Control
Stereo
Pushbutton
on
front
panel
STEREO
MONO
Momentary
connection
to
ground
Sthl.2a—2c
Sthl.2b-20
Signalling
Stereo
Mono
Lamps
on
front
panel
STEREO
MONO
External
lamps
(24
V/BO mA)
Sthl.la—lc
Sthl.lb—lc
Floating
contacts
Sthl.6a-6b
Sthl.5a—5b
2.4.5
Pilot
Tbne
Operating
modes
Switch
ll
selects
the
following
Operating
modes:
"On”
=
(:>
:
19-kHz
pilot
tone
with
standard
amplitude
and
phase
added
to
the
multiplex
signal
”Off"
=
<:>o
:
pilot
tone
switched
off
(available
at
sync
output
St105.3bc
with
adjustable
phase)
AU
-
A4)
:
pilot
tone
with
adjustable
amplitude
(control
2
"AU”)
and
adjustable
phase
(control
19
”aq)”)
added
to
the
multiplex
signal.
Pilot
amplitude
adjustable
in
the
range
-16
dBn
to
-5
dEm
relative
to
the
+6
dEm
level
of
the
multiplex
signal.
Pilot
phase
adjustable
in
the
range
-50
to
+50
compared
with
the
standard
phase
with
respect
to
the
38—kHz
sub-
carrier.
Indication
If
the
indication
selector
1
is
in
position
PILOT,
the
pilot
level
can
be
read
on
the
lower
scale
of
meter
§.
The
indicated
value
applies
to
an
output
level
of
+6
dBn
of
the
MPX
signal
(nominal
value:
—9.5
dEm).
Trigger
output
A
constant
l9—kHz
Squarewave
voltage
of
approx.
1
V
peak-to—peak
(Zout
<
100
Q)
is
available
at
the
rear
connector
22
(contact
Sthl.3b-c),
the
phase
being
equal
to
that
of
the
pilot
tone
in
the
multiplex
signal.
R
38122
—
12