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Technical Data Studio Master Tape
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Studio Master 911
Standard bias studio tape, specially designed for
compatibility with industry standard
for use in music studios and broadcasting for
¾ multitrack and
¾ mastering recording.
Offering
¾ high level uniformity up to the highest
frequencies and
¾ excellent DC noise
¾ excellent winding even at high speeds
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Audio Studio
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Technical Data Studio Master SM 911
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1. Recording Performance Specifications (depending on bias settings)
Tape speed 76.2 cm/s
30 ips
Recording head gap length 7.0 µm
Playback head gap length 3.0 µm
Equalisation 17.5 µs
Reference level 320 nWb/m
Tape speed 38.1 cm/s
15 ips
Recording head gap length 7.0 µm
Playback head gap length 3.0 µm
Equalisation 50+3180 µs
Reference level 320 nWb/m
Tape speed 19.05 cm/s
7,5 ips
Recording head gap length 7.0 µm
Playback head gap length 3.0 µm
Equalisation 50+3180 µs
Reference level 320 nWb/m
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Technical Data Studio Master SM 911
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Output level versus Third Harmonic Distortion Ratio at frequency 1 kHz and tape speeds 30 ips (76.2 cm/s),15 ips (38.1 cm/s)and 7
1 /2 ips (19.05 cm/s).See also Note 2.1.
Input Level versus Output Level at frequencies 1 kHz,10 kHz and 16 kHz (12.5 kHz at 7
15 ips (38.1 cm/s)and 7
1 /2 ips (19.05 cm/s)
1 /2 ips)and tape speeds 30 ips (76.2 cm/s),
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Technical Data Studio Master SM 911
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2. Measurement Conditions
Tape speed 76.2 cm/s 38.1 cm/s 19.05 cm/s Ref.
30 ips 15 ips 7.5 ips
Record head: Studer Studer Studer 1.1
Gap length 7.0 µm (0.25 mil) 7.0µm (0.25 mil) 7.0µm (0.25 mil)
Track width 6.3 mm (1/4") 6.3 mm (1/4") 6.3 mm (1/4")
Playback head: Studer Studer Studer 1.1
Gap length 3.0 µm (0.12 mil) 3.0 µm (0.12 mil) 3.0 µm (0.12 mil)
Track width 2.575 mm 2.575 mm 2.575 mm
Playback equalisation 17.5 µs (NAB) 50+3180 µs (NAB) 50+3180 µs (NAB) 1.2
RLIEC IEC Reference Level at 1kHz 320 nWb/m 320 nWb/m 320 nWb/m 1.3
IEC reference tape:batch MT 82472 MT 82472 A 342 D
IEC reference tape bias definition Min.THD
RBIEC IEC reference bias -1.0 dB 0.0 dB -1.5 dB 1.5
Rec.Bias Recommended bias setting 0.0 dB 0.0 dB 0.0 dB
∆S10 Sensitivity drop for
recommended bias setting 1.5 dB 3.0 dB 6.0 dB 1.6
3. Recording Performance Specifications (in recommended bias settings)
The table below presents the main parameters in the recommended bias setting. All figures given represent nominal values.
