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of these two devices
provide a very high
common mode
rejection input stage
.
IC 1
provides
additional
gain
and
buffering to the input of
IC 5
.
IC 5
provide
the low frequency
equalization
and
integration
required
.
The combination of IC 2 and
The second half of IC 5 and IC 3
provide
the
high frequency
characteristics
.
architecture are used
.
IC 4 is used when various
types
of head
It
provides
several different
gap
compensations by
switching capacitors
in the circuit
.
Provided also is control of
very
low
frequency
boost control
with Low End Modifier (
LEM )
defeat
.
supported by
the software since the time code channel does
not
require
these functions ( the TCC is dedicated
to the
center
. .
track time
code
channel which
type of
head and a fixed
gap compensa
These circuits
are
not
^
asi
^
ally only
uses one
The time code
signal
is then fed from the
output
of IC 3 to
IC 13 which usually performs the
output
monitor
switching
function
.
software due to the fact that there is
only one
time code
head
.
This function is also
not supported
by
the
The
output
from IC
13
is then fed to IC 8 and then to IC 12
(
1
/
2 )
.
( in the
transport assembly
)
,
of IC
8 is
then fed to IC 21
.
control of the output monitoring circuit
,
used to route the command for
dimming
of the
output circuitry
under CPU control ( another function not used for the TCC )
.
IC 46 acts as a driver to IC 43
opto
-
isolator
.
IC 12
provides a
time code
output
to be fed to the
CPU
The
output
of the second half
This
provides
the
amplitude
IC 47 and IC 32 are
O
The
Differential Line
Output Hybrid
( IC 11 )
provides a low
output impedence
and differential
output
characteristics
.
IC
9 is used as a meter
buffer
stage
and
adjustment
of meter
calibration
.
5.2
.
13
Time Code Meter Board
( TCM )
The Time Code Meter
Board contains all of the switches
and
controls
relating
to the status of the Center Track Time Code
Channel
.
The
assembly
will
only
be found on the
APR
-
5003
Series machines
,
located in the meter
housing
,
the VU meter is located on the
assembly
.
In
addition
,
5
-
20
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