SIST EN 60094-5:1999/A1:1999

• Abstract:

  EN following parallel vote

• Status: Published
• Publication Date: 31-Mar-1999
• ICS: 33.160.30 - Audio systems
• Technical Committee: AVM - Audio, video and multimedia systems and equipment
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-1999
• Due Date: 01-Apr-1999
• Completion Date: 01-Apr-1999
• Ref Project: EN 60094-5:1993/A1:1996 - Magnetic tape sound recording and reproducing systems - Part 5: Electrical magnetic tape properties

• Amends: SIST EN 60094-5:1999 - Magnetic tape sound recording and reproducing systems -- Part 5: Electrical magnetic tape properties
• Effective Date: 21-Sep-2010

SIST EN 60094-5:1999/A1:1999 is the Slovenian adoption of an amendment to the European and IEC standard for electrical properties of magnetic tape in sound recording and reproducing systems, published by SIST. It updates the test conditions, measurement methods, and reference heads and tapes used to specify and check tape performance. In practice, it is aimed at people who need a common technical basis for tape testing, comparison, and conformance work.

What does SIST EN 60094-5:1999/A1:1999 specify?

SIST EN 60094-5:1999/A1:1999 amends Part 5 of the magnetic tape sound recording and reproducing systems standard. The amendment focuses on electrical magnetic tape properties, especially the way they are measured and the reference materials used for those measurements.

The document is organized as changes to Section Two, Section Three, and Appendix B. The revised material covers tables for tape configurations and reference tapes, a measurement option for noise-related work, a new clause on erasing attenuation, and updated lists of IEC measuring heads and primary reference tapes.

What are the key requirements of SIST EN 60094-5:1999/A1:1999?

• Section Two, Table II revises the tape configurations for domestic and professional use, including track arrangements, tape widths, and figure references. In practice, users must match the test setup to the correct tape format before comparing results.

• Clause 2.3 allows the psophometric curve with quasi-peak detection according to appendix A of IEC 268-1 for the electrical characteristics of test equipment. This matters because it gives laboratories an alternative, recognized weighting method for noise-related measurements.

• Table III updates the domestic reference tape entries for the stated markets and tape classes. In practice, this tells test labs which reference tape to use when they need repeatable results tied to the correct tape family.

• Table IV revises the reference bias method and keeps the alternative reference bias method linked to clause 2.6.1b). In practice, the bias setup must follow the updated table entries so that output measurements are comparable across labs.

• Clause 3.4, Reference level to bias noise ratio also permits the psophometric curve with quasi-peak detection from IEC 268-1. This keeps the noise measurement approach consistent across related test functions.

• Clause 3.8, Erasing attenuation adds a defined measurement method for how much signal remains after erasure. The tape is recorded, erased without record-head bias current, reproduced immediately, and the residual level is measured with a narrow-band filter; the result is calculated from the before-and-after voltages. In practice, this gives a clear laboratory method for checking how completely the tape can be erased.

• Tables VI, VII, and VIII are updated to include erasing attenuation as a measured parameter. That means erasing performance becomes part of the documented electrical property set for the relevant tape classes.

• Appendix B revises the lists of IEC measuring heads and primary reference tapes. For users, this is the practical source list for the specified heads and tapes needed to run the methods in a repeatable way.

What terms does SIST EN 60094-5:1999/A1:1999 define?

• Erasing attenuation - the difference, in decibels, between the recorded signal level and the residual level left on the same tape after erasure.

• Reference level to bias noise ratio - a measurement that compares the reference output level with the noise related to bias conditions.

• Psophometric curve - a weighting curve used in sound-system measurements to shape noise readings in a way that better reflects perceived loudness.

• Quasi-peak detection - a detector method from IEC 268-1 that responds to peaks with a defined time behavior rather than a simple instantaneous reading.

• IEC I - a tape classification used in the tables to identify one family of reference tape.

• IEC IV - another tape classification used in the tables to identify a different family of reference tape.

Who uses SIST EN 60094-5:1999/A1:1999?

SIST EN 60094-5:1999/A1:1999 is used by manufacturers of magnetic tape systems, test laboratories, and audio engineering teams that measure tape performance. Quality managers and conformity assessors use it when they need a common test method and named reference materials. Buyers and specifiers in audio systems also use it to understand which tape type, head type, and test setup a supplier is claiming.

What changed in SIST EN 60094-5:1999/A1:1999 from the previous edition?

