SIST EN 61179:1999

SLOVENSKI STANDARD
SIST EN 61179:1999
01-april-1999
Helical-scan digital composite video cassette recording system using 19 mm
magnetic tape, format D2 (NTSC, PAL, PAL-M) (IEC 61179:1993)
Helical-scan digital composite video cassette recording system using 19 mm magnetic
tape, format D2 (NTSC, PAL, PAL-M)
Videokassettensystem mit Schrägspuraufzeichnung digitaler Composite-Signale auf
Magnetband 19 mm, D2-Format (NTSC, PAL, PAL-M)
Système de magnétoscope numérique à chrominance composite à cassette à balayage
hélicoïdal utilisant la bande magnétique de 19 mm, format D2 (NTSC, PAL, PAL-M)
Ta slovenski standard je istoveten z: EN 61179:1993
ICS:
33.160.40 Video sistemi Video systems
SIST EN 61179:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61179:1999

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SIST EN 61179:1999

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SIST EN 61179:1999

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SIST EN 61179:1999

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SIST EN 61179:1999

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SIST EN 61179:1999
NORME
CEI
INTERNATIONALE IEC
61179
INTERNATIONAL
Première édition
STAN
DARD
First edition
1993-02
Système de magnétoscope numérique
à chrominance composite à cassette
à balayage hélicoïdal utilisant la bande
magnétique de 19 mm, format D2
(NTSC, PAL, PAL-M)
Helical-scan digital composite video cassette
recording system using 19 mm magnetic tape,
format D2 (NTSC, PAL, PAL-M)
© IEC 1993 Droits de reproduction
réservés — Copyright - all rights reserved
Aucune partie
de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par
aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX X C
Commission Electrotechnique Internationale
PRICE CODE /^G
International Electrotechnical Commission
IEC
MenutyHapoiniaR 3fleKTpoTexHH4ecKap
HOMHCCHA
Pour prix, voir catalogue en vigueur
• • For price, see current catalogue

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SIST EN 61179:1999
1179 ©IEC:1993 – 3 –
CONTENTS
Page
FOREWORD 7
INTRODUCTION 9
SECTION 1: GENERAL
Clause
1.1 Scope 15
1.2 Normative references 15
1.3 Definitions, symbols and abbreviations 17
1.4 Environment and test conditions, reference tape and calibration tape 17
SECTION 2: VIDEOTAPE-CASSETTE
2.1 Mechanical parameters 21
2.2 Videotape specification 75
SECTION 3: HELICAL RECORDINGS
3.1 Tape speed 77
77
3.2 Record location and dimensions
3.3 Helical track record curvature, tolerance zones, centre lines 87
89
3.4 Relative positions of recorded signals
89
3.5 Gap azimuth
89
3.6 Transport and scanner
SECTION 4: PROGRAM TRACK DATA ARRANGEMENT
4.1 Introduction 99
4.2 Labelling convention 99
4.3 Sector details 103
4.4 Edit gaps 117
4.5 Channel code 119
SECTION 5: VIDEO INTERFACE
5.1 Encoding parameters 123
5.2 Parallel digital signal inte rface 143
5.3 Serial digital signal inte rface 153

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SIST EN 61179:1999
1179 ©IEC:1993 - 5 -
SECTION 6: AUDIO INTERFACE
Page
Clause
155
6.1 Encoding parameters
155
6.2 Digital signal interface
SECTION 7: VIDEO PROCESSING
163
7.1 Recorded data
163
7.2 Intersector distribution
163
7.3 Intrasector shuffling
173
7.4 Sector array
173
7.5 Outer code error protection
SECTION 8: AUDIO PROCESSING
179
8.1 Introduction
179
8.2 Source coding
187 8.3 Source processing
193
8.4 Auxiliary words
209
8.5 Outer error protection
211
8.6 Inner protection and channel coding
211
8.7 Order of transmission to inner coding
211
8.8 Order of audio sectors
SECTION 9: LONGITUDINAL TRACKS
213
9.1 General
213
9.2 Relative timing
213
9.3 Control track
9.4 Cue record 217
217
9.5 Time code record
Annexes
221
A Audio levels
223
B Cross-tape track measurement technique
231
C Examples of error correcting codes

