Option 857 Amplitude Fidelity Performance Test - HP 8566B Adjustment Manual

8. Option 857 Amplitude Fidelity Performance Test

Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A
Adapter, Type N (m) to BNC (f) . . . . . . . . . . . . . . . . 1250-0780
BNC Tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-0781
Log Fidelity
1. On the spectrum analyzer, connect
RF INPUT. Press (jj] 9 and adjust the FREQ ZERO pot for
maximum amplitude.
2.
Press (:!I on the analyzer. Key in analyzer settings as
follows:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . + 10 dBm
3. Set the frequency synthesizer for an output frequency of 20.000
MHz and an output power level of + 10 dBm. Set the amplitude
increment for 10 dB steps.
4. Connect equipment as shown in Figure 5-l.
5. Press MARKER
center the signal on the display.
6. Press SWEEP (SINGLE)
sweep to be completed.
7. Press MARKER
synthesizer output amplitude down 10 dB.
8. On the spectrum analyzer, press SWEEP C-1 and wait until
the sweep is completed. Press MARKER
the marker A amplitude (a negative value) in column 2 of 'Ihble
5-1.
9. Repeat steps 8 and 9, decreasing the output of the frequency
sythesizer in 10 dB steps from -10 dBm to -80 dBm.
10. Subtract the value in column 1 from the value in column 2 for
each setting to find the fidelity error.
11. Subtract the greatest negative fidelity error from the greatest
positive fidelity error for calibrated amplitude steps from -10 dB
to -70 dB. The results should be s&O.8 dB.
Subtract the greatest negative fidelity error from the greatest
12.
positive fidelity error for calibrated amplitude steps from -10 dB
to -90 dB. The results should be sf2.1 dB.
Set the frequency synthesizer amplitude to + 10 dBm.
13.
the CAL OUTPUT to the
on the spectrum analyzer and wait for the
MARKER Ia]. Step the frequency
100
HZ
to
and record
Option 857 5-3