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The Video Filter circuit can be checked from the front panel. With no input signal, press
Instrument Preset and set the controls as follows:
CENTER FREQUENCY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REFERENCE LEVEL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Press (SINGLE] sweep. Then press the DATA STEP @j key once as the cursor crosses each
horizontal division. The display should appear as in Figure 2. Now key in (ZiGi] TRACE A
as in Figure 3.
R E F - 9 0 . 0 dRn
1 0 dB/
C E N T E R 2 5 . 0 0 0 M H z
4 A4Al
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 dB
VBW 3 0 kHz
RES BW 1 kHz
Figure 2. Video Bandwidth Step Display
MHz
25
. . . 100 kHz
. . . . . . . 20 s
. -90 dBm
. . . . . . 1 Hz
Hz. Press the
1
SPAN 1 0 0 kHz
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