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3.1 Microphone Record Level Controls L 0 and R ©
Knobs © 1 and (2) are for setting the record level of the left and right
channels (respectively) of a stereo microphone connected to the
MICROPHONE input. When setting the record level, the master con-
trol ©should be pushed to the left all the way to the stop, the peak
level limiter remaining out of circuit for the moment. The correct record
level has been achieved when the corresponding level indicator reg-
isters 0 dB at the loudest passages to be recorded. The LIMITER switch (7)
may then also be pressed. The peak level limiter will thus be in circuit
and will prevent overloading the tape by reducing the record signal to
a manageable level for the duration of the signal peaks that may be
incurred. The function indicator beside the respective level meter will
always light up when the peak level limiter is in operation. Lighting up
briefly and in not too rapid succession indicates that the limiter is oper-
ating properly. Lighting up often or constantly indicates an incorrect
record level setting that may easily occur during microphone recordings
when the distance from the microphone is decreased. The degree of the
overload is shown on the record level meter (see also sec. 3.4). The
record level setting may be acoustically checked by making a test re-
cording and monitoring through headphones with the MONITOR but-
ton (9) switched from TAPE to SOURCE position (see also sec. 3.7).
3.2 Radio/Phono Record Level Controls L (3) and R ©
Knobs (5) and © are for setting the record level of the left and right
3. Operating Controls and Their Functions
channels (respectively) of stereo input sources connected to the RADIO
or PHONO input sockets. When setting the record level, the master
control (D should be pushed to the right all the way to the stop. The
remaining procedure is as described in sec. 3.1.
3.3 Master Control (5) for Fading in, Out or Over from Radio/
Phono Inputs to Microphone Input during Record
This slide control has a middle click-position from which - once the
record level has been set - radio or phono inputs may be blended over
to record from the microphone (see sees. 3.1 and 3.2). Fading in, out
or over of all input sources connected and switched on may be con-
tinuous and completely click-free. With the master control in middle
position all input sources are switched out of circuit.
3.4 Record Level Meter ©
The record level meter has two separate indicator systems which
register peak values for the signal to be recorded. The upper indicator
system registers the record level of the left channel, the lower system
that of the right channel.
The record setting decisively influences the quality of the recording.
Setting the level too low (under-recording) impairs the signal-to-noise
ratio that may be achieved because signal strength will not be able to
cover the tape hiss sufficiently.
Setting the record level too high (overloading) increases harmonic
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