SIST EN 60094-5:1999/A1:1999 is Amendment A1 to Part 5 and corresponds to IEC 60094-5:1988/A1:1996 and EN 60094-5:1993/A1:1996. The amendment updates Table II, Table III, Table IV, Tables VI-VIII, Clause 3.4, and Appendix B. It also adds Clause 3.8 on erasing attenuation.

Which standards are used with SIST EN 60094-5:1999/A1:1999?

• IEC 268-1: Sound system equipment - Part 1: General (1985) - appendix A is used for the psophometric curve with quasi-peak detection in the measurement clauses.

What does the SIST EN 60094-5:1999/A1:1999 document contain?

The amendment contains revised tabular requirements for tape formats, reference tapes, and bias-related conditions. It also adds a formal erasing attenuation method, including the test sequence, measurement approach, and calculation of the result.

Appendix B is updated with specified IEC measuring heads and primary reference tapes, which are the practical tools used to carry out the tests. The document therefore serves as a technical correction and update to the measurement framework for electrical magnetic tape properties.

SLOVENSKI STANDARD
01-april-1999
Magnetic tape sound recording and reproducing systems -- Part 5: Electrical
magnetic tape properties - Amendment A1(IEC 60094-5:1988/A1:1996)
Magnetic tape sound recording and reproducing systems -- Part 5: Electrical magnetic
tape properties
Systeme für Tonaufzeichnung und -wiedergabe auf Magnetband -- Teil 5: Elektrische
Eigenschaften von Magnetbändern
Systèmes d'enregistrement et de lecture du son sur bandes magnétiques -- Partie 5:
Propriétés électriques des bandes magnétiques
Ta slovenski standard je istoveten z: EN 60094-5:1993/A1:1996
ICS:
33.160.30 Avdio sistemi Audio systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
IEC
INTERNATIONALE
94-5
INTERNATIONAL
STANDARD
AMENDEMENT 1
AMENDMENT I
1996-02
Amendement 1
Systèmes d'enregistrement et de lecture
du son sur bandes magnétiques -
Cinquième partie:
Propriétés électriques des bandes magnétiques
Amendment 1
Magnetic tape sound recording and
reproducing systems -
Part 5:
Electrical magnetic tape properties
réservés — Copyright — all rights reserved
© CEI 1996 Droits de reproduction
Genève, Suisse
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé
Commission Electrotechnique Internationale CODE PRIX
F
International Electrotechnical Commission PRICE CODE
IEC MensgvHapoai as 3nenrpolexHHVecnaa HOMHCCHa
Pour prix, voir catalogue en vigueur •
•
For price, see current catalogue

94-5 Amend. 1 ©IEC:1996 - 3 -
FOREWORD
This amendment has been prepared by sub-committee 60A: Sound recording, of IEC
technical committee 60: Recording.
The text of this amendment is based on the following documents:
FDIS
Report on voting
60A/178/FDIS 1008/18/RVD
Full information on the voting for the approval of this amendment can be found in the
report on voting indicated in the above table.
SECTION TWO - TECHNICAL REQUIREMENTS AND INFORMATION
CONCERNING TESTING CONDITIONS
Page 11
Table II
and by
Replace the lines starting with "Domestic 6,30 mm wide" "Domestic 3,81 mm wide"
the following new lines
Four tracks two 6
Domestic Full 7 (A) 2 (N)
Full
channels
Germany
6,30 mm wide width width figure 9
nos. 1 and 3
Four tracks two 7
Domestic Full Full 4 (A)
channels Japan
3,81 mm wide width width 1,5 (B) 1 (N) figure 1
nos. 1 and 2
Add below the table: N = not specified
Page 13
2.3 Electrical characteristics of test equipment
Replace the second sentence of item i) of e) by the following:
In addition, the psophometric curve with quasi-peak detection may be used according to
appendix A of IEC 268-1: Sound system equipment - Part 1: General (1985).

94-5 Amend. 1 © IEC:1996 - 5 -
Page 17
Table Ill
by the following:
Replace the first and fourth lines under "Domestic"
4,76 3,81 Y 348 M A Germany IEC 1 Fee 03
Japan
4,76 3,81 MJ 507 A A IEC IV Metal pigment
Page 21
Table IV
Replace the first and fourth lines by the following:
+5,7 —
3,81 4,76 IEC 1 Y 348 M 120 3 180 -6,3 12
3,81 4,76 IEC IV MJ 507 A 70 3 180 +5,7 — -0,3 6
Replace, under table IV, the note "* = under consi
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