MOL
Maximum Output Level at 1 kHz,THD =3 % 13.0 dB 12.5 dB 10.0 dB
1/1
Maximum Output Level at1 kHz,THD =1 % 10.0 dB 9.0 dB 6.0 dB
MOL
1/3
Saturation Output Level at 10 kHz 11.5 dB 10.5 dB 0.5 dB
SOL
10
Saturation Output Level at 12.5 kHz -3.5 dB
SOL
12.5
Saturation Output Level at 16 kHz 9.0 dB 7.5 dB
SOL
16
Maximum Twin tone Level at 10 kHz 6.5 dB 6.0 dB -4.5 dB 2.1
MTL
10
Maximum Twin tone Level at 16 kHz 4.5 dB 3.0 dB -12.0 dB 2.1
MTL
16
S1 Relative tape Sensitivity at 1 kHz 1.5 dB 1.5 dB 1.0 dB 2.2
Relative tape Sensitivity at 10 kHz 1.5 dB 2.5 dB 0.5 dB 2.2
S
10
Relative tape Sensitivity at 12.5 kHz 0.5 dB 2.2
S
12.5
Relative tape Sensitivity at 16 kHz 1.5 dB 3.0 dB 2.2
S
16
THD Third Harmonic Distortion ratio at RL
Third Harmonic Distortion factor at RL
THD
RL+4dB
Third Harm.Dist.factor at RL
Third Harm.Dist.ratio at RL
DCN DC noise,weighted,rel.to RL
Bias Noise level (IEC 94;A-weighted) -63.5 dB -60.5 dB -62.5 dB 2.3
BN
IEC
Bias Noise level (CCIR 468/3-weighted) -51.0 dB -47.5 dB -49.5 dB 2.3
BN
CCIR
MOL/BN
MOL/BN
Dynamic range 76.5 dB 73.0 dB 72.5 dB 2.4
IEC
Dynamic range 64.0 dB 60.0 dB 59.5 dB 2.4
CCIR
+4dB -55.0 dB -52.0 dB -44.5 dB 2.1
IEC
+4dB 0.17 % 0.25 % 0.59 % 2.1
IEC
-54.0 dB -56.0 dB -56.0 dB
IEC
-67.0 dB -60.0 dB -51.0 dB 2.1
IEC
0.04 % 0.10 % 0.28 % 2.1
IEC
P Print-through (print-effect) 58.0 dB 56.0 dB 57.0 dB 2.5
4. Magnetic Properties
Coercivity 25.5 kA/m 320 Oe 3.1
H
C
B
Retentivity 145 mT 1450 G 3.2
RS
Φ Saturation flux 2320 nWb/m 232 mM/mm 3.3
Orientation longitudinal
5. Physical Properties
Base material Polyester
Tape widths available 6.3 /12.7 /25.4 /50.8 mm ¼, ½, 1, 2 inch 4.1
Tolerances of tape width +0.0 /-0.06 mm +0.0 /-2.4 mil 4.1
Base thickness 30.0 µm 1.18 mil 4.2
Coating thickness 16.0 µm 0.63 mil 4.2
Total thickness 50.0 µm 1.97 mil 4.2
Back coating black
Surface resistance of the magnetic coating < 10,000 MΩ < 10 GΩ
Surface resistance of the back coating < 100 kΩ
Load for elongation of 3 %(F3)per 6.3 mm (1/4") tape
Breaking tensile strength per 6.3 mm (1/4") tape
Min.THD
320
Min.THD
320
≥ 20 N ≥ 61 MPa 4.3
≥ 30 N ≥ 91 MPa 4.3
1.4
320
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Technical Data Studio Master SM 911
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6. References
The data in this publication are based on test methods
described inIEC Publication 94.References are given only
in the case of deviationsor particularities.
1.1 For the measurements magnetic heads are used
whose propertiesare very similar to the standard
reference heads specified in IEC Publication 94-5.Record
heads with a gap length of 7 µm (0.25 mil) and playback
heads with a gap length of 3 µm (0.12 mil)are required.
1.2 Playback equalisation on the tape testing equipment
is adjusted to provide a flat frequency response of the
output voltage when playing back the frequency
response section of the relevant calibration tape for the
selected tape speed and equalisation.
1.3 RL
obtained when playing back the reference level section
of the the relevant IEC calibration tape for the selected
tape speed.The reference level corresponds to a
magnetic flux in the tape per metre trackwidth of 320
nWb/m.
1.4 IEC reference tape bias definition:Using the relevant
IEC reference tape and heads according to Ref.1.1,the
bias current providing the minimum third harmonic
distortion ratio for a 1 kHz signal recorded at the
reference level is the reference bias setting.
1.5 RB
ratio of the bias for the relevant IEC reference tape (see
Ref.1.4)to the recommended bias for the tape under test
(see Ref.1.6).
1.6 ∆S
setting):Operationally, the recommended bias is set
while recording an input signal of 10 kHz at –20
dB.Based on the peak of the sensitivity curve S
bias is increased until the playback level is reduced by
the given value ∆S
2.1 MTL and THD (Maximum Twin tone Level and Third
Harmonic Distortion):For MTL measurement the
frequency distance of the primary tones is 40 Hz.During
the THD measurement the playback output is held both
at IEC reference level (see Ref.1.3), and at the
increased output level RL+...dB. From the corresponding
curves the distortion factor can be obtained directly as a
percentage of the output level.(The dB- scale can only
be used for RL
the distortion ratio in dB for increased output levels at
RL+...dB,this output level has to be subtracted from the
value read in dB.These resulting values in dB are given
in the table).
