SOLIDYNE 462
dsp – broadcast digital processor
Page 9
Chapter 2
Advanced installation
2.1 Power supply
•
The AC voltage variation must stay smaller to
10%. Otherwise, uses an UPS.
Always
CHECK
the correct position of the
VOLTAGE SELECTOR
(200/240 V o 100/130
V, according to the country)
AC wires do not have to be mixed with audio
wires, especially with analogical ones.
Remember that all audio installation must
have a trustworthy grounding. We
recommend accomplishing with the
effective norms - Article 810 of the National
Electricity Code (NEC); ANSI/NFPA Nº 70-1984 in
USA; IRAM 2379 and 2281-3 in Argentina. This
norm provides information and guidelines for a
consistent grounding.
2.2 On mounting
•
462dsp/AM can be mounted in a standard rack
of 19”; or can be used on a table. Rubber tops are
provided with the unit. Do not place the unit on
unstable surface or shelf; the apparatus could fall,
causing damages to someone and to be damaged
the unit.
•
The ambient temperature must stay between
5ºC and 40ºC. Avoid direct solar ray incidence on
the processor or proximity of heat sources.
•
The openings and grooves allow the circulation
of air inside the unit. These openings do not have
to be blocked nor covered, not to obstruct the
refrigeration of the internal components.
•
462dsp/AM has internal protection against RF
fields, which allows locate it next to transmitters
(AM or FM). Avoid strong electromagnetic fields
(power transformers, big motors, etc).
2.3 Analogical audio connections
Inputs and outputs are electronically balanced.
The inputs are “bridging” type, with impedance
greater than 10 KOhms. The connectors used, as
is standard, are female XLR-3 for the inputs and
male for the outputs.
Take specially care with the phase. Connect
always BOTH channels of stereo input.
•
Use one pair shielded audio cables of GOOD
QUALITY, preferably with double shielding. The
maximum length recommended is 30 meters,
although in special cases it is possible to achieve
100 meters accepting a little loss at high
frequencies.
•
The connection of this cables are made as is
standard. See the following table:
Balanced input/output connections:
1 = GND
2 = balanced positive phase (+)
3 = balanced negative phase (-)
Unbalanced connection:
Inputs:
Signal = 2
;
Ground = joint 1 and 3
Outputs:
Signal to pin 2; leave
pin-3 unconnected
.
Ground = pin 1
If some residual humming exists when the system
is on the air, turn off the processor. If the humming
disappears, check the input connections.
However, the humming stays (and only
disappears disconnecting the output cables), this
would indicate some problem with the grounds.
