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Technical Data Studio Master Tape
(01)
Studio Master 900
04/06
Specially designed to fulfil the highest quality
requirements of
world class music studios for analogue recording
for
¾ multitrack and
¾ mastering recording.
Offering
¾ high output
¾ wide dynamic range,
¾ high level uniformity up to the highest
frequencies.
¾ low print-through and
¾ excellent DC noise
Audio Studio
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Technical Data Studio Master SM 900
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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 900
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Technical Data Studio Master SM 900
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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 7.0µm) 7.0µm
(0.25 mil) (0.25 mil (0.25 mil)
Track width 6.3 mm 6.3 mm 6.3 mm
(1/4") (1/4") (1/4")
Playback head: Studer Studer Studer 1.1
Gap length 3.0 µm 3.0 µm 3.0 µm
(0.12 mil) (0.12 mil) (0.12 mil)
Track width 2.575 mm 2.575 mm 2.575 mm
Playback equalisation 17.5 µs 50+3180 µs 50+3180 µs 1.2
(NAB) (NAB) (NAB)
RL
IEC Reference Level at 1kHz 320 nWb/m 320 nWb/m 320 nWb/m 1.3
IEC
IEC reference tape:batch MT 82472 MT 82472 A 342 D
IEC reference tape bias definition Min.THD
RB
IEC reference bias -2,2 dB -2,0 dB -1.8 dB 1.5
IEC
Min.THD
320
Rec.Bias Recommended bias setting 0.0 dB 0.0 dB 0.0 dB
∆S10 Sensitivity drop for
recommended bias setting 1.5 dB 4.0 dB 6.5 dB 1.6
Min.THD
320
1.4
320
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3. Recording Performance Specifications
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 14.0 dB 14.0 dB 11.5 dB
Saturation Output Level at 10 kHz 13.0 dB 12.5 dB 4.0 dB
SOL
10
SOL
Saturation Output Level at 12.5 kHz 2.0 dB
12.5
Saturation Output Level at 16 kHz 11.0 dB 10.0 dB
SOL
16
Maximum Twin tone Level at 10 kHz 8.5 dB 8.5 dB 0.0 dB 2.1
MTL
10
MTL
Maximum Twin tone Level at 12.5 kHz -3.0 dB 2.1
12,5
Maximum Twin tone Level at 16 kHz 7.0 dB 6.0 dB 2.1
MTL
16
S
Relative tape Sensitivity at 1 kHz 1.5 dB 1.5 dB 1.5 dB 2.2
1
Relative tape Sensitivity at 10 kHz 2.5 dB 2.0 dB 3.0 dB 2.2
S
10
Relative tape Sensitivity at 12.5 kHz 2.0 dB 2.2
S
12.5
Relative tape Sensitivity at 16 kHz 2.5 dB 2.5 dB 2.2
S
16
THD Third Harmonic Distortion ratio at RL
Third Harmonic Distortion factor at RL
THD
RL+10dB
Third Harm.Dist.factor at RL
THD
RL+6dB
Third Harm.Dist.factor at RL
Third Harm.Dist.ratio at RL
Third Harm.Dist.ratio at RL
+10dB -35.0 dB -32.6 dB 2.1
IEC
+10dB 0.56 % 0.47 % 2.1
IEC
+6dB -39.2 dB 2.1
IEC
+6dB 0.55 % 2.1
IEC
-59.5 dB -58.5 dB -55.0 dB 2.1
IEC
0.11 % 0.12 % 0.18 % 2.1
IEC
DCN DC noise,weighted, rel.to RL
Bias Noise level (IEC 94;A-weighted) -66.0 dB -62.0 dB -63.0 dB 2.3
BN
IEC
BN
Bias Noise level (CCIR 468/3-weighted) -52.5 dB -49.0 dB -50.0 dB 2.3
CCIR
MOL/BN
MOL/BN
Dynamic range 80.0 dB 76.0 dB 74.5 dB 2.4
IEC
Dynamic range 66.5 dB 63.0 dB 61.5 dB 2.4
CCIR
-59.5 dB -59.0 dB -58.0 dB
IEC
P Print-through (print-effect) 58.5 dB 56.5 dB 58.0 dB 2.5
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Technical Data Studio Master SM 900
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4. Magnetic Properties Ref.
Coercivity 29.5 kA/m 370 Oe 3.1
H
C
Retentivity 154 mT 1540 G 3.2
B
RS
Φ Saturation flux 2320 nWb/m 292 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 19.0 µm 0.75 mil 4.2
Total thickness 52.0 µm 2.05 mil 4.2
Backcoating 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 ≥ 20 N ≥ 61 MPa 4.3
Breaking tensile strength per 6.3 mm (1/4") tape ≥ 30 N ≥ 91 MPa 4.3
6. References
The data in this publication are based on test methods
described in IEC Publication 94. References are given
only in the case of deviations or particularities.
1.1 For the measurements magnetic heads are used
whose properties are 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 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 ∆S10 (Sensitivity drop for recommended bias
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 S10, the bias
is increased until the playback level is reduced by the
given value ∆S10.
2.1 MTL and THD (Maximum Twin tone Level and Third
Harmonic Distortion): For MTL measurement the
(IEC reference level): The reference level is
IEC
(IEC reference bias): These data represent the
IEC
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 dBscale can only be
used for RL
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
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 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 range): 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).
as the output level. In order to derive the
IEC
04/06
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Technical Data Studio Master SM 900
(
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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.
All data given in the specification are subject to change without prior notice due to technical progress.
7. Ordering Information
RMGI
Product
Code
Tape
Width
Inch mm ft m Inch m pcs
SM 900
34620 0,25 6,3 2.500 762 10,5 265 Metal Reel NAB Hinged 10
34720 0,5 12,7 2.500 762 10,5 265 Metal Reel NAB Hinged 6
34730 0,5 12,7 2.500 762 Pancake NAB Hinged 6
34820 1 25,4 2.500 762 10,5 265 Prec. Reel NAB Hinged 4
34920 2 50,8 2.500 762 10,5 265 Prec. Reel NAB Hinged 2
34921 2 50,8 5.000 1.524 14 360 Prec. Reel NAB Hinged 2
Tape
Length
Diameter
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
(Remanent, or residual saturation flux): the so-
3.3 Ø
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.
Reel
Reel Type/
Pancake
Hub
Type
Box
Type
Tapes/
Carton
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