Agilent Technologies HP 8566B Spécifications Page 53

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8. Amplitude Fidelity Test
Equipment
Frequency Synthesizer .....................................
HP 3335A
Adapter, Type N (m) to BNC (f)
............................
1250-0780
Procedure
Log Fidelity
1. 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.
2. Connect equipment as shown in Figure 2-l 1.
3. Press
[mj
on the analyzer. Key in analyzer settings as
follows:
[CENTER FREQUENCY) ......................................
.20
MHz
(FREQUENCY SPAN) .........................................
.50
kHz
(REFERENCE LEVEL] .......................................
+ 10 dBm
4. Press MARKER [PEAK SEARCH],
I-1,
[MKR
+
REF
LVL]
to
center the signal on the display.
5. Key in the following analyzer settings:
FREQUENCY SPAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.O Hz
km,
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Hz
6. Press MARKER Ia]. 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 2-12. Allow several sweeps after
each step for the video filtered trace to reach its final amplitude.
(See Figure 2-12.)
7. Subtract the value in column 1 from the value in column 2 for
each setting to find the fidelity error.
8. Subtract the greatest negative fidelity error from the greatest
positive fidelity error for calibrated amplitude steps from -10
dB
to -80
dB.
The result should be 51.0
dB
dB
9. 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 5 1.5
dB
dB
2-28 Performance Tests
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