Stacker destacker .pdf


Nom original: Stacker_destacker.pdfTitre: SDS_DiSEqC_01.cdrAuteur: Samantha Bransgrove

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Stacker De-Stacker
and SDS Line Amplifier
Enabled

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Product Overview
DiSEqC Stacker De-Stacker(SDS) allows two satellite bands
(0.95-2.15GHz) to be transmitted via a single common
coaxial cable, between the LNB/multi-switch feeds and the
satellite receivers (STB).

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Combining of the bands is implemented in “Stacker” with
frequency UP conversion of one of the satellite signals (SAT)
and combining it with the other (SATTV). The second signal,
SATTV is not converted and can carry terrestrial signals
(15-860MHz) in addition to the satellite band.
The combined signal from the “Stacker” is distributed via the
common cable and split into the original two signals in “DeStacker”, which also DOWN converts one of the bands
(SAT) to the original frequencies. Terrestrial is made
available on one of the “De-Stacker” ports.
Automatic Slope Compensation allows the unit to cover
cable lengths of up to 30 metres. Extendable to cover cable
lengths up to 60 metres with the addition of an SDS Line
Amplifier.

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Powering of the system is provided from a separate 20V
power supply connected to “De-Stacker” to avoid any
switching problems from the Set-top box (STB).

PVR

Typical DTH Installation Diagram
Global Invacom Ltd., Winterdale Manor, Southminster Road,
Althorne, Essex. CM3 6BX England.
Tel: +44(0)1621 743440 Fax: +44(0)1621 743676 Sales@globalinvacom.com

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Stacker De-Stacker and SDS Line Amp
Enabled
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PSU

60m

9x4
Multiswitch
SPORT

HUMAX

9x4
Multiswitch
Typical MDU Installation Diagram

Applications
The SDS has been designed to allow two satellite signals to be fed down one coaxial cable before being returned to its original configuration to
feed two STB’s or a twin tuner satellite STB. Signals can be supplied by either a universal multi-port LNB or more typically from a multiswitch. By
allowing DiSEqC commands to pass through the “Stacker” it is possible to connect the unit to a DiSEqC multiswitch for operation on a 9 wire
system.
Whilst the DiSEqC SDS can be used in DiSEqC applications, it can also be used in situations where DiSEqC is not present.
The SDS can be used for coaxial cable lengths up to 30 metres, however from 30 to 60 metres the SDS Line Amplifier must be fitted. Reliable
operation is determined by the position of the amplifier, quality of coaxial cable fitted and signal strength from LNB or multiswitch.

Specification
DeStacker

Stacker
RF I/P SAT

950 – 2150MHz

RF O/P SAT

949-2149MHz

RF I/P SATTV

15 – 2150MHz

RF O/P SATTV

15-2150MHz

COM (Common Output) Port

15-3700MHz

COM (Common Output) Port

15-3700MHz

Min RF I/P Signal Level's

-41dBm (+68dBµV) *30m
-39dBm (+70dBµV) with *60m and
line amplifier installed in the common
cable

Noise Figure

19dB

Return Loss

10dB min at port A, B and COM
for specified frequency ranges.

MAX RF I/P Signal Level's

-14dBm (+95dBµV) total power

Isolation Port to Port

40dB min

Noise Figure

18dB

Power Supply

External +20V/1.2A Switch
Mode Power Supply.

Return Loss

10dB min at SAT, SATTV and COM

Power Consumption

100mA

Isolation Port to Port

40dB min

Communication Protocols Accepted

Voltage, Tone, DiSEqC 1.2

Output DC power for LNB
(multi-switch)

400mA Max

Power Consumption

100mA

*Using Professional ‘Twin Screened’ 75 Ohm Coaxial Cable.

SDS Line Amplifier
Frequency Range

2.5MHz – 860MHz & 950MHz 3700MHz

Insertion Gain

Terrestrial:
Satellite:
950MHz
2150MHz
2500MHz
3700MHz

-1dB ± 1 dB
+5dB ± 1dB
+6dB ± 1dB
+9dB ± 1 dB

Satellite:
950MHz
2150MHz
2500MHz
3700MHz

6dB max
5dB max
4.5dB max
4.3dB max

Noise Figure

GIDS26111058SDS-Di-01

-6 dB min

Supply Voltage

10.5V to 21V

Current Passed

Max 650mA including the SDS
current draw.

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