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Measurement
Summary
1. Connect the cable TV analyzer CAL OUT to the INPUT 75
Q
and press the
(PRESET)
key.
2. Set the center frequency by pressing the following keys:
L-1,
300
INIHz).
3. Set the span by pressing the following keys:
m),
20 [MHz).
4. The calibration signal is 20
dB
(two graticule divisions) below the top of
the screen using these cable TV analyzer settings. If desired, adjust the
reference level: press
@ZiZG@
to activate the reference level, and use
the knob or step keys to change the reference level.
5. Determine the amplitude and frequency of the signal. You can either press
(PEAK SEARCH] or press
(MKR)
and move the marker to the signal peak.
Read the amplitude and frequency. The display screen should look like the
one in Figure 2-6. Frequency is displayed horizontally, and amplitude
(power) is displayed vertically.
(g:
33:
00
JUL
29.
1993
MKR
300.05
MHz
I
CENTER
300.00
MHz
SPAN
20.00
MHz
RES
BW
100
kHz
mw
30
kHL
SWP
20.0
msec
MARKER
NEXT
PEAK
NEXT
PK
RIGHT
NEXT
PK
LEFT
2-20
Figure
2.6.
Reading the Amplitude and Frequency