Terra SRM523, SRM543 User Manual

dSCR (Digital satellite cable router) multiswitches SRM523, SRM543

EN

Product description

Cascadable single cable multiswitches SRM523 and SRM543 is intended for the distribution of satellite and terrestrial

signals for up to 32 satellite tuners or receivers on each outputs pair.

The series consist of:

SRM523 has 1 pair subscribers outputs (2 outputs) and 1 signal processor.
SRM543 has 2 pairs subscribers outputs (4 outputs) and 2 independent signal processors.

The multiswitches have 4 passive SAT IF and 1 active Terrestrial TV trunk lines and 4 x DC power modes for convenient

DC powering options (see chapter „Installation instructions”).

The device ensure an independent access for every subscriber to any SAT IF or Terrestrial TV trunk line.

These multiswitches automatically detect SCR/dSCR mode or legacy format from the receiver. The dSCR switches also
feature fully automatic level control, negating the need for any gain or level adjustments in most installations. It’s built into a
zinc alloy die cast housing for extreme interference immunity. The housing of multiswitches meets more stringent screening
requirements according to EN50083-2, class A.

Control according to EN50494/EN50607 (SCR/dSCR) as well as Legacy (+13 V/+18 V/22 kHz) commands.

According to the standard ETSI EN 303 354 V.1.1.1, TERR TV band amplier of multiswitch type is Launch, selectivity clasication 0.

Safety instructions

Installation of the multiswitch must be done according IEC60728-11 and national safety standards.

The multiswitch is powered from the stabilized power supply +20 V. This voltage is not dangerous to life.

External power supply must have a short circuit protection.

Any repairs must be made by qualied personnel.

To avoid damaging of the multiswitch do not connect the supply voltage until all cables have been connected correctly.

The device shall be mounted in vertical position with RF input connectors on the top side on a wall or other nonamable

surface.

The multiswitch must be xed with steel screws Ø 4-4.5 mm. The screws are not included in a package.

Do not expose multiswitch to moisture or splashing water and make sure no objects lled with liquids, such as vases,

are placed near or on the unit.

Avoid placing the multiswitch next to central heating components or direct sunlight and in areas of high humidity.

No naked ame sources, such as lighted candles, should be placed on multiswitch.

If the multiswitch has been kept in cold conditions for a long time, keep it in warm room no less than 2 hours before powering.

The ventilation should not be impeded by covering the multiswitch with items, such as newspapers, table-cloths, curtains.

The mains socket of external power supply must be easily accessible.

IMPORTANT WARNINGS!

Before connecting any products to a system, it is essential to make sure the system power supply is switched o󰀨. Avoid
short-circuit or overload of any power supply. Never “HOT-SWAP” any system components as this may result in damage to
the newly introduced or existing components.

The SRM523 and SRM543 multiswitches are intended only for indoor installation or installation in a suitable weatherproof
outdoor cabinet (in this case ensure good ventilation conditions).

These multiswitches must not come into contact with moisture or be installed in areas of high humidity or heat.

Suitable for moderate and tropical climates.

Always mount the multiswitch securely to a wall or bulkhead panel so it cannot hang or swing on its coaxial cables as this
may strain the internal circuit board and components.

Always connect all of the coaxial cables to the multiswitch before connecting the power. These units are not designed to
be “HOT-SWAPPED” or connected to a live system.

Always be sure that connecting cables shield and multiswitch functional grounding clamp have common potential before
powering the system. Floating voltages can be created in an un-earthed system which may cause damage and can be dangerous.

Momentary short-circuit of any cables may be enough to damage the sensitive electronics within the multi-switch or the
connected system.

Always allow plenty of ventilation around the multi-switch and do not allow it to be covered with materials such as loft insulation.

We recommend at least 5 cm of airspace around the multi-switch. Digital products can get hot to the touch and require

a ow of air to avoid overheating.

SRM523 and SRM543 multiswitches is designed only to work with Ku band Quattro LNBs.

LNB’s and other system equipment connected to the multiswitch SAT H,Lo and H,Hi trunks inputs/outputs can be powered
from the same power supply as the multiswitch.

