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Recording
Characteristics:
Recorded Velocity
at 1 kHz:
Broad-band Surface
Noise Level:
SPECIFICATIONS
IEC Standard without treble emphasis
(constant
velocity above
1 kHz).
3.16 em/sec. r.m.s.
(Measured
by the "B-line light
pattern" method
of ASA
4.'
1 .-1960). Tolerance:
0.5 dB.
-
32 dB with reference to the signal
at
1 kHz
(-
26 dB after
equalization).
Reduced to
-
65 dB in 1/3 octave filter).
Pick-up Test Record Type QR 2008.
Dimensions:
As QR 2007/2009.
·
Speed
of
Rotation:
33 rev/min.
Program:
See Fig. 1.7.
Tolerances:
The tolerances are relative to the exact values
which are listed on p. 5 and differ slightly from
the nominal values.
Section 1:
Section 2:
Section 3 and 4:
±
o.5
dB
(cross-talk: -20
dB).
±
o.5 dB
(cross-talk:
-40 dB).
±
o.5.
dB
Section 5:
±
o.5 dB on level
at
100 Hz
(±
o.5 dB on line-
arity).
Section 6:
±
1 dB.
Response Test Unit Type 4409.
1. Synchro-starter.
Input Signal:
The starting signal
should
be
applied
to the "Filter Input" terminal
·
of Type
4409, and
should
have the following characteristics for operating the starter:
Frequency: 1<;>oo
.
Hz
±
100 Hz.
Voltage:
from o.1 to 32 V r.m.s.
at
1 kHz.
Duration:
at least o.1
second.
Operation: The
synchro-starter
opens the clutch
circuit
of the Level Recorder
when the 1ooo Hz starting signal ceases
(cuts
the circuit between pins 6 and 3
of the Remote Control 6-pin socket) thereby starting the paper drive.
Input Impedance
of
the Synchro-starter Section: 10 kQ.
2 Transistors (OC75, OC76). 3 Relays.
35
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