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19. Fast Sweep Time Accuracy Test (~20 ms)
2-64 Performance Tests
5. Press MARKER
(
PEAK
6. Set
to 0 Hz, (j-1 to 3 MHz, [VlDEoBW) to 3
[
)
FREQUENCY SPAN
MHz, and press TRIGGER Cm].
7. Set synthesized sweeper for an amplitude-modulated output.
8. Set function generator controls as follows:
FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . triangular wave
AMPLITUDE . . . . . . . . . . . . . .
.
.
OFFSET
SYM
.
.
T R I G G E R P H A S E
MODULATION .
9. Key in
5 ms and set function generator for a counter
(
]
SWEEP TIME
reading of 2.00 f0.02 kHz.
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 ~l~0.5 division of the sixth graticule from the left
edge of the display (see Figure 2-34).
11. Using sweep times and function generator frequencies in
procedure of step 10.
Figure 2-34. Fast Sweep Time Measurement (~20 ms)
approximately 1 Vp-p
.
.
.
.
.
.
.
.
CAL position (in)
. CAL position (in)
FREE RUN
all out
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