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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 Step
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