HP 8568B Performance Tests And Adjustments Manual page 76

15. Spurious Responses Test
2 - 5 4 P e r f o r m a n c e T e s t s
24. On the frequency synthesizer, readjust the signal amplitude as
necessary to position the peak of the displayed 29.99 MHz signal
at the top CRT graticule line.
25. On the spectrum analyzer, key in MARKER @,
30.01 MHz, MARKER
(CENTER E )
FR QUENCY
position a second marker at the peak of the 30.01 MHz third-order
intermodulation product. The response should be below the
display line (>70 dB below
26. On the spectrum analyzer, key in
MARKER
[
PEAK SEARCH
of the 29.98 MHz third-order intermodulation product. The
response should be below
input signals).
27. On the synthesized sweeper, press
the
amplitude of the 30 MHz signal by 13.0 dB from the current
setting.
28. On the frequency synthesizer, key in
and then decrease the amplitude of the 29 MHz signal
( ]
AMPLITUDE
by 13.0 dB from the current setting.
29. Set the controls of the spectrum analyzer as follows:
CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 MHz
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . ,500
REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -33 dBm
MARKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30. On the spectrum analyzer, key in DISPLAY LINE [ml -105
the displayed 29 MHz signal.
31. On the frequency synthesizer, adjust the signal amplitude for a
marker indication of -33.0 dBm.
32. On the spectrum analyzer, key in
MARKER
[
PEAK SEARCH
displayed 30 MHz signal.
33. On the synthesized sweeper, adjust the signal power level for a
marker indication of -33.0 dBm (total signal power of -40 dBm
at the input mixer with 10 dB of input attenuation).
34. On the spectrum analyzer, key in MARKER a,
1
[ NTER FREQUENCY)
CE
a second marker at the peak of the 1 MHz second-order
intermodulation distortion product. The response should be below
the display line (>75 dB below the total input power).
(
PEAK SEARCH
the
input signals).
[
CENTER FREQUENCY
to position a second marker at
)
the
display line (>70 dB below the
(
POWER LEVEL
[
FREQUENCY
to position a marker on the peak of
)
SEARCH
FREQUENCY
to position a marker on the peak of the
)
H , MA R
RKE [
M Z
PEAK
to
)
29.98 MHz,
)
the
peak
and decrease
]
29 MHz,
]
Hz
OFF
30
MHz,
)
to position