most
right
position
on
the
same
line. Select
and
press a
numbered
key
to
enter
numeric
information
into
the
system
and
onto
the
CRT
display screen.
When
a
num-
bered key is pressed the system replaces
an
existing
number
on
the
screen, over which the display
cursor
is
set, with
the
number
on
the pressed key.
The
system
cor-
rectly places the decimal
point.
Use
the
keypad
to
enter
input
frequency for
RF
and
IF
generators,
private line
frequencies, timing
information
for
paging systems, etc.
attenuator
in
the
0 dB position.
Use
the
attenuator
to
reduce
the
input
signal level
and
thus
remove
the
over-
load
warning.
ro"'CTION
G<"n(!r;thl
MonltOf
-
-)
553.9999
MHz
MONITORFM
-77.3
DBM
INPUT
LEVEL
30.2 uV
FM
_
cw
e
AM
•
Ste
osase
SWP
'.10
I~H,
SWP
01.,
MHz
-15
-99.9
-100
ERROR
KHZ
o
DEV
KHZ
o
+23.7
+
15
+99.9
+100
.1"Ie-nilU'"
Focu"
mm
FIGURE
3-4.
FUNCTION
SECTION
3.2
FUNCTION
SECTION
+
15
---.- W
-44
FREQUENCY
MODULATION
CONTINUOUS
WAVE
AMPLITUDE
MODULATION
SINGLE
SIDE
BAND/DOUBLE
SIDE
BAND
SUPPRESSED
CARRIER
SWEEP
1
MHz
to
10
MHz
SWEEP
0.01
MHz
to
1
MHz
ERROR
KHZ
•
-
-)
101.1000
MHZ
o
INPUT
LEVEL
MONITORCW
--.-
DBM
-15
SWP
1-10
MHz
SWP
.01-1
MHz
Figure 3-4 shows
the
front
panel
FUNCTION
section
with the toggle switch
(Generate
or
Monitor),
two
arrow
selection keys -
up
or
down,
and
six
modes
with their
LED's:
FM
CW
AM
SSB/DSBSC
FIGURE
3-3.
CATHODE
RAY
TUBE
DISPLAY
SCREEN
DEV
ALARM
07.0
KHZ
•
CRT
DISPLAY
SCREEN
The
CRT
screen (figure 3-3) displays fixed
alphanu-
merics, a
movable
cursor,
operator
enterable
numeric
information,
and
system
generated
data
outputs.
The
CRT
continuously
displays all functions,
control
set-
tings,
and
measurements
(generated
or
monitored)
in
both
analog
and
digital forms.
Bargraphs
aid the
autoranging
digital
readouts.
Each
bargraph
has a base
line,
calibration
markers,
and
intensified segment show-
ing the
measured
value.
When
the Analyzer
is
switched
into
another
mode,
the
CRT
instantly displays all perti-
nent
information.
Use the
dual
control
located
at
the
lower
right-hand
corner
of
the
CRT,
to
adjust
the inten-
sity
and
focus
of
the
display. See Section 1
for
Trace
Rotation
Adjustment
procedure
to
re-align a tilting
display screen.
FIGURE
3-5.
CW
DISPLAY
FIGURE
3-6.
AM
DISPLAY
A typical
Continuous
Wave
display screen (figure 3-5)
shows set frequency, frequency
error,
and
RF
input
level.
Modulation
data
is
not
monitored.
-
-)
101.1000
MHZ
"---/
+
15
-41
+ 100
+70.4
---.- W
o
o
PCTAM
ERROR
KHZ
•
INPUT
LEVEL
MONITOR
AM
--.-
DBM
-15
-60.5
-100
3-2
• SYSTEM
WARNINGS
The
Analyzer provides
protection
against accidental
ap-
plication
of
high level energy
into
the
RF
ports.
A fused
BNC
connector
provides
protection
for
the
high level
generator
output
antenna
port.
At
the transceiver
port,
where the system
is
automatically
in
power
monitor
mode,
the
application
of
RF
energy in excess
of
100
milliwatts switches
the
Analyzer
from
generate
to
monitor
mode.
When
too
much
RF
is
applied
to
the
transceiver,
an
audible
alarm
warns
and
a visual
warn-
ing
appears
on
the
CRT.
Displays also
warn
of
low
bat-
tery power, improp.er
attenuator
setting
for
particular
measurements,
or
overheated
RF
load.
A
continuous
audible
alarm
sounds
when
a preset deviation limit
is
ex-
ceeded in
monitor
mode.
An
RF
overload
warning
dis-
plays
on
the
CRT
in place
of
the
modulation
metering
for
strong
RF
input
levels which
could
introduce
measurement
error.
The
warning
does
not
display
for
input
levels below
-40
dBm
at
the
antenna
port
and
below
-10
dBm
at
the
transceiver
port
with
the
RF
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