Owner's Manual

Recording
an
analogue guitar signal
using
both
inputs
..---------l
Line
1/P
Recording
Medium
Line
1/P
Mic
selected as input
Amp
In
this instance, should you
want
to record the
signals
digitally, the stereo output of the
digital
card [if installed)
will
mirror
the
MAIN
and
01
outputs
[left
and
right
respectively).
If recording
through
a desk
or
other
low-latency
environment,
a stereo mix
with
backing
tracks
and
guitar
can
be
sent back to
ISA
One
's
CUE
MIX
inputs to
allow
a
latency-free
headphones
mix
for
the
guitarist
[as in
diagram
1).
If recording to a
DAW,
a mono backing
tracks
mix
can
be
sent to
ISA
One, via the
EXT
IP
(as in
diagram
2).
However, this
will
make the
second channel of the
digital
card's stereo
output
become the EXT
IP
signal
and not the
DIIP,
meaning the
mic'd
and
direct
guitar
signals
must
be
recorded using the analogue connections shown above.
Specifications
Mic
Input
Response
•
Gain
range=
OdB
to
60dB in
10dB
steps+
20
dB of
variable
gain
• Input Impedance, variable
as
follows
:-
Switched
Impedance
setting
Equivalent Input Impedance
at 1kHz
Low=
6000
ISA110
= 14000
Med =
24000
High=
68000
•
EIN
[equivalent input noise)= -126dB measured at
60dB
of gain with 1500
terminating
impedance and 22Hz/22kHz band-pass
filter
Noise at main
output
with
gain at
unity
(OdB)
= -97dBu
measured
with
a 22Hz/22kHz band-pass
filter
•
Signal to noise
ratio
relative
to max headroom [9dBu) = 106dB
•
THO
at
medium
gain [30dB) =
0.0009%
measured
with
a 1kHz -20dBu input
signal
and
with
a 22Hz/22kHz band-pass
filter
Frequency response at
minimum
gain
[OdB)
= -0.5dB down at
10Hz and -3dB down at 125kHz
Frequency response at
maximum
gain [60dB) = -3dB down at
16Hz
and -3dB down 118kHz
CMRR=98dB
(Channell,
1kHz,
maximum
gain
with
+24
dBu input)
Crosstalk
Channel to
Channel:
with
10dB01kHz
input
to chA, chB
output
=104dBrA. With
10dB010kHz
input to chA,
chB
output=
84dBrA
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