Spaun SBK 5503 NFI 842488 User Manual
Product codes
842488
7
info@spaun.de
Which cable lengths can be used?
This question cannot be generally answered. However, there are factors that must be considered in principle and based
on these factors it is also possible to determine whether a desired cable length can be realized or not.
on these factors it is also possible to determine whether a desired cable length can be realized or not.
For the calculation the following specifications are needed: The attenuation of the used coaxial cable at 2000 MHz. A
typical value for a standard 7mm coaxial cable is approx. 30dB/100m. SPAUN´s SPOAX cable is a high quality cable
and has an excellent attenuation of 27.8 dB/100m at a frequency of 2150 MHz. Furthermore, the signal level from the
LNB is required (typically 78 dBµV). Finally, the technical specifications of the used multiswitch are needed to do the
calculation.
typical value for a standard 7mm coaxial cable is approx. 30dB/100m. SPAUN´s SPOAX cable is a high quality cable
and has an excellent attenuation of 27.8 dB/100m at a frequency of 2150 MHz. Furthermore, the signal level from the
LNB is required (typically 78 dBµV). Finally, the technical specifications of the used multiswitch are needed to do the
calculation.
Example:
The LNB provides a signal level of 78 dBµV. The distance from the LNB to the multiswitch (SMS 51603 NF) is 30 m.
This cable length indicate an attenuation of approx. 9 dB. Therefore the input level of the SMS 51603 NF should be
approx. 69 dBµV. The SMS 51603 NF has a gain of 9 dB so we can reach an output level of 78 dBµV.
The signal level at the sockets should be at least 55 dBµV. This means that we have a signal budget of 78 dBµV - 55
dBµV = 23 dBµV. A budget of 23 dBµV is equivalent to a cable length of 70m and additionally the used TV socket outlet
(ASE 5 F).
The LNB provides a signal level of 78 dBµV. The distance from the LNB to the multiswitch (SMS 51603 NF) is 30 m.
This cable length indicate an attenuation of approx. 9 dB. Therefore the input level of the SMS 51603 NF should be
approx. 69 dBµV. The SMS 51603 NF has a gain of 9 dB so we can reach an output level of 78 dBµV.
The signal level at the sockets should be at least 55 dBµV. This means that we have a signal budget of 78 dBµV - 55
dBµV = 23 dBµV. A budget of 23 dBµV is equivalent to a cable length of 70m and additionally the used TV socket outlet
(ASE 5 F).
What are the differences in terrestrial transmission between the different SPAUN multiswitches?
SPAUN offers three different solutions for the terrestrial transmission:
First version:
The terrestrial path has an active forward path in the frequency range of 85 ... 862 MHz and a passive return path in the
range of 5 ... 65 MHz. It is possible to use triple-play applications (Premium Class SMS 5xx03 NF series)
The terrestrial path has an active forward path in the frequency range of 85 ... 862 MHz and a passive return path in the
range of 5 ... 65 MHz. It is possible to use triple-play applications (Premium Class SMS 5xx03 NF series)
Second version:
The terrestrial path is completely passive in the frequency range from 5 … 862 MHz.
It is also possible to use triple-play applications but without amplification in forward path
(Light Class SMS 5xx07 NF series)
The terrestrial path is completely passive in the frequency range from 5 … 862 MHz.
It is also possible to use triple-play applications but without amplification in forward path
(Light Class SMS 5xx07 NF series)
Third version:
The terrestrial path is completely active terrestrial stage and has a fixed frequency range from 47 ... 862 MHz.
It is not possible to use triple-play applications (Standard Class SMS 5xx08 NF series)
The terrestrial path is completely active terrestrial stage and has a fixed frequency range from 47 ... 862 MHz.
It is not possible to use triple-play applications (Standard Class SMS 5xx08 NF series)
What‘s the functionality of the LNB supply voltage mode switch?
Several SPAUN products have a switch which allows to adjust the supply voltage of the connected LNBs.
Several SPAUN products have a switch which allows to adjust the supply voltage of the connected LNBs.
There are three possible modes:
12 V: All 4 SAT-IF inputs supply a voltage of 12 volts. This setting is necessary to run a Quattro LNB.
18 V: The vertical SAT IF inputs supply 14 volts and the horizontal SAT IF inputs supply 18 volts.
22 kHz: The vertical SAT IF inputs supply 14 volts and the horizontal SAT IF inputs supply 18 volts. Additionally the two
High-Band inputs are modulated with a 22 kHz tone. With this setting the use of a QUAD LNB (included multiswitch) is
possible.
18 V: The vertical SAT IF inputs supply 14 volts and the horizontal SAT IF inputs supply 18 volts.
22 kHz: The vertical SAT IF inputs supply 14 volts and the horizontal SAT IF inputs supply 18 volts. Additionally the two
High-Band inputs are modulated with a 22 kHz tone. With this setting the use of a QUAD LNB (included multiswitch) is
possible.