To avoid damage not covered by warranty DO NOT EXCEED MAX. CURRENTS. See “Technical characteristics”
for max. current for external equipment.
DO NOT OPERATE THE DC POWER TO H TRUNK LINES SWITCH (see Figure 1, pos.17) unless you totally

understand the power demands of the system and conrmed they are 2 A or less. ALWAYS LEAVE THE DC
POWER TO H TRUNK LINES SWITCH IN THE "OFF" POSITION when inserting SRM523, SRM543 into an

existing multiswitch installation. Damage caused by current overload is not covered by the manufacturer’s warranty.

This product complies with the relevant clauses of the European Directive 2002/96/EC. The unit must be recycled or discarded

according to applicable local and national regulations.
Equipment intended for indoor usage only.

Functional grounding. Connect to the main potential equalization.

This product is in accordance to following norms of EU: EMC norm EN50083-2, safety norm EN60065, RoHS norm EN50581.

This product is in accordance with Custom Union Technical Regulations: “Electromagnetic compatibility of technical equipment“
CU TR 020/2011, “On safety of low-voltage equipment“ CU TR 004/2011.

Vers. 1.02

This product is in accordance with safety standard AS/NZS 60065 and EMC standards of Australia.

1

External view

1716

10

15 11 12 18

13 14

17

16

15 11 12 18

SRM523 SRM543

DC IN 20V

1

2

3

4

5

Terr.
TV

H,Hi

V,Hi

H,Lo

V,Lo

DC IN
20V 2A

Power ON

dSCR multiswitch SRM523

Frequency SAT TV
range Terr. TV
Trunk loss SAT TV
Terr. TV
Current consumption 2 0 V 270mA max

dSCR / Legacy
+Terr.TV
DC IN

2

1

On

DC to H lines

950-2150 MHz
47-790 MHz

< 3 dB
< 1 dB

Off

Terr.
TV

H,Hi

V,Hi

H,Lo

V,Lo

6

7

8

9

10

1

2

3

4

5

DC IN 20V

Terr.
TV

H,Hi

Frequency SAT TV
range Terr. TV

V,Hi

Trunk loss SAT TV
Terr. TV
Current consumption 2 0 V 510mA max

H,Lo

V,Lo

DC IN
20V 2A

Power ON

dSCR multiswitch SRM543

2

Pair A

950-2150 MHz
47-862 MHz

dSCR / Legacy
+Terr.TV
DC IN

1

On

DC to H lines

< 3 dB
< 1 dB

2

Pair B

Off

Terr.
TV

H,Hi

V,Hi

H,Lo

V,Lo

1

6

7

8

9

Figure 1. External view of the multiswitches

1 – Terrestrial TV trunk input
2 – H, Hi trunk input
3 – V, Hi trunk input
4 – H, Lo trunk input
5 – V, Lo trunk input
6 – Terrestrial TV trunk output
7 – H, Hi trunk output
8 – V, Hi trunk output

11 – Legacy/dSCR output2 (SRM543 pair A) (Legacy/UB+Terr.TV)
12 – Legacy/dSCR output1 (SRM543 pair A) (Legacy/UB+Terr.TV)
13 – Legacy/dSCR output2 (SRM543 pair B) (Legacy/UB+Terr.TV)
14 – Legacy/dSCR output1 (SRM543 pair B) (Legacy/UB+Terr.TV)
15 – DC 20V power input
16 – Power ON indication LED
17 – DC power to H trunk lines switch

18 – Ground clamp
9 – H, Lo trunk output
10 – V, Lo trunk output

All sockets are “F” type.

Installation instructions

Read the safety instruction rst.

Fit multiswich on mounting place and connect it (pay attention to the multiswitch inputs and Quattro LNB outputs marking), connect

the isolated 75 Ω loads to the unused RF output F sockets, power on multiswich using one of 4 powering modes (see Table 1).

Table 1

”DC power

Powering mode

1. Multiswich powered from local PSU (20 V)
via DC input

(see Figure 1, pos. 15) . (Recommended for use is
PS202F 20 V PSU).
H trunk lines are DC isolated from it.

2.Multiswich is powered from local PSU (20 V)
via DC input and with DC passing to H trunk
lines.

In this mode H trunk lines can power in cascade
other multiswiches (without PSU, with “DC to H
trunk lines” switch ON)

to H trunk lines
switch” position

(see Figure 1, pos.21)

OFF

ON

Warnings and notes

Recommended as rst choice.

