HP 8568B, Руководство по испытаниям и регулировке работы, Страница: 73 / 313

15. Spurious Responses Test
signal for a marker indication of -20.00 (-30.0 at the
input mixer with 10 of input attenuation).
6 On the spectrum analyzer, key in MARKER
FREQUENCY
)
560 MHz, MARKER
SEARCH
)
to position
a second marker on the peak of the second harmonic distortion
product of the 280 MHz input signal. The response should be
below the display line
below the input signal level).
Second Harmonic
7. On the synthesized sweeper, key in
LEVEL
)
decrease
the amplitude of the 280 MHz signal by 10
8. On the spectrum analyzer, key in MARKER
FREQUENCY
)
280 MHz,
[
REFERENCE LEVEL
)
-30
DISPLAY LINE [ENTER] -105 MARKER
SEARCH
)
to
position a marker on the peak of the displayed 280 MHz signal.
9. On the synthesized sweeper, press
[
POWER LEVEL
]
and use the
ENTRY knob to adjust the amplitude of the displayed 280 MHz
signal for a marker indication of -30.00
(-40.0 at the
input mixer with 10 of input attenuation).
10. On the spectrum analyzer, key in MARKER
[
CENTER FREQUENCY
)
840 MHz, MARKER
[
PEAK SEARCH
)
to position
a second marker
on
the peak of the third harmonic distortion
product of
the
280 MHz input signal. The response should be
below the display line below
the
input signal level).
Third Harmonic
Performance Tests 2-51