Terra SRM940 Manual Download Page 3

3

Installation instructions

Read the safety instruction first.

Fit multiswitch on mounting place and connect it (pay attention to the multiswitch inputs and Wideband or Quattro LNB 

outputs marking, connect the isolated 75 Ω loads to the unused RF output F sockets), power on multiswitch.

Then switch on receiver(s). The multiswitch will begin the process of auto-detecting which type(s) of receiver connected. 

All subscriber outputs are configured to connect legacy STB (supports 13/+18V / 22 kHz tone signals), but it 

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

Disconnect RF cables or STBs from necessary outputs to reset to Legacy / 

Start mode

.

Diagram of DC paths

Figure 2. Diagram of DC paths

H

H

H

H

V

V

V

V

Terr.TV

Terr.TV

2

1

2

1

Pair A

Pair B

H

H

H

H

V

V

V

V

SAT A

SAT C

SAT B

SAT D

SAT A

SAT B

SAT D

H

H

H

H

V

V

V

V

Terr.TV

SAT A

SAT C

SAT B

OFF

ON

                 +12V
      100mA max

DC IN

(H)

 

20V      2A

DC-DC
converter

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 1).

Default settings

1.  SAT IF inputs are configured to use 4 Ku-band wideband LNBs (SAT A/B/C/D, LNB LO=10.40 GHz / 10.41 GHz. See label 

on multiswitch rear side and package).

2.  All outputs are configured to connect legacy STB (su13 V / +18V/22 kHz signals), 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). 

3.  PIN Codes (see Table 1 and see chapter

 “Configuration”

).

4.  Only one UB plan is set depended of delivery region, if you need another plan see chapter 

“Configuration”

 or contact 

TERRA UAB.

Summary of Contents for SRM940

Page 1: ... time keep it in a warm room no less than 2 hours before powering The ventilation should not be impeded by covering the multiswitches with items such as newspapers tablecloths curtains The mains socket of the 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 off Avoid short ...

Page 2: ...nge input mode 7 SAT D V trunk input SAT A VHi trunk input in Quattro LNB IF range input mode 8 SAT D H trunk input SAT A HHi trunk input in Quattro LNB IF range input mode 9 DTT trunk input 10 SAT A V trunk output SAT A VLo trunk output in Quattro LNB IF range input mode 11 SAT A H trunk output SAT A HLo trunk output in Quattro LNB IF range input mode 12 SAT B V trunk output SAT A VHi trunk outpu...

Page 3: ... H H H V V V V Terr TV Terr TV 2 1 2 1 Pair A Pair B H H H H V V V V SAT A SAT C SAT B SAT D SAT A SAT B SAT D H H H H V V V V Terr TV SAT A SAT C SAT B OFF ON 12V 100mA max DC IN H 20V 2A DC DC converter 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 1 Default settings 1 SAT IF inputs are configured to use 4 Ku ban...

Page 4: ...ding to standard EN50607 dSCR 2 Default settings Dynamic mode can be changed to Static mode 3 Default setting Satellites A B C D can be changed to Satellites A B for installation 2 Quattro LNBs SAT A B in the case Quattro LNB IF range input mode PC Windows software can be free downloaded from www terraelectronics com Output configuration must be the same per pair of outputs but can be different in...

Page 5: ...rable output level AGC controlled dSCR mode 80 dBµV configurable output level typical legacy mode 74 dBµV DTT gain 0 dB Decoupling SAT IF inputs SAT IF inputs 30 dB SAT IF inputs Tap outputs 30 dB SAT IF DTT 25 dB General Return loss impedance 10 dB 75 Ω DC pass through H trunk lines 3 2 A max 1 2 A max through one line Current consumption from DC input 20 V 750 mA max from STB 18 V 20 mA max Curr...

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