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Panel Indicators, Switches and Connectors
FRONT PANEL – LEFT AND RIGHT AREAS
The DB4004 front panel can be provisionally divided into two main areas – Left Area and Right
Area. A brief description of controls and switches, indicators and displays located in both areas is
given below. For detailed information please refer to “Operation” on page 19.
Left Area
At the extreme left is located the Phones connector. Next to them are the sub areas of
FM
MODULATION METERING
and
AUDIO DEMOD METERING
with the appropriate
SELECT
buttons and LED indicators. Both areas contain 60 segments LED bargraphs. The upper one is
used to indicate the Total Deviation, the Positive or Negative deviations divided each other and the
Pilot signal as well. The lower bargraphs are used to show the demodulated audio according to the
mode selected by the
SELECT
button on the left of them.
Right Area
OLED Display
– signals received by DB4004 can be viewed and analyzed by the built-in OLED display. This is
the display to visualize all the measurements of the received signal and show the various DB4004
settings.
Soft Buttons
– used to navigate through the menus, quickly access the parameters, modes and functions and
to alter their values. Their functions vary in accordance with the selected menu. On the bottom side
of the OLED display are located Soft Buttons indicators and they alter their meaning following
the function currently selected by the Soft Buttons. Pressing of a Soft Button, causes a visual
effect of pressing the appropriate button on the OLED Screen. Soft Buttons will be referred as
SB1
(leftmost one),
SB2
,
SB3
and
SB4
(rightmost one) further in this manual.
Navigational Buttons
–
UP
and
DOWN
,
LEFT
and
RIGHT
and
OK
buttons are used for frequency selection and
similarly to the
Soft Buttons
to navigate through the menus selecting various functions and
parameters of the DB4004.