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SIST EN 61179:1999
1179 ©I EC:1993 -
7 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
HELICAL-SCAN DIGITAL COMPOSITE
VIDEO CASSETTE RECORDING SYSTEM USING
19 mm MAGNETIC TAPE, FORMAT D2
(NTSC, PAL, PAL-M)
FOREWORD
1)
The IEC (International Electrotechnical Commission) is a world-wide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
Their preparation is entrusted to technical committees; any IEC National Committee interested in
the subject dealt with may participate in this preparatory work. International, governmental and
non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
2)
The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3)
They have the form of recommendations for international use published in the form of standards, technical
reports or guides and they are accepted by the National Committees in that sense.
4)
In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
International Standard IEC 1179 has been prepared by sub-committee 60B: Video record-
ing, of IEC technical committee 60: Recording.
The text of this standard is based on the following documents:
DIS
Report on Voting
60B(CO)144
60B(CO)157
Full information on the voting for the approval of this standard can be found in the report
on voting indicated in the above table.
Annexes A, B and C form an integral part of this standard.
Annex D is for information only.

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SIST EN 61179:1999
1179 ©IEC:1993 - 9 -
INTRODUCTION
The purpose of International Standard IEC 1179 is to define the electrical and mechanical
characteristics of equipment which permits the interchangeability of 19 mm cassettes
containing digitally recorded composite video programs.
The requirements given relate to 525-line composite TV signals (NTSC, PAL-M) with a
frame frequency of 29,97 Hz nominal, and to 625-line composite TV signals (PAL) with a
frame frequency of 25 Hz.
One video channel and four independent audio channels are recorded in a digital format.
The video signal may be input or output in either analog or digital format. The audio
signals may also be input or output in either analog or digital format. In addition, a cue
audio signal is recorded in analog format.
Figures 1 and 2 show a block diagram of the processes involved in the recorder.

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SIST EN 61179:1999
11 -
1179 ©IEC:1993 -
AUDIO
Outer Audio
Analog/ Audio
Analog data --► ECC -. data
digital
coder shuffle
interface block
Digital
VIDEO
Channel Outer I ntra-
Analog/
Analog --OP.
DEMUX -► ECC sector
digital
switch coder shuffle
interface
Digital
Inner
HELICAL Record
Sync./
Data
Channel
re-
.41- .4---
TRACK driver ECC
ID generator
coder MUX
and head
coder
Control track
Control track
generator
External
- - Record
time code  Time code
drivers
Time code
generator
-
- - and heads
(analog)
Recording
Cue/reference
amplifier
IEC 190193
Figure 1 - Record block diagram

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SIST EN 61179:1999
1179 ©IEC:1993 - 13 -
AUDIO
Analog/ Outer Audio ■
Audio error
Analog
digital data
.4- ECC f
conceal
•
interface deshuffle
decoder
Digital
VIDEO
Outer
Analog/
Channel •
Intra-sector
Video error
Analog .III-. .4-
DEMUX f ECC
digital Buffer
conceal deshuffle
4
switch
interface decoder
Digital
Inner Data
HELICAL Playback
Channel
Sync
routing
TRACK -4. -►
head preamp t ECC
decoder detector
switch
and equalizer
decoder
Control track
Control track
playback
Time code - Heads and
Time code
playback
reader
Time code
_ interface
(analog)
Playback
Cue/reference
amplifier
1EC 191193
Figure 2 - Playback block diagram

