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)

T R I G G E R

P H A S E .

.

 

 

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