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HD Radio Delay (Optional):
An optional plug-in circuit board allows
the composite/MPX output of the DA-
VID IV to be delayed from 1ms to 9.999
seconds in 1ms increments, relative to
the analog and digital program line
outputs when they are set to the 20kHz
(Flat) output mode. When set to either
of the FM modes, the line outputs are
subjected to the programmed delay as
well.
THE USER INTERFACE
Front-Panel:
A front-panel graphic display
and jog-wheel allow menu-guided
in-
situ
setup and operation of the DAVID
IV. LED-bar displays indicate in/out
levels and audio processing action.
Web Interface:
The IP network port enables full remote
setup and operation of the DAVID IV
over a local network or the Internet us-
ing any computer, tablet or smart
phone browser. No additional software
is required. SNMP operation is fully
supported.
MISCELLANEOUS
Test Tone Generator:
20Hz–20kHz, pre- or post-processing;
60dB attenuator.
AC Mains Requirements:
105–130VAC or 210–255VAC, 50/60Hz;
8 watts.
Size:
H: 1¾in/44mm, W: 19in/483mm,
D: 13in/330mm (1U).
Weight:
9lb/4kg (net), 12lbs/5.4kg (shipping).
Environmental:
Continuous operation guaranteed at
ambient temperatures between
32°F/0°C and 122°F/50°C; 0-95% relative
humidity, non-condensing; altitudes to
10,000ft/3048m.
Conformances:
EN50081-1
EN50082-1
93/68/EEC
2002/95/EC
BLOCK DIAGRAM
The DAVID IV is entirely DSP-based with virtually all its functionality pro-
vided through firmware coding. Our Block Diagram on the following page,
on the other hand, has been deliberately organized as if the DAVID IV were
an
analog
processor. It is our expectation that this surreptitious measure
on our part will provide the reader with a more familiar and understanda-
ble functional representation of this fine product. This means of clarifica-
tion does imply a good deal of ‘literary license,’ however, so do be advised
that the illustration is not an accurate representation of the actual signal
path of all those mischievous ones and zeroes.
“Sit emptor confundi!”