WARNING: BEFORE CONNECTION
ALWAYS CHECK DC POWER TO H TRUNK
LINES SWITCH (see Figure 1, pos.17). IT
MUST BE IN POSITION "OFF"!
Note: All trunk lines preserve DC bypassing.

WARNING: Don’t overload PSU via H trunk

lines – check total system power consumption
of multiswich and from H trunk lines (including
all other equipment connected).
Check all other system equipment connected
to H lines if it can accept 20 V. SERIOUS

DAMAGE OF IT CAN OCCUR!

2

3. Multiswich is powered from H trunk
lines:

- building new SCR/dSCR system (18 V - 20 V)

ON

WARNING: Don’t exceed the current capability of system
power supply.

SERIOUS DAMAGE CAN OCCUR IF OVERLOADED!

- upgrading old legacy systems (15 V - 18 V)

4. Multiswich is powered from Legacy/
dSCR (subscriber) outputs

(see Figure 1, pos. 11-14).
Each dSCR output circuit is individually
powered directly from STB’s or from dSCR
power inserter (with 22 kHz bypass).

OFF

WARNING: MULTISWITCH WILL DRAW CURRENT AND
POWER FROM PAIR OUTPUT WITH HIGHER
VOLTAGE! If STB’s connected to Legacy/dSCR outputs

can’t supply su󰀩cient power for it’s own output – dSCR

power inserter with 20 V PSU should be used (one per out
put of pair A or B).
WARNING: Don’t exceed the current capability of power
inserter and dSCR outputs (800mA max.). SERIOUS DAM

-

-

AGE CAN OCCUR IF OVERLOADED!
Note: Terr. TV amplier can be powered from H trunk lines

(15-20 V) to minimize current consumption from STB and
keep Terr. TV operation when all STBs are OFF.

Power ON indication LED (see Figure 1, pos. 16) glows Green at any of the 4 powering modes.
Then switch on receiver(s). The multiswitch will begin the process of auto-detecting which type(s) of receiver connected.

All subscriber outputs are congured to connect legacy STB (supports +13V / +18V/22 kHz signals), but it switches to

dynamic mode SCR/dSCR if receives a DiSEqC command according EN50494/EN50607.

Set the highest frequency UB for STB located nearest to the multiswitch and lowest frequency for STB farthest to the

multiswitch. If you install less than max. possible STB’s use lowest frequencies rst.

Disconnect RF cables or STB‘s from necessary outputs to reset to legacy / Start mode.

PIN code

All User Bands (UB) are protected by PIN Code to prevent the set of UB from being used/disturbed by another user (see Table 2).

Default settings

1. SAT IF inputs are congured to use Ku-band Quattro LNB (SAT A, LNB Lo=9750/10600 MHz).

2. All outputs are congured to connect Legacy STB (+13 V/+18 V/22 kHz), but it switches to Dynamic mode SCR/dSCR

if receives a DiSEqC command according EN50494/EN50607. Output User Bands (UB) are the same in all subscriber
outputs (see Table 2). ). All user bands are turn o󰀨 (Start mode).

3. PIN Codes (see Table 2 and see chapter "Conguration").

4. Only one UB plan is set depended of delivery region, if you need another plan see chapter "Conguration" or contact
TERRA UAB.

5. DC power to H trunk lines switch (see Figure 1, pos. 17) in position “OFF”.

Table 2

Marking: v.0 Marking: v.1 Marking: v.2

User

Band

(UB)

