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Fostex G16 - Page 46

Fostex G16
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by
depressing
the
|
•
|
(period)
key
every
time.
To
memorize
the
“
CAL
”
mode,
depress
the
[STO|
(store)
and
then
¡METER|
key.
And
adjust
METER
CAL
(R206)
for
a
OdB
reading
on
the
recorder
LED
bargraph
meter.
f
g
6)
Calibrate
tracks
2
~
16
in
the
same
way.
7)
Put
the
meter
mode
back
to
“
normal
”
mode.
4.3.3
Reproduce
Level
Calibration
1)
Put
Dolby
NR
ON/OFF
SW
to
OFF
position.
2)
Playback
the
Reference
Level
Section
(IKHz,
-
lOdBV)
of
the
Reproduce
Alignment
Tape,
such
as
Fostex
Model
9200
test
tape.
tp
-
v
3)
Connect
a
level
meter
to
test
point
TP-4,
on
the
TRACK
1
of
the
R/P
amplifier
PCB
Assy,
and
adjust
REP
LVL
(R202)
so
that
the
level
is
245mV
(-12.2dBV).
4)
After
these
adjustments,
connect
the
level
meter
to
the
recorder
rear
panel
OUTPUT
jack
1
and
check
that
the
level
is
-lOdBV
(0.3V)
±ldB.
5)
After
checking
of
the
OUTPUT
jack
level,
confirm
that
the
meter
reading
is
OdB
±ldB.
If
the
reading
is
not
OdB
±ldB,
repeat
the
adjustments
in
the
previous
section,
Item
4.3.2.5.
6)
Calibrate
tracks
2
~
16
in
the
same
way.
4.3.4
Checking
the
Reproduce
Frequency
Response
1)
Put
Dolby
NR
ON/OFF
SW
to
OFF
position.
2)
Playback
the
Frequency
Response
section
of
the
Reproduce
Alignment
Tape.
3)
Plug
in
a
level
meter
to
the
OUTPUT
jack.
The
normal
playback
frequency
response
should
be
within
±3dB
for
a
frequency
range
of
40Hz
~
18
KHz.
If
it
is
not
within
the
spec,
adjust
REP
EQ
(
1
^^(11
:
)
.
C^Xol)
4.3.5
Bias
Leakage
Check
Two
bias
trap
modules
are
provided
for
each
channel.
One
is
in
the
first
stage
of
the
reproduce
amplifier
and
the
other
in
the
output
stage
of
the
record
amplifier.
43

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