Sony APR-5001 Series Operation And Maintenance Manual page 199

STEP 11 Repeat STEPS 7 - 10 for mid speed .
The settings for
RGC
and
SGC are dependent on the
headstack used
.
STEP 12 Repeat STEPS 7
-
10 for low speed with the
exception that INPUT and RECORD
LEVEL are - lOdB below 0 VU . When us -
ing
10 kHz for calibration
,
the level is
-
12 dB below 0 VU .
6.8
.
1 RCB
The RCB provides
a control range from CO ( hex ) to
C 7 ( hex )
.
It
provides
a
shelving
2 kHz to 8 kHz boost
with decreasing control codes
. Refer to the RCB
graph
in Figure 6
-
32
.
The following settings
are made for V ^ - inch high - speed
NAB and DIN heads
.
STEP 13
Verify both tracks
are in phase for all
speeds throughout frequency
range .
6.8 SECONDARY RECORD COMPENSATIONS
30 ips Cl
15 ips
CA
7.5 ips
CA
Repro Gap Compensation
The Record Compensation Feedback ( RCB ) and the
Record Compensation Feedforward ( RCF ) provide a
means to compensate for alternative tape formula
-
tions
.
The standard factory settings should be ade -
quate for most modern high - coersivity tapes . For op -
timum results , consult Ihble 6 - 4 and set the RCB and
RCF accordingly when using
one
of the tapes listed
.
Thpes of
even less contemporary formulations and
possibly those of future formulations may require
some
adjustment
to these parameters .
( RGC )
30
ips
Cl
15 ips
CC
7.5
ips
CE
Sync Gap Compensation
( SGC )
Table
6
-
5
.
RGC and SGC Settings For
High
-
Speed 1 / 4 " NAB and DIN
Heads
The settings for RCF and RCB
will be dependent of
the type of tape used
.
<
/ 3
6.8
.
2 RCF yj
cc
=
3
Q
The RCF provides a
control
range
from CO ( hex )
to
CF ( hex )
. It
provides a shelving
8 kHz to 25 kHz
high
frequency boost with increasing control codes
.
Refer
to the RCF graph in Figure 6
-
32
.
NOTE : At the time of this printing
, C 8 ( hex ) through
CF ( hex ) are functionally identical
to CO ( hex )
through C
7
( hex )
.
UJ
8
IX
TAPE TYPE 30 IPS 15 IPS 7.5 IPS
a
a
3 M Scotch 226 RCF CO CB C 4 f
=
«
*
a
RCB Cl C 7 C 4
a
s
3 M Scotch 250 RCF
CO CB C 4
c
2
RCB C 2 C 7 C 4
<
i
LL
6.8
.
3 Adjusting the Secondary Record
Compensations
These adjustments should be left to experienced
service personnel with appropriate test equipment
.
Adjustment of these parameters should only be
considered if the tape formulation being used shows
significantly undesirable response flatness problems
that cannot be remedied
by normal
record equaliza -
tion and overbias adjustments
.
These alignments
can
only be
facilitated on Channels
1 and 2 when the
illuminated
.
They
can be stored as in any other align
-
ment procedure
.
c
2
Afga 469 RCF CO CB C 4
«
a
2
RCB Cl C 7 C 4
LL
I
-
2
<
Ampex 456 RCF CO CB C 4
RCB Cl C 7 C 4
BASF LGR 50 RCF
CO CB C 4
RCB
Cl
C 7
Cl
AFGA PER 528 RCF CO CB C 6
Track Selector button is
ALL
RCB C 2 C 7 C 2
BASF LGR 30 RCF CO CB C 6
RCB C 2 C 2 C 7
6.8
.
4
Gap
Compensation
Gap Compensation for Repro (
RGC ) and Sync ( SGC )
provide
a means to compensate for alternate
gap -
width heads
. Refer to Thble 6 - 5 for standard settings
.
In addition
,
these provide for
a degree of low freuency
3 M Scotch 176 RCF CO C 8 C 4
RCB C 2 C 7 C 4
Table
6
-
4
.
Tape Type Settings
6
-
35