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SECTION 3
OPERATION
•
SELF-TEST DISPLAY EXAMPLES:
3.0
OPERATION
•
GENERAL
The Communications System Analyzer is easy to use.
Connectors, controls, and indicators are conveniently
and logically arranged in functional groups outlined in
red on the front panel. The Analyzer incorporates many
useful applications that are not evident by examining
the front panel. The appropriate section of this manual
clearly explains these applications and how to access
them by manipulating the keypad. The CRT displays an
organized presentation of measurement results. A non-
volatile memory conveniently stores the data entered
into the system by the operator. The system provides
warning messages and audible alarms to ease operation
and minimize errors.
3.1
POWER SECTION
REFER TO
ADDENDUM
AT THE END
OF THIS SECTION
PAGE 3-21
•
STANDBY
In Standby or center position, if the line cord is con-
nected to AC power, the battery charger continues to
operate and power is applied to the internal frequency
standard.
On
Slnnnhy
OcOfl
•
DC OFF
In the full-down position DC Off, if the line cord is con-
nected to AC power, only the battery charging circuit
operates.
B.ll1
AC
FIGURE
3-1.
POWER CONTROLS
• POWER
The Analyzer operates on AC or DC. AC can be either
100 to 130 VAC or 200
to
260 VAC, 47 Hz to 400 Hz
capable of 115 Watts. Use the recessed LINE switch on
the rear panel to select either
110
or
220
voltage. DC
input from Motorola battery pack RTP-1002A or any
convenient external battery source operates from
+
11 V
to
+
16 V, 6.5 amps maximum, with not more than 90
Watts DC input. Refer to Section
I
of this manual for
installation instructions for the Motorola battery pack
that attaches to the rear panel and provides approx-
imately
50
minutes continuous operation. Figure
3-1
shows a three-position toggle switch located to the right
of the keypad on the front panel and used to control the
Analyzer's power supply.
•
ON
The On, or full-up, posItIOn of the toggle switch
energizes all circuitry except the battery charger.
•
SELF-TEST
When the power switch is first turned on, the Analyzer
performs an internal check of its own circuits to detect
possible trouble. If the system detects an error, during
the course of this self-test, a message displays on the
screen to indicate the nature of the trouble and provide
some guidance for troubleshooting and/or continued
operation.
3-1
•
LED INDICATORS
AC LED indicator illuminates whenever AC power is
connected to the three-pin power connector on the rear
panel. Batt (battery) LED indicator illuminates when-
ever DC power is connected to the DC POWER con-
nector on the rear panel. AC and DC indicators never
illuminate together. The system switches automatically
between AC and DC, with preference for AC if both are
present. Oven Ready LED indicator illuminates auto-
matically when the internal frequency standard has
stabilized and the system is ready to operate accurately.
allmll
,
IIIIElEI
11111111
FIGURE 3-2.
KEYPAD
•
KEYPAD
The keypad shown in figure 3-2 has a down arrow key to
move the cursor vertically on the CRT, a left arrow key
to move the cursor horizontally, and a key for each
number 0
[0
9. Wllt:1l moved down,
the cursor
will
move
to the first allowable position to the left on the next
lower data entry area. If the cursor is at the lowest
allowable line when the down key is pressed, the cursor
will wrap around to the uppermost allowable line. Press
the left key to move the cursor left to the next allowable
position.
If
the cursor is at the most left position when
the left key is pressed, the cursor will wrap around to the
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