19. CAL Output Adjustment
Figure 3-86. CAL OUTPUT Harmonics
10. On the second spectrum analyzer, press MARKER
[
PEAK SEARCH
),
[al to position a marker on the peak of the displayed 100
MHz signal. Then, press the
key (or turn the DATA knob)
to position the second marker on the peak of each displayed
harmonic of
the
100 MHz signal in succession, and verify that the
level of each harmonic is greater than
25
down relative to the
peak of the 100 MHz CAL OUTPUT signal. See Figure 3-86.
If the level of each harmonic of the 100 MHz CAL OUTPUT is not
greater than 25
down perform the following steps:
a.
b.
C.
d.
e.
f.
On the second spectrum analyzer, press the
and
keys to
place the second marker on the peak of the highest harmonic
of the 100 MHz signal.
Adjust
TRIPLER MATCH only as much as required
to lower the level of the highest harmonic to greater than 25
down relative to the peak of the 100 MHz CAL OUTPUT
signal. Refer to Figure 3-85 for the location of
TRIPLER MATCH.
Disconnect cable 2 (red) from
300 MHz OUTPUT on
the
Phase Lock Assembly. Connect the RF INPUT of the
second spectrum analyzer to
300 MHz OUTPUT.
On
the second spectrum analyzer, key in
LEVEL
]
40
MARKER
MARKER
[
PEAK SEARCH
)
to
position a marker on the peak of the displayed 300 MHz signal.
Readjust
TRIPLER MATCH as necessary for a 300
MHz signal level of at least + 16.5
Disconnect
the
second spectrum analyzer from
300
MHZ OUTPUT, and reconnect cable 2 (red) to
300 MHz
OUTPUT.
Repeat steps 9 through
until no further adjustment is
required.
11. Replace the RF Section bottom cover.
Adjustments