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SIST EN 61179:1999
1179 ©IEC:1993 - 15 -
HELICAL-SCAN DIGITAL COMPOSITE
VIDEO CASSETTE RECORDING SYSTEM USING
19 mm MAGNETIC TAPE, FORMAT D2
(NTSC, PAL, PAL-M)
SECTION 1: GENERAL
1.1 Scope
This International Standard specifies the content, format and recording method of the data
blocks forming the helical records on the tape containing video, audio and associated data
using the 19 mm type D-2 cassette. In addition, this standard specifies the content, format
and recording method of the longitudinal record containing tracking information for the
scanning head associated with the helical records.
1.2 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this International Standard. At the time of publication, the
editions indicated were valid. All normative documents are subject to revision and
parties to agreements based on this International Standard are encouraged to investigate
the possibility of applying the most recent editions of the normative documents indicated
below. Members of IEC and ISO maintain registers of currently valid International
Standards.
IEC 461: 1986, Time and control code for videotape recorders
IEC 735: 1991, Measuring methods for videotape properties
IEC 958: 1989, Digital audio interface
CCIR Volume X1 - Part 1 - Section 11A - Rapport 624-3: 1986 - Characteristics of tele-
vision systems
Lining-up and
CCITT Blue book, Volume Ill - Fascicle 111.4 - Recommendation J.15: 1988,
monitoring an international sound-programme connection
CCITT Blue book, Volume III - Fascicle 111.6 - Recommendation J.17: 1988, Pre-emphasis
used on sound-programme circuits
IEEE Standard 1952: 1953, Volume measurements of electrical speech and program waves
ISO 2110: 1989, Information technology - Data communication - 25-pole DTE/DCE
interface connector and contact number assignments

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SIST EN 61179:1999
1179 ©IEC:1993 - 17 -
1.3 Definitions, symbols and abbreviations
For the purposes of this International Standard, the following definitions apply.
1.3.1 AES: Audio engineering society.
1.3.2 ECL: Emitter coupled logic, family of digital logic integrated circuits. In this
standard, ECL refers to the 10 000 series of logic integrated circuits.
1.3.3 GF Galois field: Mathematical field containing a finite number of elements in which
algebraic operations may be performed. The number of field elements is generally written
as an argument in parentheses, e.g. GF(256).
1.3.4 LSB
1) Least significant bit of a word of data.
2) Least significant byte of a data item consisting of two or more bytes.
1.3.5 MSB
1)
Most significant bit of a word of data.
2) Most significant byte of a data item consisting of two or more bytes.
1.3.6 r.p.s.: Revolutions per second.
1.3.7 ScH: Colour subcarrier to horizontal sync timing relationship.
1.4 Environment and test conditions, reference tape and calibration tape
1.4.1
Environment and test conditions
Tests and measurements made on the system to check the requirements of this standard
shall be carried out under the following conditions:
- temperature: 20 °C ± 1 °C;
- relative humidity: 50 % ± 2 %;
- barometric pressure: 96 kPA ± 10 kPA;
- tape conditioning: not less than 24 h;
- tape tension: 0,7 N ± 0,05 N.

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SIST EN 61179:1999
1179 ©IEC:1993 - 19 -
1.4.2
Reference tape
Blank tape to be used for calibration recordings may be purchased from the following
manufacturers:

Company Part Number

Ampex Corporation Series - 319*

Sony Corporation to be determined*
1.4.3 Calibration tape
Manufacturers of videotape recorders to this format specification will sell calibration tapes
meeting the following requirements.
1.4.3.1 Record locations and dimensions
Tolerances shown in tables 4 and 5, will be reduced by 50 %.
1.4.3.2 Calibration signals
Two classes of signals will be recorded on the calibration tapes.
a) A series of conventional test signals for level calibration, consisting of at least:
- video: colour bars;
audio: 1 kHz tone at -20 dB below full level;
-
cue: 1 kHz tone at operating level;
10 KHz tone at operating level.
These test signals are contained on the following tapes:
- Sony part number 8-960-071-52 (525/60)*;
-
Ampex part number 1525058 (525/60); 1525053 (625/50)*.
b) Signals recorded on only one of the four record heads for the purpose of mechanical
alignment.
These test signals are contained on the following tapes:
- Sony part
number 8-960-071-11*;
-
Ampex pa rt number 1525052-02*.
* This information is given for the convenience of users of this International Standard and does not constitute
an endorsement by the IEC of the product named. Equivalent products may be used if they can be shown
to lead to the same results.

