Dante Inovonics 541, Installation & User Manual, Page: 13 / 56

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AC Mains Power
The 541 employs an internal ‘universal’ switchmode power
supply that accommodates mains voltages between 88V
AC
and
264V
AC
. Certified self-protection circuits have replaced the
once-familiar fuseholder.
If you need to replace the North-American mains plug with an-
other, you will find that the individual cord conductors are col-
or-coded in one of two ways. US standards specify black for AC
‘hot,’ white for AC neutral and green for earth ground. Europe-
an CEE standards specify brown for AC ‘hot,’ blue for AC neu-
tral and green with a yellow stripe for earth ground. It is essen-
tial that you to follow this coding to ensure product safety.
Radio Frequency
Interference
(RFI)
Although it is expected that the 541 will be co-located with
other radio equipment, do practice care and common sense in
locating the unit away from abnormally high RF fields.
Ground Loops
A mains frequency or RF ground loop could possibly be formed
between cable shield grounds and the AC power cord ground.
If hum or similar invasive noise is noted in analog outputs, a
‘ground-lifting’ AC adapter may remedy the problem, although
the chassis must somehow be returned to earth ground for
safety. Rack-mounting the chassis normally satisfies this re-
quirement.
INPUTS, OUTPUTS AND PORTS
Antenna
Input and
Considerations
The rear-panel
ANTENNA
connector is a female, 75-ohm F con-
nector. While the F is a common connector in the US, adapters
to other connector types are readily available worldwide.
Factors guiding your selection of an antenna will include the
level and purity of the off-air signal. Selectivity of the 541 is
remarkably good, but the ultra-wideband nature of the receiver
may still require you to insert an outboard band-pass or band-
stop filter in certain situations where the 541 and high power
transmitters are co-located.
High Level
Input
The rear-panel
HIGH LEVEL RF INPUT
is a 50-ohm-terminating
BNC input meant to connect directly to a transmitter or coupler
tap as an alternative to off-air signal reception. Maximum in-
put voltage should not exceed 5Vrms. Input selection is made
under the LCD-touchscreen or Webpage
Tuner
menus.
Multiplex or
Pilot Sync
Output
The rear-panel
MPX OUT
BNC connector delivers either the FM
baseband signal or a 19kHz stereo pilot-sync sample. Mode se-
lection and output level adjustment is made under the LCD-
touchscreen or Webpage
Setup
menus. The output may be var-
ied between 1Vpp and 6Vpp.
Analog
Line Outputs
LEFT
and
RIGHT ANALOG OUTPUT
s on the rear panel are elec-
tronically-balanced. This means that they are ground-referenc-
ed and not transformer-isolated. These outputs have a resistive
source impedance of 200 ohms. Output levels are expressed in