21. Fast Sweep Time Accuracy
ms)
5. Press MARKER
[
PEAK SEARCH
),
6.
Set
[
FREQUENCY SPAN
]
to 0 Hz,
to 3 MHz,
to 3
MHz, and press TRIGGER [VIDEO).
7. Set synthesized sweeper for an amplitude-modulated output.
8. Set function generator controls as follows:
FUNCTION . . . . .
. . . . . . triangular wave
AMPLITUDE . . . .
approximately 1 Vp-p
OFFSET . . . . . . . . . . .
. . . . . CAL position (in)
. . . . . . . . . . . . . .
. . . . . CAL position (in)
TRIGGER PHASE .
. . . . . . . . . . . FREE RUN
MODULATION . . . .
. . . . . . . . . . . . . . . . all out
9. Key in
(
SWEEP TIME
]
5 ms and set function generator for a reading
of 2.00 f0.02
10. Adjust spectrum analyzer TRIGGER LEVEL to place a peak of
the triangular waveform on the first graticule from the left edge
of the CRT display as a reference. (Adjust function generator
amplitude, if necessary, to provide a signal large enough to
produce a stable display.) The fifth peak from the reference
should be within
division of the sixth graticule from the left
edge of the display. (See Figure 2-36.)
11. Using sweep times and function generator frequencies in
2-23, check sweep time accuracy for sweep times
ms by
the procedure of step 10.
Figure 2-36. Fast Sweep Time Measurement
ms)
Performance Tests