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SIST EN 61179:1999
1179 © I EC:1993 - 21 -
SECTION 2: VIDEOTAPE-CASSETTE
2.1 Mechanical parameters
2.1.1 Cassette dimensions
The dimensions of the three different cassettes used for recording shall be in accordance
with figures 3 to 17.
General tolerances for dimensions, except those for which tolerances are otherwise
specified, shall be as indicated in table 1.
Table 1 - Mechanical tolerances
Tolerances
From To
mm mm mm
±0,2
0 4
4 16 ±0,3
16 63 ±0,4
250 ±0,5
63
250 ±0,7
2.1.2 Identification of cassettes
The three sizes of cassettes shall be identified as:
- small: S;
- medium: M;
- large: L.
2.1.3 Tape lengths, thickness and play times
The tape length, thickness and play time for the three sizes of cassettes shall be as
indicated in table 2 for 525/60 and 625/50 systems.
Table 2 - Tape length and play time of S, M, L cassettes
Tape thickness 13 µm
Cassette
size
Tape length Play time
m min
s 253 31
M 744 93
1 647 207
L
2.1.4 Face of magnetic coating
The magnetic coating on the tape shall face out of the cassette as specified in figures 3
to 5.

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SIST EN 61179:1999
1179 ©IEC:1993 - 23 -
2.1.5 Datum planes
2.1.5.1 Datum plane Z shall be determined by datum areas A, B and C as specified in
figures 6 to 8.
2.1.5.2 Datum C does not correspond to a fastener.
2.1.5.3 Datum plane X shall be orthogonal to datum plane Z and shall run through the
center of datum hole (a) and datum hole (b) as specified in figures 9 to 11.
2.1.5.4 Datum plane Y shall be orthogonal to both datum plane X and datum plane Z and
shall run through the centre of datum hole (a) as specified in figures 9 to 11.
12
138 *
Datum plane X
Reel lock
and release
/EC 192/93
Dimensions in millimetres
NOTES
Dimensions with an asterisk (') are nominal values specifying the tape path.
1
2 Area for the reel.
Figure 3 - Top view, inner structure and tape path of the S cassette

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SIST EN 61179:1999

-
1179 ©IEC:1993 25 -
132 '2,5
Lid lock
Lid lock
and release
and release
Reel lock
and release
!EC 193/93
Dimensions in millimetres
NOTES
1 Dimensions with an asterisk (*) are nominal values specifying the tape path.
2 Area for the reel.
Figure 4 - Top view, inner structure and tape path of the M cassette

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SIST EN 61179:1999
1179 ©IEC:1993 - 27 -
IEC 794193
Dimensions in millimetres
NOTES
1 Dimensions with an asterisk (*) are nominal values specifying the tape path.
2 Area for the reel.
Figure 5 - Top view, inner structure and tape path of the L cassette

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SIST EN 61179:1999
1179 © IEC:1993 — 29 —
140,5
1 0
Datum plane X
^
r;
1 145
1
Maximum holding area ^•^•^yy^^^^^•^•^Od•^^ • ^ ^^•O^O^ ^^^^^•^^^^^•^•^•^^^^^•
^
_•.•.•.•.•.aaaaa•!aCa•!•^ ^^.•!.Qaaa•s.•.•_^.•.aa•. ;:
^•
^
^•^
.^
Support area
.^
.y
.^
^•i
Datum area
•:^`
0 10
Datum plane X ZEC 195193
Dimensions in millimetres
NOTES
1 The cassette shall be secured by the recorder and/or player unit on the crosshatched area.
2 The periphery within 1,0 mm from the edge of guiding groove B and from the edge of the casse tte shall
be removed from the support area. The cassette shall be supported by the recorder and/or player unit on
the hatched area.
3 Datum plane Z shall be determined by datum areas A, B, and C.
Figure 6 — Datum area, support area and holding area of the S cassette

