of
+6
dEm
without
pilot
tone
at
the
MPX
outputs.
AF
generator
In
the
positions
L,
R,
L
=
R
and
L
=
—R
of
switch
1,
the
built-in
AF
generator
is
connected
to
the
inputs
corresponding
to
the
switch
labelling.
The
amplitude
is
+6
dEm.
Preemphasis
The
preemphasis
can
be
switched
on
and
off
with
pushbutton
5.
In
normal
Opera-
tion
the
button
is
pushed
in,
i.e.
the
preemphasis
is
switched
on.
It
can
also
be
changed
over
between
75
us
and
50
us
by
changing
capacitors.
The
mono
output
(M
=
L
2
R
section
cancels
the
preemphasis
switched
into
circuit.
has
always
a
flat
frequency
reSponse,
since
a
deemphasis
Note
for
measurements
with
discrete
frequencies
A
preemphasis
of
50
us
increases
the
voltage
by
13.6
dB
at
15
kHz.
Thus
the
maximum
input
voltage
(AF)
should
be
no
more
than
—1
dEm,
in
order
not
to
exceed
the
overdrive
limit
of
+l2.5
dEm.
In
the
case
of
75
us
preemphasis,
the
maximum
input
voltage
is
-4.5
dEm.
Signal
indication
The
level
of
the
left
or
right
channel
can
be
observed
on
the
upper
scale
of
meter
6
with
switch
7
in
position
"L”
or
"R".
The
measurement
range
can
be
extended
by
+10
dB
with
slide
switch
g.
2.4.2
MPX
l
and
MPX
2
OutEuts
Connections
The
coded
signal
(MPX
or
multiplex
signal)
is
available
in
unbalanced
form
at
two
parallel-connected
outputs
via
two
buffers.
MPX
1
Bum
(lg)
StiOl.7b-c
MPX2
BuSO
(3;)
StiOl.7a-c
(25)
Level
adjustment
The
output
voltage
is
fixed
to
a
nominal
level
of
+6
dBm
referred
to
the
nominal
input
level
and
the
corresponding
position
of
attenuator
switches
g,
Q
and
E.
The
pilot
component
is
added
during
level
measurement.
R
38122
-
lO