GSS HDM 500 C Manuale utente
GSS
Grundig SAT Systems GmbH
Beuthener Straße 43
D-90471 Nuremberg
Phone: +49 (0) 911 / 703 8877
Fax: +49 (0) 911 / 703 9210
E-mail: [email protected]
Internet: http://www.gss.tv
Assembly Instructions
Assembly Instructions
English
HDM 500 C
Head-End Digital Modulator
A
A
CLASS
CLASS
KLASSE
KLASSE
Grundig SAT SystEms
- 2 -
- 2 -
Contents
1 Safety regulations.....................................................................................................3
2 General information .................................................................................................3
2.1 Packing contents .......................................................................................3
2.2 Meaning of the symbols used .....................................................................4
2.3 Technical data ..........................................................................................4
2.4 Description...............................................................................................5
2.5 Software query.........................................................................................5
3 Assembly .................................................................................................................6
3.1 Installing the cassette.................................................................................6
3.2 EMC regulations .......................................................................................6
3.3 Connecting the cassette .............................................................................7
4 The control panel at a glance ....................................................................................8
4.1 Menu items ..............................................................................................8
4.2 Functions of the control panel buttons ..........................................................8
5 Programming ...........................................................................................................9
5.1 Preparation ..............................................................................................9
5.2
Notes on level setting ................................................................................9
5.3 Programming procedure ..........................................................................10
5.4 Programming the cassette ........................................................................12
Selecting the cassette...............................................................................12
Selecting the channel strip........................................................................13
Selecting channel / frequency setting ........................................................13
Setting the output channel ........................................................................14
Setting the output frequency .....................................................................15
Switching the modulator off or on .............................................................15
Adjusting the output levels of the channel strips...........................................15
Setting the LNB oscillator frequency...........................................................16
Setting the input symbol rate.....................................................................17
Setting the input frequency .......................................................................17
Testing the signal to noise ratio .................................................................18
Setting the QAM modulation
...................................................................19
Inverting the user signal ...........................................................................20
Testing stuffing ........................................................................................20
Setting a substitute signal in the case of an incorrect input signal .................21
Saving settings........................................................................................21
6 Channel and frequency tables .................................................................................22
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1 Safety regulations
Caution
• Assembly, installation and servicing should be carried out by authorised
electricians.
• Switch off the operating voltage of the system before beginning with assembly
or service work or pull out the mains plug.
• Do not perform installation and service work during thunderstorms.
• Install the system so it will not be able to vibrate…
- in a dust-free, dry environment
-
in such a manner that it is protected from moisture, fumes, splashing water and
dampness
- somewhere protected from direct sunlight
- not within the immediate vicinity of heat sources
- in an ambient temperature of -20 °C to +50 °C.
• Ensure that the head-end station is adequately ventilated.
Do not cover the ventilation slots.
• Beware of short circuits
• No liability is accepted for any damage caused by faulty connections or inap-
propriate handling.
• Observe the relevant standards, regulations and guidelines on the installation and
operation of antenna systems.
• Earth the
SAT receiver in accordance with DIN EN 50083-1 / EN 60728-11
and VDE 0855 (earthed, equipotential bonding rail).
•For further information please read the assembly instructions for the head-
end station used.
Take action to prevent static discharge when working on the device.
2 General information
2.1 Packing contents
1 cassette HDM 500 C
2 HF cables
1 CD (assembly instructions)
1 Brief assembly instructions
- 4 -
- 4 -
2.2 Meaning of the symbols used
Important note
—> General note
• Performing works
2.3 Technical data
The devices meet the following EU directives:
2006/95/EC, 2004/108/EC
The product fulfils the guidelines and standards for CE labelling.
HF input
Frequency range: 950 … 2150 MHz
Level range: 60 dBµV … 80 dBµV
Input norm: QPSK
Symbol rate: 1 … 45 Msymb./s, SCPC/MCPC
HF output
Channels: S21 … C69
Frequency range: 42.0 MHz … 860.0 MHz
Output level: typ. 97 dBµV
Output impedance: 75 Ω
Connections
SAT inputs: 2 F sockets
HF output: 1 IEC socket
Connection strip (10-pin): for supply voltages and control circuits
RS 232 socket: serial interface for software update
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- 5 -
2.4 Description
The twin transmodulator cassette is a QPSK-converter, which converts all sta-
tions modulated according to DVB-S
standard and
QPSK
into two
QAM
-modu-
lated cable signals.
The
cassette
has two digital SAT IF inputs and an HF output.
It is equipped with two channel strips (“
A
” and “
B
”). Each channel strip consists
of a digital tuner, a digital signal preparation unit and a modulator.
The prepared input signals reach the HF output collector of the head-end station
via the HF output socket. The common output level of the channel strips can be
set at the output collector of the head-end station.
Two LEDs indicate if the respective channel strip is switched on (LED illuminates)
or off, and also provide an indication of the signal quality based on their
colour. Additionally the quality of the data stream received is displayed
(“CN…”).
The output symbol rate is fixed to a value of 6900 kSymb/s. If the symbol rate
being transmitted exceeds this value change to a high-order modulation (e.g.
from 64 QAM to 256 QAM).
When the head-end station is switched on, the two-line LC display shows the
software version of the control unit.
To operate this cassette the software version of the control unit must be “V 37”
or higher. You can find the current operating software for the control unit and
the cassette
,
the software “BE-Flash”
and the current assembly instructions
on the
website “www.gss.tv”.