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SIST EN 61179:1999
1179 © IEC:1993 -31 -
Datum plane Y-NN,1/4
140,5
130,5 ± 0,3
110
10 20
Datum plane X
q^^ i^^^:^I
q
^^^.^^ ^:c.^
^
CO
^
5 139
45 179
Datum plane Z
Guiding groove B
52
186
i:!:!:!::
Maximum holding area
® Support area
0
0
N
Datum area
0 10
Datum plane X
IEC 196193
Dimensions in millimetres
NOTES
The cassette shall be secured by the recorder and/or player unit on the crosshatched area.
1
tte shall
2 The periphery within 1,0 mm from the edge of guiding groove B and from the edge of the casse
be removed from the support area. The cassette shall be supported by the recorder and/or player unit on
the hatched area.
3 Datum plan Z shall be determined by datum areas A, B, and C.
rt area and holding area of M cassette
Figure 7 - Datum area, suppo

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SIST EN 61179:1999
1179 © IEC:1993 - 33 -
Datum plane X
Maximum holding area
® Support area
Datum area
fr
0 10
Datum plane X
/EC 197/93
Dimensions in millimetres
NOTES
The cassette shall be secured by the recorder and/or player unit on the crosshatched area.
1
2 The periphery within 1,0 mm from the edge of guiding groove B and from the edge of the casse tte shall
be removed from the support area. The cassette shall be supported by the recorder and/or player unit on
the hatched area.
3 Datum plane Z shall be determined by datum areas A, B, and C.
Figure 8 - Datum area, support area and holding area of L cassette

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SIST EN 61179:1999
1179 ©IEC:1993 - 35 -
0.1
0 5 +
0
Datum plane Y
Datum hole (a)
User hole 146,5 ± 0,3
(see figure 15)
130,5 ± 0,3
124
Datum plane X Min. 5
6
Lid lock
N
and release
o
(see figure 23)
Coding hole ^
+i 30° (2x)
User hole
^
ô Lr)
CO (see figure 15)
+1
ô
N
5+0.1 (6
o x)
0
+1
Datum hole (b)
o
User hole
(see figure 15)
Guiding groove B.
Depth: 2 0
- 0,5
r''
-,Guiding groove A
x
0
Depth: 3 ± 0,1
•o
o
+
0,1
fd5
^
± 0.2
25
o Reel lock
^
^a+
../
\--and release
User hole
(see figure 20)
(see figure 15) 67 ±
±
109
0,2'
19+0,7.
153 + (3,7
- 0,3
- 0,3
(172)

Max. R 0,5'
Max. R 0,5
Section AA. Section BB
rEC !98/93
Dimensions in millimetres
Figure 9 - Bottom view of S cassette

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SIST EN 61179:1999
1179 ©IEC:1993 — 37 —
Datum plane Y
05+0,1
0
37,5 ± 0,3 171,5 ± 0,3
Datum hole (a)
User hole
Min. 5
146.5 + 0,3
\
(see figure 16)
130,5 ± 0,3
Min. 5
Lid lock 124
Min. 5
and release
(see figure 23)
Datum plane X
Lid lock
and release
N
(see figure 23)
0
+1
^
+ 0,1 (6 x)
9 ' 0
Q
Datum hole (b)
leD User hole
(see figure 16)
+ Guiding groove B
.^^ Depth: 2 -
0,5 .1
q \
to- C °
II
,.„,mwsz.m.g.
1144
25 ± 0,2
67 ± 0,2^
±
0,2
109
129,5 ± 0,2
0 ,7
60+
- 0,3 0,7
194 +
0,3
-
(254)
Max. R 0,5
Max. R 0,5 Max. R 0,5
Section BB Section CC.
IEC 199193
Dimensions in millimetres
Figure 10 — Bottom view of M cassette

