude (a negative value) at each step and
recording it in column 2 of Table 5-2. Allow several sweeps after
each step for the video filtered trace to reach its final amplitude.
18. Subtract the value in column 1 from the value in column 2 for
each setting to find the fidelity error.
19. Subtract the greatest negative fidelity error from the greatest
positive fidelity error for calibrated amplitude steps from -10 dB
to -70 dB. The result should be SO.6 dB
20. Subtract the greatest negative fidelity error from the greatest
positive fidelity error for calibrated amplitude steps from -10 dB
to -90 dB. The result should be 51.5 dB
Log Amplitude Fidelity (10 Hz RBW; Option 857)
1
Frequency
Synthesizer Calibrated MARKER A Amplitude (Column 2 - Column 1)
Amplitude Amplitude
Step
0 (ref)
0 - 1 0
- 2 0
- 1 0
- 2 0 - 3 0
- 3 0 - 4 0
- 4 0 - 5 0
- 5 0 - 6 0
- 6 0 - 7 0
- 7 0 - 8 0
- 8 0 - 9 0
Fidelity Error
2
0 (ref)
. 100 kHz
to
.O Hz
0 (ref)