The
cassette is
designed for use in the following head-end stations:
– STC 1200
– STC 316
– STR 19-8
2.5 Software query
Control unit
If necessary, you can activate the indication of the software version of the con-
trol unit manually:
• Press any two keys on the control unit of the head-end station simultaneously
until the display goes dark and
the software version, e.g. “
V 37
” appears.
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- 6 -
3 Assembly
3.1 Installing the cassette
– Ensure the head-end station is mounted so it will not be able to vibrate.
Avoid, for example, mounting the head-end station onto a lift shaft or any
other wall or floor construction that vibrates in a similar way.
– Before installing or changing a cassette unplug the power cable from the
mains power socket.
• Remove the fastening screws 1of an unoccupied slot from the bracket of the
head-end station.
• Insert the cassette in this slot and push it into the housing.
• Align the cassette and apply slight pressure to connect it to the connections of
the board and the HF bus bar.
• Fasten the cassette with the 1screws.
3.2 EMC regulations
To comply with the current EMC regulations, it is necessary to connect the
lines leading in and out of the head-end station using F terminals.
The attenuation of shielding of the connection lines must meet the require-
ments for “Class A”.
When mounting the cassette in a STR 19-8 head-end station which is in-
stalled in a 19” cabinet, make sure the connections leading in and out for
the 19” cabinet are made using F terminals.
0°
CASSETTE
CASSETTE
CASSETTE
CASSETTE
CASSETTE
CASSETTE
CASSETTE
CASSETTE
CASSETTE
CASSETTE
CASSETTE
CASSETTE
MESSAUSGANG
A
ACHTUNG!
Vor dem Cassettenwechsel
unbedingt Netzstecker ziehen!
CAUTION!
Before changing cassettes remove
mains plug!
A
A
CLASS
CLASS
KLASSE
KLASSE
- 7 -
- 7 -
• Insert the required number of F terminals in the openings provided in the
head-end station or in the 19
"
cabinet.
—> F terminals are not included in the scope of delivery.
Tighten the nut on the F terminal until the teeth on the lock washer have pen-
etrated the exterior coating and a good connection is made between the
housing and F terminal.
3.3 Connecting the cassette
•
Plug the SAT input cables into the SAT input sockets “
SAT input A
” 2
(channel strip “A”) and “
SAT input B
” 1(channel strip “B”).
•
Connect the head-end station to the mains power supply.
3“RS 232” socket
The operating software of the
cassette
can be updated via the 9-Pin D-SUB
socket “RS 232” using a PC or notebook and the software “BE-Flash”.
You can find the current operating software on the website “www.gss.tv”.
RS 232
SAT input "A"
SAT input "B"
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- 8 -
4 The control panel at a glance
4.1 Menu items
Program the
cassette
using the buttons on the control unit of the head-end station.
The two-line display of the control unit then shows the menus.
The parameters and functions to be set are underlined.
Use the key to select the following main menu items:
–
Cassette
– Channel strip
– Channel / Frequency selection
– Output channel / output frequency
– Level setting
– LNB oscillator frequency
– Input symbol rate
– Input frequency
– QAM modulation
– Stuffing
– Substitute signal
4.2 Functions of the control panel buttons
The key pad on the head-end station is used to scroll through the menus and
menu items one at a time:
scrolls forward through the menus
.
▶
◀/
select parameters in the menus.
set values, initiate actions.
selects sub-menus.
AUDIO
scrolls backward through the menus
.
Msaves entries.
BE–Remote V 37
please wait . . .
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- 9 -
5 Programming
5.1 Preparation
• Connect the test receiver to the HF output or the test output of the head-end
station.
• Set the output channel / output frequency of the
cassette
(page 14 / 15) and
adjust the TV test receiver to this channel / frequency.
•
Switch on the channel strip (modulator) if necessary (s. page 15). For each
channel strip, there is a status LED which indicates if the channel strip is
switched on.
• Balance the output levels of the channel strips “A” and “B” if the difference in
level is ≥1 dB (page 15).
5.2
Notes on level setting
In order to prevent interference within the head-end station and the cable sys-
tem, the output level of the QPSK-QAM module must be lowered by 10 dB
compared to analogue modulators at 64 QAM, and by 4 dB compared to
analogue modulators at 256 QAM.
• Measure the output levels of the other
cassettes
and tune them to a uniform
output level using the appropriate level controls or software dependent on the
head-end station used.
Please regard the assembly instructions of the respec-
tive head-end station.
Status-LED
Channel strip
"B"
Status-LED
Channel strip
"A"
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- 10 -
5.3 Programming procedure
Ein / On
BE–Remote
please wait …
V 37
Box 4
V 1
QPSK-C
– – –
Bx 1A
C5-12,S3-24
TWIN-SAT
C07
Bx 1A
C5-12,S3-24
TWIN-SAT
C07
Böx 4
C5-12,S3-24
TWIN-SAT
C07
Bx 5A
BD3
DVBT-DVBT
C09
+
Bx 4A
V 1
QPSK-C
S41
Bx 4A
Channel
OUTPUT
A / B
t > 10 s
Channel / Freq.
Bx 4A
S41
OUTPUT
on
▶
◀/
on / off
▶
◀/
Bx 4A
0 dB
LEVEL
Bx 4A
10600 MHz
LNB
0 … -10 dB
Indice
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