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SIST EN 61179:1999
1179 © IEC:1993 - 39 -
Datum plane Y
63,5 ± 0,3 197,5 ± 0,3
F37,5 ± 0,3 171,5 ± 0,3
Min.5 ' r ±
146,5 4.4_1■Ain. 5
0,3
L
± Min.
Min. 5 5
130,5 0,3 I
di-k.
124 Min. 5
Lid lock
Lid lock
6
and release
7 iii--- and release
(see figure 23)
(see figure 23)
°° (2x)
3
CodiCoding hole U)
User hole I
(see figure 17)
9 (6 x)
Q 5+ 0,1 n' ^ 5 + fi t
o
^
Datum hole (a) ço
N y
Datum hole (b)
\
O User hole
■L^ User hole
+1
(see figure 17)
(see figure 17)
c., tr)
CT
6
+ ,
cô
1
0 ^ os^2+1.
B
N
1.— —
ibx o
0
-s
Guiding groove A
Depth: 3 ± 0,1
C
± 0,2 5 +
.25 0.1
° \Guidingroove B groov
, 2 „r, _User hole
67 ± 0
j (see figure 17) Depth: 2 °
+ 02_ - 0,5
I 23,5 ± 0,2 1
s.+ 157,5±02
116 + 0,7 _ l _
250 + 0.7
r - 0,3
- 0,3
(366)
Max. R 0,5
Max. R 0,5
Section AA
Section BB Section CC
IEC
200193
Dimensions in millimetres
Figure 11 - Bottom view of L cassette
2.1.6 Window and labels
2.1.6.1 Window and label areas shall be as specified in figures 12 to 14.
2.1.6.2 Labels attached to the cassette shall not extend beyond the external dimensions
as shown in figures 12 to 14.
2.1.6.3 Labels shall not interfere with the identification holes of the users or the
manufacturers.

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SIST EN 61179:1999
1179 © IEC:1993 -41 -
2.1.6.4 Labels shall not interfere with the hub drive and support mechanism.
N O
+
CV
N
Note 1
Window area/ label area
5
Datum plane Z 6 139
—\■ 90
I.
Q.
!IMMENSE MIN
W^^^ ^,^
^ ^^^ ^^
CD -^^ ^^4^a.^A^R^.^^^^i^1^^^^^^•^^^_
^^^^^^^^^/►^^^^^^^^^^^ -^
^• u
^ ^ ^   ^^ ^ y ^ ^ ^^^ ^^ , ^
Xpt, K^^//1
^-
, '• • • • • ♦ / • ^ `^ ♦ ♦•• ♦J , ^
Note 2
Depth: 0,2 to 0,3
__ 3 + 1,5
2 e figure 19)
3+ 1.5
22 +
0
0
0
L67 ± 0,2
33 ± 0 3
Picker notch
Min. 140
Note 5 Picker notch
Max. 138
Depth: 0,2 to 0,3
Max. 4
142 8 "
+ 0.3 ■
+ 0,3
0
Note 2
o
Depth: 0,2 to 0,3
Detent and
141
misinsertion notch
o
Configuration-optional
user plug (2)
Details of A
1EC 201193
Dimensions in millimetres
NOTES
1 The crosshatched area is available for the window/labels.
2 The side label may be attached to this recessed area.
3 The rear label may be attached to this recessed area.
4 The lid label may be attached to this recessed area.
5 The top label may be attached to this recessed area.
Figure 12 - Top and side view of S cassette

