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16. YTO Loop Adjustments
REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5 dBm
LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB/DIV
13.
Set the Spectrum Analyzer (DUT) LINE switch to ON, and key
]
in
SPAN
tunes the Al lA3 YTO to approximately 6.00 GHz.
14.
On the second spectrum analyzer, key in (SHIFT) TRACE A
the peak of the displayed 6.00 GHz signal. Press
on the second spectrum analyzer, and wait for the preselector
peaking routine to complete.
15.
On the Spectrum Analyzer (DUT), key in
3.6786 GHz. This tunes the AllA YTO to approximately 4.00
16.
On the second spectrum analyzer, key in
a marker on
the
peak of the displayed 4.00 GHz signal. Press
)
on the second spectrum analyzer and wait for the
PEAK
preselector peaking routine to complete.
17.
On the second spectrum analyzer. kes in LOG SCALE
ENTER
18.
On the spectrum analyzer (DUT), key in SWEEP (SINGLE),
]
200 set, (mj SWEEP (CONT) t. A "HARMONIC
TIME
LOCK 1" message should appear on the CRT display of the
spectrum analyzer (DUT).
19.
On the spectrum analyzer (DUT), key in
FREQUENCY
tunes the AllA YTO from approximately 2.20 GHz to 6.20 GHz.
Wait for
the
sweep to complete (200 seconds)
LED to turn off.
20.
On the Spectrum Analyzer (DUT), key in
)
100 MHz,
STEP SIZE
knob and step keys, tune the AllA YTO to position the TRACE
A signal at the lowest point on the TRACE B waveform on the
display of the second spectrum analyzer. See Figure 3-72. Key in
(
]
0 Hz,
CENTER FREQUENCY
)
to position a marker on
PEAK SEARCH
(
CENTER FREQUENCY
[
PEAK SEARCH
TRACE B (j-j,
[
START FREQUENCY
)
5.8786 GHz, IsAvE_) 4, SWEEP C-1. This
[
FREQUENCY SPAN
[
].
Using the DATA
CENTER FREQUENCY
5.6786 GHz. This
)
PEAK
)
)
to position
_)
1.8786
and
the SWEEP
]
0 Hz,
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