HP 8568B, Performance Tests And Adjustments Manual, Page: 51 / 313

8. Frequency Response
42. Press DISPLAY LINE on the spectrum analyzer. Use the
Display Line to measure the maximum and minimum points on
the trace. (Disregard LO Feedthrough at 1
Record the
measurements below.
SIGNAL INPUT 1
(1 to 100
Maximum
Minimum
43. Set Display Line to peak of trace at 1
44. Key in
the
following spectrum analyzer settings:
TRACE A
(
CLEAR
-
WRITE
)
1
Hz
45. Set function generator controls as follows:
RANGE Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 (button)
FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
MODULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..all out
46. Adjust function generator FREQUENCY as necessary to place
signal near center graticule line and adjust AMPLITUDE VERNIER
to place peak of signal at Display Line.
47. Key in the following spectrum analyzer settings:
FREQUENCY SPAN) . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Hz
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Hz
48. STEP
to 100 Hz. Step spectrum analyzer
(
C E N T E R
from 1 to 100 Hz with while setting
function generator FREQUENCY to match spectrum analyzer
center frequency at each step. Record level-at each setting.
SIGNAL INPUT 1
1000 Hz
900 Hz
800 Hz
700 Hz
600 Hz
500 Hz
400 Hz
300 Hz
200 Hz
100 Hz
Performance Tests 2-29