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SIST EN 61179:1999
1179 ©IEC:1993 -43-
Datum plane Y
co
^ ^
C+i
Co Co ^
o
Note 4
c
4±1
+1
Depth: 0,2 to 0,3
Co
Datum plane Z
N p
4 user plugs
(see figure 16)
Note 1
cNU
N
Window area/ label area
46 6 6
4
Datum plane X 180
6 ,
—co
c6 '9 (2k)
+1
N
O
+1
b
O ^
O
N `^
O
3+ 1,5
22 3 + 1 , 5
0
22+^
o
/^ 0
^\
-33 ± 0,3
Note 2
Min. 200
'(see figure 19) \
Depth: 0,2 to 0,3
Max. 179
Max. 45 + 0 .7
194
- 0,3 Note 2
(254)
Depth: 0,2 to 0,3
Note 3
90°
Depth: 0,2 to 0,3
° 1,5
`+ 8+0.4
Q-/'
N 0
N
38±3 co
^ N
15, Section BB
C^
200 +
Detent and
misinsertion notch
^-"\ Configuration-optional
, user plug (2)
Details of A
IEC 202193
Dimensions in millimetres
NOTES
1 The crosshatched area is available for the window/labels.
2 The side label may be attached to this recessed area.
3 The rear label may be attached to this recessed area.
4 The lid label may be attached to this recessed area.
5 The top label may be attached to this recessed area.
Figure 13 - Top and side view of M cassette

---------------------- Page: 28 ----------------------

SIST EN 61179:1999
1179 © IEC:1993 - 45 -
Datum plane Z
Datum plane Y
i
OD (V p
i° ,n Note 4 +
cri
Depth: 0,2 to 0,3 C° 0, +1 :.c^
I N ,
^ i^ ^
I
Datum plane X
Datum plane Z
Details of C
22 +
0 0
Note 5
33 ± 0,3
Depth: 0,2 to 0,3
Min. 300
Note 2
Max. 235 Depth: 0,2 to 0,3
1,5
Note 3
Depth: 0,2 to 0,3 90°
1
+
8 0,4
0
80 ± 7
/—
280+
Detent aand 0
misinsertion notch
Configuration-optional
_user plug (2)
Details of A
203/93
IEC
Dimensions in millimetres
NOTES
1 The crosshatched area is available for windows/labels.
2 The side label may be attached to this recessed area.
3 The rear label may be attached to this recessed area.
4 The lid label may be attached to this recessed area.
5 The top label may be attached to this recessed area.
Figure 14 - Top and side view of L cassette

---------------------- Page: 29 ----------------------

SIST EN 61179:1999
1179 ©IEC:1993 - 47 -
2.1.7 Identification holes
2.1.7.1 There shall be two sets of identification holes; one for use by the manufacturer
and the other for the user.
2.1.7.2 The dimension and location of manufacturers' coding holes, specified in
figures 15 to 17 shall be defined as follows:
2 shall be used in combination to indicate tape thickness according to the
Holes 1 and
following logic table:
Hole numbers: 1 2
00= 16 pm tape
0 1 = 13 pm tape
1 0 = undefined/reserved
1 1 = undefined/reserved
NOTE - Only 13 µm tape is recognized for the purposes of interchangeability.
Holes 3 and 4 shall be used to indicate the coercivity of the magnetic recording tape
according to the following logic table.
Hole numbers: 3 4
0 0 = class 850
0 1 = class 1 500 (metal particle)
1 0 = undefined/.reserved
1 1 = undefined/reserved
NOTES
1 Only class 1 500 is used for the purposes of interchangeability.
A "0" in tables for holes 1 through 4 indicates that the indicator tab is removed or open, which results
2
in an undetected state by the recorder/player sensor mechanism.
17 are
The dimension and location of the users' coding holes specified in figures 15 to
defined as follows.
When a "0" state exists, the user holes shall identify the following conditions:
a) total record lockout (audio/video/cue/time code/control track);
b) reserved and undefined;
video and control track record lockout;
c)
d) reserved and undefined.
The user plug mechanism shall withstand an axial force of 0,5 N.
2.1.7.3