UB0 46 1210 1210

UB1 1 40 1210 1210 40 1210 no 46 1420 1420

UB2 2 40 1420 1420 40 1420 no 46 1680 1680

UB3 3 40 1680 1680 40 1680 no 46 2040 2040

UB4 4 40 2040 2040 40 2040 no 46 1006 1006

UB5 5 40 1284 1284 40 no 985 46 1057 1057

UB6 6 40 1516 1516 40 no 1050 46 1108 1108

UB7 7 40 1632 1632 40 no 1115 46 1159 1159

UB8 8 40 1748 1748 40 no 1275 46 no 1261

UB9 9 40 no 970 40 no 1340 46 no 1312

UB10 10 40 no 1010 40 no 1485 46 no 1363

UB11 11 40 no 1050 40 no 1550 46 no 1471

UB12 12 40 no 1090 40 no 1615 46 no 1522

UB13 13 40 no 1130 40 no 1745 46 no 1573

UB14 14 40 no 1170 40 no 1810 46 no 1624

UB15 15 40 no 1330 40 no 1875 46 no 1731

UB16 16 40 no 1370 40 no 1940

PIN

Code

Bandwidth,

MHz

Central frequency,

MHz

EN50494 EN50607 EN50494 EN50607 EN50494 EN50607

Bandwidth,

MHz

Central frequency,

MHz

Bandwidth,

MHz

Central frequency,

MHz

Conguration

The default setting of the device can be changed using dedicated programmer and software.

These multiswitches can be congured up to 32 User Bands (UB) per pair outputs (SRM543 total 64 UB) for use with

STB’s supporting DiSEqC commands according to standards EN50494/EN50607 (SCR/dSCR) as well as Legacy (+13 V/+18
V/22 kHz) commands. Default settings Dynamic mode can be changed to Static mode.

PC Windows software can be free downloaded from www.terraelectronics.com.

3

Output conguration must be the same per pair of outputs, but can be di󰀨erent in others pairs. Each pair of outputs is

congured separately. Pay attention to the numbering of outputs.

Some possible outputs pair congurations shown in Table 3:

Table 3

Output 1 Output 2

8 SCR/dSCR UB + up to 24 dSCR UB + Terrestrial TV

Legacy + Terrestrial TV

8 SCR/dSCR UB + up to 24 dSCR UB, PIN protected + Terrestrial TV Legacy + Terrestrial TV

Static mode (up to 32 converted transponders) + Terrestrial TV Legacy + Terrestrial TV

8 SCR/dSCR UB + Static mode (24 converted transponders) + Terrestrial TV Legacy + Terrestrial TV

See programmer user manual for more information.

Recommended accessories

1. Power supply PS202F

2. Power inserter PI012

3. Multiswitch programmer PC102W

Technical characteristics

Type SRM523 SRM543

Frequency range SAT IF 950-2150 MHz

Terr. TV 47-862 MHz

Number of trunk inputs SAT IF 4
& outputs Terr. TV 1
Number of tap outputs 2 (1 pair) 4 (2 pairs)

Return loss / impedance > 10 dB / 75

Input level SAT IF 60-95 dBµV
Terr. TV IMD3=60 dB 96 dBµV max.

Terr.TV noise gure 6 dB

Tap output user bands (dSCR mode) congurable 32 max. per pair outputs
with combined DTT user band bandwidth (dSCR mode) congurable 20-60 MHz
dSCR mode output level,

AGC controlled
legacy mode output level, typical 78 dBµV

Terr. TV gain 8 dB 4 dB
Terr. TV output level IMD3=60 dB 104 dBµV max. IMD3=60 dB 100 dBµV max.

Trunk output loss SAT IF < 3.0 dB
Terr. TV < 1.0 dB
DC pass through SAT IF 2 A max., 1 A max. through one line

trunk lines Terr. TV 250 mA max.
Decoupling SAT IF inputs/SAT IF inputs > 30 dB

SAT IF inputs/tap outputs > 30 dB
SAT IF/ Terr. TV > 25 dB
Current from DC input* 20 V 270 mA max. 20 V 510 mA max.
consumption from H trunk lines 15 V 370 mA; 18 V 310 mA; 15 V 700 mA; 18 V 580 mA;

20 V 270 mA 20 V 510 mA max.

Terr.TV amplier 15-20 V 40 mA max.

from STB legacy mode 13 V 270 mA max., 18 V 240 mA max.

dSCR mode 13 V 370 mA max.
legacy+dSCR mode 13 V 410 mA max., 18 V 310 mA max.

Current pass from DC input to H trunk lines, switchable 20 V 1.73 A max. 20 V 1.49 A max.
Operating temperature range -20
Dimensions 134x135x30 mm 134x135x30 mm

Weight (packed) 0.42 kg 0.44 kg

84 dBµV

o

Ω

÷ + 50o C

* without external DC feeding

Draugystes str. 22, LT-51256 Kaunas, Lithuania, tel.: +370 37 - 31 34 44, fax: +370 37 - 31 35 55
E-mail: [e-mail], http://www.terraelectronics.com