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19. Fast Sweep Time Accuracy Test
(~20
ms)
5. Press MARKER (PEAK
SEARCHJ@~EFZF),~.
6. Set [FREQUENCY SPAN) to 0 Hz,
(j-1
to 3 MHz,
[VlDEoBW)
to 3
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 . . . . . . . . . . . . . .
. .
approximately 1 Vp-p
OFFSET
...... CAL position (in)
SYM . . . .
.
. .CAL position (in)
TRIGGER PHASE
.
.
FREE RUN
MODULATION
.
.
.
. all out
9. Key in (SWEEP TIME] 5 ms and set function generator for a counter
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
Table
2-18, check sweep time accuracy for sweep times
~20
ms by
procedure of step 10.
Figure 2-34. Fast Sweep Time Measurement
(~20
ms)
2-64 Performance Tests