Kathrein UFD-78 User manual

KATHREIIM
SATELLITEN
TVU-RECE IVER
UF D-/8
ELLITE RECEIVING SYSTEM m@
Ag ie a
requency Synthesized Tuning
SERVICE MANUAL

ERONT
PANEL
CONTROLS
1.POWER
key
Press
the
POWER
key
to
turn
the
receiver
on
or
off(stand-by
mode).
When
the
receiver
is
off,
it
is
possible
for
your
TV
to
still
have
off
air
reception.
The
LNB
remains
powered.
2.
UP
/DOWN
ARROW
key
Press
the
UP
and
DOWN
arrow
keys
to
change
channels
in
sequence.
The
current
channel
is
displayed
in
the
three
digit
LED.
An
L
indicates
the
channel.is
locked
(Parental
Control
Feature).
3.IR
sensor
Infrared
remote
control
sensor.
4,
WIDE
indicator
When
the
wide
indicator
is
lit,
4
wide
audio
bandwidth
4s
selected.
When
the
indicator
is
off,
a
narrow
audio
bandwidth
is
selected.
5,
HOR
indicator
When
the
HOR
indicator
is
lit,
horizontal
polarization
is
selected.
When
the
light
is
off,
vertical
polarization
is
selected.
<
FRONT
PANEL
LAYOUT
>
MASOCRO
SATELLITE
RECEIVER
SRE-9OR
6.
VIDEO
FRFQ
indicator
When
the
video
frequency
mode
is
selected
by
the
remote
control
unit,
the
VIDEO
FREQ
indicator
lights
and
the
three
digit
LED
displays
video
tuning
frequency.
7.
AUDIO
FREQ
indicator
When
the
audio
frequency
mode
is
selected
by
the
remote
control
unit,
the
AUDIO
FREQ
indicator
lights
and
the
three
digit
LED
displays
the
audio
subcarrier
frequency.
8.
STAND-BY
indicator
When
the
receiver
45
switched
off,
the
STAND-BY
indicator
ae
When
the
receiver
is
on,
the
STAND-BY
indicator
turns
off.
9,
Three
digit
LED
indicator
The
three
digit
LED
indicator
displays
channel,
video
channel
frequency
and
audio
subcarrier
frequency
depending
on
the
mode.
The
receiver
always
defaults
to
the
CH
mode.
The
video
frequency
will
not
display
leading
"1"
for
the
data
more
than
1000MHz.
ceaviDEO
FREQ
cS
AUDIO
FREQ
o>
STAND-BY

The
necessary
rear
panel
connections
on
your
receiver
are
shown
below.
Please
make
sure
your
antenna,
polarizer,
and
LNB
are
correctly
installed,
and
your
antenna
js
aligned
to
the
selected
satellite.
Contact
your
dealer
for
further
information
on
the system
configuration.
< Rear Panel Connections>
LNB
LNB
OO
=
4 Polarizer
\)
Sed Ber SR a eT Se
SKY DECODER CONNECTOR
PIN ASSIGNMENT
Audio Out
Audio In
errr rere rrr rrr rrr
Control
Video Out
B.B. In
F -type
Connector
P lug
F-type fy
Connector £1)
P tug
Ferrite Polarizer
CLAMP/UNCLAMP
and FLAT/DE-EMP
Standard TV Antenna for external decoder,
Digital
Decoder etc.
V ideo Audio
Audio IN (Unbalanced)
| “01
]
i Monitor TV Set Monitor TV Set Monitor TV Set

ADIUUSTMENT PROCEDURE
|. MEASURING INSTRUMENTS
To peform adiustments on the receiver model SRE-90R, the measuring instruments
shown below are required.
All instruments shall be calibrated.
a) DVM (Digital Voltmeter)
Measuring range : 0.1 to 500 V AC
0.01 to 100 V DC
b) Oscilloscope /“Synchroscope
Measuring range : 0.01 to 10 V/Div.
Frequency range : DC to 20 MHz
Probe : 10:1
c) TV test signal generator (PAL system)
(Used as video signal source)
d) Audio signal generator
(Used as an audio signal source)
Frequency range : 50 Hz to 15 KHz
e) RF signal generator
(Used as a RF signal source)
having wide FM deviation and CCIR REC. 405, 625-line video pre-emphasis
functions.
Frequency range : 950 to 1,750 MHz
FM deviation > 16 MHz P-P
Output level : -65 to -28 dBm
f) Signal generator
(Used as an audio subcarrier source)
having frequency modulation and audio 50u second pre-emphasis functions.
Frequency range : 5 to 8 MHz
FM deviation : 1 MHz maximum
g) Distortion muter
Measuring range : 0.01 to 3 % min
0.1 to 1 Vrms
Frequency : 400 Hz

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II. MEASURING INSTRUMENTS CONNECTION
TV test
signal
generator
RF signal
generator
Audio
signal
generator
RF signal
(95 0NtH2-1750MHz)
Audio subcarrier
signal generator
Audio signal Audio subcarrier
(50Hz - 15KHz) (5MHz - 8. 5MHz)
Oscilloscope
IMPORTANT : If the receiver is connected to the AC power, do not connect the
RF
signal
generator
directly
to
the
“RF
INPUT”
terminal
of
the
receiver.
The
RF signal generator may be damaged by the +15V powering voltage from the
receiver. Be sure to use the “DC CUT” coupler.
Ill. AUDIO SIGNAL. ADJUUSTMENT
Distortion adjustment
1. Set the receiver as follows.
AFC : ON position
POLARIZATION : any position
AUDIO WIDE’NARROW : Wide position
CHANNEL > Channel 15
VIDEO FREQUENCY > 1347 MHz
AUDIO FREQUENCY : 6.50 MHz
AUDIO OUTPUT LEVEL : MAX (USING REMOTE CONTROLLER)
2. Set the RF signal generator as follows. (TV test signal generator OFF).
Frequency > 1347 MHz
Output level : -50 dBm level at receiver input.
3. Set the audio signal generator and subcarrier as follows.
Frequency >: 6.50 MHz
Diviation : +75 KHz
Modulation : 400Hz
4. Rotate variable capacitor C236 to its minimum position at “AUDIO OUT”.