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Figurc
6-28.
Baseline
levefing
tert
setup.
(6)
Adjust
R1069
for
a
triangular
waveform
across
the
screen.
See
Figure
6-g1b:
f/)
Reset
Rl0tg
through
Rl061
to
midrange.
(8)
Sweep
Band
4
in
2
GHz
increments.
Set
the
Spectrum
Analyzer
as
foltows
for
th€
first
2
GHz
portion
of
Band
4.
l.
Adjust
the
slop€
of
band
5
as follows:
(1)
-Reset
the
Sweep Oscillator
so
it
sweeps
from
15
GHz
to 21
GHz
(Marker
Sweepl
and
set
the out_
Plt
9o
the
power
meter
reads
approximately
-10
dBm.
(2)
Set R1070 (Band
5
Stope)
on
the Mdeo
proces-
sor
board,
fully
counterclockwise.
(3)
Set
the Spectrum
Analyzer
controls
as
follows:
FREQUENCY
RANGE
15-2i
GHz
FREQUENCY
15GHz
FREQ
SPAN/DIV
MAX
AUTO
RESOLN
On
REF
LEVEL
-1OdBm
MIN
RF
ATTEN
O dB
VERTICAL
DTSPLAY
10
dB/Dtv
TIMEID|V
50
ms
The
UNCAL
indicator
wiil
tight.
(4)
Select
a
15
GHz
marker
on the
Sweep
Oscillator
and
set
the
output
for
--10
dBm.
(5)
Activate
2
dBiDlV and
set
the
REF
LEVEL
such
that
the
signal
amplitude
is approximatety
6 divi-
sions.
Set MANUAL
PEAK
for
maximum
response
or activate
AUTO
PEAK.
(6)
Change
the
Sweep
Oscillator
to
Automatic
Inter-
nal
Sweep
and
set
the
Sweep Time
for 100 s or
its
slowest
sweep.
FREQUENCY
RANGE
FREQUENCY
FREQ
SPANiDtv
RESOLUNON
BANDWIDTH
REF
LEVEL
VERTICAL
DISPLAY
TrME/D|V
PEAK/AVERAGE
MAX
HOLD
5.4-18.0
GHz
6.4
GHz
200
MHz
1
MHz
-20
dBm
10
dBiDtv
AUTO
Fully
Counter-
clockwise
On
(9)
Check
that
flatness
is
within
+g.S
dB. tf
flatness
is
out
of
limits,
activate
SAVE
A
and
WIDE
MDEO
FILTER,
and
deactivate
MAX
HOLD.
Reset
REF
LEVEL
so
the
baseline
is
on
the
screen.
(10)
.Adjust-leveling
potEntiometers
to
compensate
for abnormalities
in
tha
SAVE
A disptay.
(11)
Recheck
the
2eHz
window
for
flatness.
Proceed
checking
the
Band
5 flatness
in
2
GHz
increments.
Maintenance
-
4g4Al4S4Ap
Servtce
Vot.
1
TO
EXT.
ALC
lltPUT
COt{ftECTCn
-
F;
I
o
I
o
RF
CXT
OUT
AtC
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o
SWEEP
OSCILLATOR
TO RF
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COr*ecroes
6-47