---------------------- Page: 30 ----------------------

SIST EN 61179:1999
1179 ©IEC:1993 — 49 —
Datum plane Z
Datum plane X
/ Datum plane Y
User plug (4)
130,5
User plug (3)
I
67
+i
N
Detection level (1)
n
Detection level (0)
User plug (1)
User plug (2)
Section CC
User hole (1)
Coding hole (3)
C•--67 ± 0,2--- Coding hole (2)`
User hole (2) I Coding hole (4)
Coding hole (1) \
•
Max. R 0,7 (4x)
_ ,I Zink
In
C
O O
I'
A 4 +0,1
u -H +i
0 "1"-
c7 Ln
N N
l
I,
Min. 1,8 (plug)
/I►
\1^Zill II I I I I I
Min. 3 (hole)
DJB^^'
.^ ^
Retails of A
1
D ^A
Datum plane X •
130,5 ± 0,3
User hole (3)
User hole (4).
Datum plane Z
Detection level (1)
(datum hole) •
(datum hole)
Detection level (0)
!EC 204193
Dimensions in millimetres
NOTES
1 The cassette shall be provided with four coding holes (1) to (4) and four user holes (1) to (4). When
any plug is removed, the opening shall be as shown in detail A.
User holes (3) and (4) on the upper shell shall be opened when user plugs are removed.
2
3 All cassettes shall be provided with holes as defined by sections DD and CC.
Figure 15 — S cassette coding holes and user holes

---------------------- Page: 31 ----------------------

SIST EN 61179:1999
1179 ©IEC:1993 — 51 —
Datum plane Z
Note 3
Min. 18 Detection level (1)
Datum plane X
Datum plane Y
/
User plug (4)
f
130,5
User plug (3)
67
Cr)
O
ia
Detection level (1)
^
^
N
Detection level (0)
O
User plug (1)
Section CC
User plug (2)
User hole (1)
Coding hole (3)
Coding hole (4)
Max. R 0,7 (4x)
Min. 1,8 (plug)
Min. 3 (hole)
Details of A
Datum plane X
User hole (3)
(datum hole)

Datum plane Z
level (1)
' Detection
User hole (4)
Detection level (0)
(datum hole)
IEC 205193
Dimensions in millimetres
NOTES
1 The cassette shall be provided with four coding holes (1) to (4) and four user holes (1) to (4). When
any plug is removed, the opening shall be as shown in detail A.
2 User holes (3) and (4) on the upper shell shall be opened when user plugs are removed.
3 All cassettes shall be provided with holes as defined by sections DD and CC.
Figure 16 — M cassette coding holes and user holes

---------------------- Page: 32 ----------------------

SIST EN 61179:1999
1179 ©IEC:1993
— 53 —
Datum plane Z
Datum plane X
Note 3
Datum plane Y
User plug (4)
Min. 18 ,Detection level (1)
,i
130,5
67
User plug (3)
•
Detection level (1)
Detection level (0)
User plug (1)
User plug (2)
Section CC
User hole (1)
67 ± 0,2
Coding hole (3)
Coding hole (4)
Max. R 0,7 (4x)
Details of A
Datum plane X
Detection level (1)
Detection level (0)'
'°
..."!F^Tl^^
• a^^
0
IEC 206/93
Dimensions in millimetres
NOTES
1 The cassette shall be provided with four coding holes (1) to (4) and four user holes (1) to (4). When
any plug is removed, the opening shall be as shown in detail A.
2 User holes (3) and (4) on the upper shell shall be opened when user plugs are removed.
3 All cassettes shall be provided with holes as defined by sections DD and CC.
Figure 17 — L cassette coding holes and user holes

---------------------- Page: 33 ----------------------

SIST EN 61179:1999
1179 ©IEC:1993 - 55 -
2.1.8 Leader/Trailer tape
2.1.8.1 The cassette shall include leader and trailer tape. When attached to the hub,
there shall be a length of 300 mm ± 30 mm between the splice point and the outside of the
cassette shell.
2.1.8.2 The leader/trailer tape material shall be polyester or equivalent having a trans-
missivity of at least 60 % when measured with a 700 nm to 90
...