65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: +359 56 820027, Fax: +359 56 836700
E-mail: [email protected] ,Web: www.devabroadcast.com
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FRONT PANEL – READOUT SECTION (LEFT SIDE)
Phones
Phones jack to monitor the received signal. Headphones volume can be menu adjusted by going
to
Settings > Audio / MPX Outputs > Phones Volume
.
Bargraphs and LED Indicators, Select Buttons
FM Modulating Metering
– 60 segments LED bargraph indicator to visualize the highest Positive or Negative deviation
or both of them (default) as selected by the
SELECT
button. It is peak-responding, and it updates-
and-holds the highest peak. When both the
POS DEV
and
NEG DEV
indicators are lighted, the
highest deviation in either polarity is shown and this is the default display mode.
SELECT
button
also switches the bargraph to display the injection level of 19 kHz stereo pilot signal, which is
usually set to 7-8 kHz injection. Stereo
PILOT
signal is read on the lower metering scale. It is
calibrated in appropriately smaller scale then the carrier deviation.
Select Button
– used to change mode of the LED bargraph indicators and associated LED indicators. Possible
selections are
POS DEV, NEG DEV, POS DEV + NEG DEV, PILOT
.
Audio Demod Metering
– two 60 segments LED bargraphs showing
Left
and
Right
or
L+R
and
L-R
demodulated audio.
By default the
AUDIO DEMOD METERING
displays left- and right channels of the stereo pair
with the
L / R
indicator lighted. It is recommendable leaving this display in the default mode. The
SELECT
button can be used to switch the
AUDIO DEMOD METERING
display between
L / R
and
L+R
/
L-R
. Upon selecting any of the
L / R
or
L+R
/
L-R
the relevant indicator will light, but the
headphones will continue monitoring the
L / R
stereo program.
Although there are instances where the
L+R
and
L-R
bargraphs may be close in value, as a rule
of thumb, the
L-
R meter should generally lag the
L+R
meter by at least a few dB, i.e. the
L+R
sum
will always have more energy than the
L-R
difference and this applies to nearly all recorded music.
For signals where voice announcements are predominant, without background music or for other
mono sources the
L-R
indication may drop almost off-scale.
The
SELECT
button associated with the above described bargraphs, cycles amongst various
options, each of them identified with an associated LED indicator.
