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Channel Measurements
Making Channel Measurements
In-channel frequency 1. Select a channel, then press Main 1 of 3 Main 2 of 3
response test
IN-CHAN
FRCj
RSP .
2.
Press SWP TEST SETUP if you will be using a manually swept signal or
line sweep as a test signal. See Figure 8-16. This setup puts Trace A into
max hold with 2 markers and with Trace B active.
a. After Trace A achieves sufficient data, the markers can be placed on
the peak and the valley using the keys MARKER 1 and MARKER 2
b.
Pressing CALC
FRQ
RESP calculates the frequency response using the
positions of the 2 markers.
C.
Pressing RESTART MAX HOLD resets Trace A.
Hints
a. Press the
m
(HOLD1
key to clear the active area to make markers more visible if placed
there.
b. Try using line sync when the sweep signal is sweeping at a rate near the vertical sync rate. Press
TRIG, LINE.
3. If Option 107 is installed, press VITS TEST to select a vertical interval
test signal for testing.
a. The analyzer automatically defaults to line number 19. An appropriate
test signal may or may not be present at this line number. Test signals
can be GCR, FCC multiburst, NTC 7 combination multiburst, or sin
x/x.
Refer to Figure 2-32, Figure 2-33, Figure 2-34, and Figure 2-35.
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