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1.
DESCRIPTION
Brtiel & Kjcer
Copenhagen
Denmark
Stereophonic
Gliding Frequency
Recor~
20-20000 c/s
Type OR 2009
0
45
r.p.m.
,6_
Frequency Swaaps: Logarithmic 20 c/s
to
20 kc/s
in
50
seconds
Start Marking (20 c/s point)
:
Cease of the 1 kc/s signal preceeding each band
Recording Characteristic: IEC Standard No.3 without
treble
emphasis
(constant
velocity above 1
kc/s)
.
·
Recorded Velocity at 1 kc/s: 2.24 cm/s
r.m.s.
in
45°
modulation
(3.16
cm/s in lateral
and
vertical modulations)
Bands 1 and 5:
45°
left modulation (A)
Bands 2 and 8:
45°
right modulation (B)
Bands 3 and 7: lateral modulation (A+B)
Bands 4 and 8: vertical modulation
(A-B)
Fig.
1.8.
Label of the QR 2009.
B
~
AtB
~
A
8
A+B
A-
B
Pig. 1.9. Section of the QR 2009 showing the succession of gliding frequency
bands
preceded
by
a
1
kHz start
and
reference signal.
8
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