Specifications
the Monitor
control
cloclavise
until it is
wide
open
while
listening
for
excessive
noise. You
should
only
hear
a faint
"hiss".
If every-
thing is O.K.,
continue. If any hurn
or excess
noise is
present,
stop
and fiy
different
ground
and
shielding
affangements
until
the
sys-
tem is clean.
NOTE:
MAKE
SURB THAT YOU
CHECKFORHUMOR
NOISE
AS
EACH INPUT OR
OUTPUT
IS
CONNECTED.
8.3
SHIELI}ING
Ah[I}
GROT]NI}ING
OF
AUI}IOEQUIPMENT
The shield
of any audio cable connection
should
be connected
at
one end
only.
If not, grorrnd loops
arrd high frcquency cross-talk
could rezult.
Connect the shield
a.s
a general
rule
to
the signal
sour-
ce
(outpu$
of anything. In high
RF
areas
it
is wise to ground
the
other end
of
the shield through
a
0.01
rnicroFarad
capacitor.
This
will
grormd
the
RF
but will not affect
audio
frequencies.
8.4 TYPICAT
INTEREACE
SITUATION
TABLE
Output
U nbal anoed
U nbalanmd
U nbal anoed
Baland
Balaned
Balanred
Different
ial
Differential
Different
ial
I nput
U nbalaned
Balaned
Different
ial
U nbalaned
Balaned
Different ial
U nbalaned
Balaned
Differential
Gonnect
shield
at:
Output
Output
Output
I nput
Output
I nput
Output
Out
put
Out
put
Use the above
table to interface
your
Axion
to any external
"quip-
ment such
as multi-ttack machines,
signal
processing,
and power
amps.
Balanced
(in
the
above
illustration)
means transformer
balan-
ced
while
differential
means electronically balanced. Therc
are
solne cases
which net better results
in
practice.
Connect one
cir-
cuit at
a
time
and check for hurn
or noise.
When connecting
balan-
ced microphones,
use
two conductor
shielded
audio cable
and
connect both
conductors and
the
shield at
both ends.
When
connecting line level cables,
use
two conductor shielded ca-
ble and
follow the instructions in
the interface
table.
The
only
ex-
ception to
these rules is with
patch
co'rds.
These
grounds
are tied
together
in the console. \tr/e
realize
that
the colaect interfacing
of
all
different equipment is
difficult, but once
goperly
installed
the
systern
will
be clean
and
noise
free.