Sony APR-5001 Series Operation And Maintenance Manual page 19

SUPPLEMENT TO APR - 5000 SERIES RECORDER / REPRODUCERS
OPERATION AND MAINTENANCE MANUAL
VERSION P 4.01
.
01.1 FIRMWARE
SMPTE
Drop - Frame CHASE operations ( and
then only with specific OFFSET settings
)
, now
is corrected
.
e . A
previous condition which caused "
latch - up "
during regeneration of corrupted external Time
Code has been corrected
.
f
.
With previous software
, a reverse motion Timer
Roller
count
would jump directly to - 1 second
after passing through
zero
,
causing
a non
-
symmetric
,
non
-
monotonic Timer roller count at
that point
. A
corrected
-
0 count has now been
established between zero and
-
1 .
g
.
The Repeat function has been made safe against
incorrect
user
operation
.
h
.
Supply reel hold back tension
now is supplied in
the
DUMP EDIT mode .
1
.
INTRODUCTION
The enhanced , Version P 4.01
.
01.1 firmware describ
-
ed in this document offers three major advantages
over
previous versions in that it :
a
.
Is useable on all
APR -
5000
Series machines
b
.
Resolves specific defects that occurred with earlier
firmware versions
c . Incorporates new features into the
APR - 5000
Series machines
As well as
describing the firmware changes
( paragraphs 2
,
3 and 4 ) , this document provides
an
updated Storage Location List ( paragraph 5 . )
2
.
COMPATIBILITY
With earlier firmware versions , different sets
were re
-
quired for different machines
.
Version
P 4.01 . 01.1
,
however ,
is compatible with all APR - 5000
machine
types ,
these being :
i
. Non - recognition of
a Capstan Reference Select
change
on the 50 pin parallel port is
now cor -
rected
.
This previously occurred during brief
tran -
sitional modes in preparation of PLAY action
.
j
.
The
FADER START / FADER
START ENABLE
inputs
to the 50 pin parallel
port are
now
functional
. This operation is described in Section
3.3
.
7 of the
APR - 5000
Series Operation
and
Maintenance manual
.
Mono ,
High Speed
Mono
,
Low Speed
Stereo
,
NAB ,
High Speed
Stereo
,
DIN
,
High Speed
Stereo
,
1 / 2 "
,
High Speed
Stereo , NAB
,
Low Speed
APR
-
5002 W Stereo ,
Wide Profile
APR
-
5003
APR
-
5001
APR
-
5001 L
APR
-
5002
APR
-
5002 D
APR
-
5002 H
APR
-
5002 L
Three Track
,
High Speed
4
„
IMPROVEMENTS AND NEW FEATURES
3
.
CORRECTED DEFECTS
The improvements and new features obtained with
the enhanced firmware
are described in the follow
-
ing
pages . Paragraphs 4.1 through 4.4 deal with the
changes applicable
to all machines , while paragraphs
4.5 through
4.12 deal with those applicable
to
APR - 5003 only
.
The enhanced software corrects many of the minor
defects that occurred with earlier versions . The most
significant of these corrections are listed below
.
a . MVC
operation is improved
,
particularly when
operating under conditions of undefined radius
.
b
. A
flaw in AUTO TC ( Time Code ) mode is corrected
.
With earlier firmware versions
,
EBU synchronous
CHASE operations were
compromised when
receiving
alternating types of Time Code .
c .
Occasional false
"
loss of lock
"
indication in EBU
CHASE
is corrected
.
d
.
Momentary " loss of lock " which previously
occur
-
red at repeatable Time Code boundaries during
L -
4.1
PUNCH IN /
PUNCH OUT OPERATION
Bias/ Erase timing has been improved
so as to virtually
eliminate residual audio
gaps
in critical
punch - in /
punch
-
out operations
.
The performance improvement
is best perceived in those
areas involving punch
-
in
and punch - out over identical
,
time
-
aligned pro
-
gram material .
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