2.2 S (Sensitivity):All the sensitivity curves are
measured using a constant record current,which is
All data given in the specification are subject to change without prior notice due to technical progress.
(IEC reference level):The reference level is
IEC
(IEC reference bias):These data represent the
IEC
(Sensitivity drop for recommended bias
10
,the
10
.
10
as the output level.In order to derive
IEC
necessary to obtain an output level of approximately –20
dB for a 1 kHz input signal.A record equalisation is not
used. The distances between the sensitivity curves thus
reflect the record equalisation necessary to achieve a
flat frequency response. The values given in the table
represent the sensitivity of the tape under test at the
recommended bias.As relative sensitivity values they
refer to the the corresponding values of the relevant IEC
reference tape at its own reference bias corresponding
to the definition in Ref.1.4.
2.3 BN (Bias Noise level):The index ...IEC refers to
measurement using the weighting A-filter specified in
IEC Publication 651, while ...CCIR refers to the use of
the weighting filter and quasi peak meter specified in
CCIR 468-3.
2.4 MOL/BN (Dynamic):The signal to bias noise level
ratio MOL/BN results from the difference of the
maximum output level MOL and the bias noise level
BN.Regarding the index IEC or CCIR respectively see
Ref.2.3.
2.5 P (Print-through):Print-through is the ratio of a
reference level recording to the highest signal level
transferred to the next tape layer after 24 hours storage
at 20 °C (68 °F).
3 The magnetic measurements are made by means of a
magnetic field having a strength of 100 kA/m (1,250
Oe)in order to obtain a practically saturated
magnetisation in the magnetic material of the sample.
(Coercivity):The coercitive magnetic field
3.1 H
C
strength is required to reduce the longitudinal
magnetisation in the magnetic material to zero after the
sample has been magnetised to saturation.
(Retentivity):Retentivity is the remaining
3.2 B
RS
magnetic flux density in the magnetic material when the
magnetising field is reduced to zero after the sample has
been magnetised to saturation.
3.3 Φ
(Remanent,or residual saturation flux):the so-
RS
called "residual saturation flux"is the retentivity
multiplied by the thickness of the magnetic coating.
4.1 Tape width and its tolerances correspond to the
specifications given in IEC Publication 94-4.
4.2 Thicknesses:Values given are mean averages.
4.3 Yield strength (F3)and breaking tensile
strength:According to the methods specified in IEC
publication 94-4 the force necessary to produce
3%elongation,or to break the tape using a test sample
length of 200 mm and an elongation rate of 100
mm/min.The value given in MPa results from the
measured strength related to the cross section of the
tape sample.The strengths increase a little less than
proportionally with tape width.
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Technical Data Studio Master SM 911
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7. Ordering Information
RMGI
Product
Code
Tape
Width
Tape
Length
Reel
Diameter
Inch mm ft m Inch mm
SM 911
34110 0,25 6,3 600 183 5 130 Plastic Reel Trident Hinged 20
34111 0,25 6,3 1.200 366 7 180 Plastic Reel Trident Hinged 20
34112 0,25 6,3 2.500 762 10,5 265 Plastic Reel Trident Hinged 10
34113 0,25 6,3 2.500 762 10,5 265 Plastic Reel Trident Eco Pack 20
34120 0,25 6,3 2.500 762 10,5 265 Metal Reel NAB Hinged 10
34130 0,25 6,3 2.500 762 Pancake NAB ECO Pack 20
34140 0,25 6,3 3.280 1.000 Pancake AEG ECO Pack 10
34220 0,5 12,7 2.500 762 10,5 265 Metal Reel NAB Hinged 6
34230 0,5 12,7 2.500 762 Pancake NAB Hinged 6
34320 1 25,4 2.500 762 10,5 265 Prec. Reel NAB Hinged 4
34420 2 50,8 2.500 762 10,5 265 Prec. Reel NAB Hinged 2
34421 2 50,8 5.000 1.524 14 360 Prec. Reel NAB Hinged 2
Recordable Media Group International B.V.
P.O. Box 137
4900 AC Oosterhout
The Netherl ands
Telephone: +31-(0)162-40 89 50
Fax: +31-(0)162-46 26 11
e-mail [email protected]
Internet www.rmgi.nl
Reel Type Hub Box
or Pancake Type Type
pcs
Tapes/
Carton
04/06
03
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