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4. OPERATING INSTRUCTIONS

4.1 Dimensioning a Fibre Optic system

The  optic  system  attenuation  of  the  system  must  range  between  15  and  21dB.  Refer  to  the  technical  features  of  passive 

components included in the distribution to calculate the optic system attenuation.

The  OPT-RX  SCD2guarantees  a  suitable  level  of  the  TV  and  SAT  signal  at  the  DCSS  output  if  the  optic  system  attenuation 

between the transmitter and the receiver is 15 ÷ 21 dB and the RF signal in the OPT-TX DT input follows the indications given in 

the transmitter manual

ATTENTION: 

• 

Don’t connect the OPT-TX DT and the OPT-RX SCD2 directly, unless proper line optic attenuators are used. 

• 

it is essential to use an optic meter to check the optic level in the receiver and avoid to damage the receiving photodiode (it 

might be damaged if the input signal is higher than -8dBm).

4.2 Output levels to the optical receiver 

SAT

The SAT power in the DCSS outputs of the OPT-RX SCD2 optic receiver is 82dbuV if both the optic input level and the correct 

dimensioning of the optic system attenuation are met.

TV

The output TV level from the OPT-RX SCD2UK fibre optic receivers depends on the number of the channels transmitted by the 

transmitter and the optic attenuation of the stand. Please remember that 1dB of optic loss corresponds to 2dB of attenuation at 

electric level (RF).

The following are a few reference levels of the TV (DVB-T/CATV) signals at the receiver output:

RF output level per MUX

No. of Muxes

Receiver optical Input -8dBm

Receiver optical Input -14dBm

40

87dBµV

75dBµV

16

91dBµV

79dBµV

8

94dBµV

82dBµV

4

97dBµV

85dBµV

Table 2: Indication of the output levels in OPT-RX SCD2 - TV signal

NOTE: 1dB optic signal corresponds to 2dB at electric level (RF).

FM, DAB and DVB-T

The FM and DAB signal levels must be 10dB lower than DVB-T.

OPT-RX 4 MINI

Shown below are some of the reference levels of the signals output to the receiver OPT-RX 4 MINI:

TV (DVB-T/CATV)

The overall output power is -27dBm (82dBµV) with 21dB of optical attenuation which means that the fewer multiplexes that are 

transmitted, the better the output level and quality.

The FM and DAB signal levels must be 10dB lower than DVB-T.

5. TYPICAL INSTALLATION EXAMPLES

Some example diagrams are available at the end of the manual and on the website www.fracarro.com

Содержание OPT-RX SCD2

Страница 1: ...HOME FIBRE OPT RX SCD2 OPT RX SCD2 UK OPT RX SCD2 ZA ISTRUZIONI PER L USO OPERATING INSTRUCTIONS...

Страница 2: ...tilizzare tasselli ad espansione adeguati alle caratteristiche del supporto di fissaggio La parete ed il sistema di fissaggio devono essere in grado di sostenere almeno 4 volte il peso dell apparecchi...

Страница 3: ...IN OPTIONAL ingresso F d alimentazione supplementare per un alimentatore esterno 12 18V LED alimentazione acceso verde normale funzionamento correttamente alimentato lampeggiante verde al avvio e al r...

Страница 4: ...NZIONE Non sono ammessi collegamenti diretti tra OPT TX DT e OPT RX SCD2 a meno dell utilizzo di opportuni attenuatori ottici di linea E indispensabile utilizzare un misuratore di segnale ottico per v...

Страница 5: ...B 10 quando il MER in ingresso maggiore di 15dB Banda uscita per Utenze SCR MHz 1210 1420 1680 e 2040 Banda uscita per Utenze DCSS MHz 985 1050 1115 1275 1340 1485 1550 1615 1745 1810 1875 e 1940 Band...

Страница 6: ...75 MHz UB18 1130 MHz UB9 1340 MHz UB19 1530 MHz UB10 1485 MHz UB20 1580 MHz UB11 1550 MHz UB21 1630 MHz UB12 1615 MHz UB22 1730 MHz UB13 1745 MHz UB23 1780 MHz UB14 1810 MHz UB24 1830 MHz UB15 1875 MH...

Страница 7: ...ansion bolts suitable to the fixing support The wall and the fixing support must be able to bear at least 4 times the equipment weight Attention to avoid being hurt the unit must be mounted to the wal...

Страница 8: ...RODUCT INSTALLATION 3 1 Installation The OPT RX SCD2 receivers are installed to the wall using the brackets incorporated in the product mechanics Allow sufficient space for correct ventilation See the...

Страница 9: ...stem attenuation are met TV The output TV level from the OPT RX SCD2UK fibre optic receivers depends on the number of the channels transmitted by the transmitter and the optic attenuation of the stand...

Страница 10: ...is higher than 15dB Output band for SCR users MHz 1210 1420 1680 2040 Output band for DCSS users MHz 985 1050 1115 1275 1340 1485 1550 1615 1745 1810 1875 1940 Output band for DCSS users UK OPT RX SCD...

Страница 11: ...1275 MHz UB18 1130 MHz UB9 1340 MHz UB19 1530 MHz UB10 1485 MHz UB20 1580 MHz UB11 1550 MHz UB21 1630 MHz UB12 1615 MHz UB22 1730 MHz UB13 1745 MHz UB23 1780 MHz UB14 1810 MHz UB24 1830 MHz UB15 1875...

Страница 12: ...lati sulla base dei valori medi di specifica dei componenti passivi utilizzati Warning The choice of antennas dishes and multiband amplifiers are shown purely as an indication of a typical example Car...

Страница 13: ...porta 1 1210 MHz Freq porta 2 1420 MHz Freq porta 3 1680 MHz Freq porta 4 2040MHz Freq porta 5 985 MHz Freq porta 6 1050 MHz Freq porta 7 1115 MHz Freq porta 8 1275 MHz Freq porta 9 1340 MHz Freq por...

Страница 14: ...X QT LTE SIGMA 6HD BLV 6F FIL 10 OPT TX DT OPT TX DT PENTA 85 OPT RX SCD2 PA4 PA4 SPS1750 OPT RX SCD2 PA4 PA4 SPS1750 OPT RX SCD2 PA4 PA4 SPS1750 OPT RX SCD2 PA4 PA4 SPS1750 OPT RX SCD2 PA4 PA4 SPS175...

Страница 15: ...5 Schema Radiale 1TX 16div opzione Star distribution system 1 TX split into 16 Azienda Fracarro Radioindustrie SRL File schema impianto SCD2 frx Schema Soluzione TV SAT con Multiswitch SCD2 5416 ver 1...

Страница 16: ...o sull apparecchiatura indica che il prodotto alla fine della propria vita utile deve essere raccolto separatamente dagli altri rifiuti L utente dovr pertanto conferire l apparecchiatura giunta a fine...

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