Teac A-3340 - OUTPUT LEVEL AND FREQUENCY RESPONSE; SPECIFIED OUTPUT LEVEL SET; FREQUENCY RESPONSE MEASUREMENT

SPECIFIED OUTPUT LEVEL SET
NOTE
Connect
a
10
kohm
load
to
the
LINE
OUT
jacks
when
not
using
the
TEAC M-826A (0 dB = 0.775V) level meter.
9.
Play
the
400
Hz
tone
in
section
1
of
the
test
tape.
This
tone
is
recorded
at
operating
reference
level
(1%
of
the
THD
level).
THD: Third Harmonic Distortion
10.
Turn
the
OUTPUT
controls
full
clockwise,
and
adjust
VR
201/203
for
-2
dB
reading
on
level
meter.
11.
Then
turn
OUTPUT
controls
until
a
-8
dB
reading
is
obtained
on
the
level
meter
OUTPUT
jacks.
NOTE
This
is
the
specified
output
level
set.
Do
not
disturb
this
setting
until
the
©
remaining
adjustments
have
been
completed.
|
VU
METER
CALIBRATION
~PLAYBACK-
———S————a—
12.
While
playing
the
400
Hz
tone
(1%
THD)
in
section
1
of
the
tape,
-adjust
VR
202/204
for
reading
of
0
VU
on
the
VU
meter.
EREQUENCY
RESPONSE
13.
Play
the
test
tones
from
15
kHz
down
to
40
Hz.
(Recorded
at
10
dB
below
operating
reference
level.)
14.
Compare
the
readings
obtained
on
the
level
meter
with
the
response
limits
given
in
Fig.
7-3.
15.
In
case
of
any
deviation
in
the
response
curve,
check
head
azimuth
alignment,
clean
the
heads,
then
adjust
VR
101/102
for
the
best
response.
NOTE
7-1/2ips
tape
speed
must
be
used
for
frequency
response
checks
and
adjustments.
Do
not
attempt
these
adjust-
ments at 3-3/4ips or 15ips.
50 700 500 K
FREQUENCY
IN
Hz
D-0sTé
Fig.
7-3
Frequency
Response
Limits
-Playback-