Terrestrial
•
The terrestrial input has an adjustable attenuator (SMS types 0 ... -15 dB).
The terrestrial amplifier is CATV-compatible (push-pull technique).
• Turning the adjustable attenuator fully CCW, the terrestrial amplifier is switched
off and bypassed (SMS 9982 NFI). Terrestrial distribution then is completely passive
and return path compatible.
• Aerial signals must be fed via diplexers or multiband-amplifiers (selective multi-
bandamplifiers type MBV... / MVF... or selective FM devices as FM filter FMP 30
or FM amplifier VFM.. F). It is not recommended to connect an aerial directly.
SAT IF distribution
• The IF amplifier units are equipped with a level adjuster for every IF input
to equalise different signal levels from the satellite systems. A level decrease up to
10 dB is possible.
• The max. input level is 90 dBµV for SMS 9982 NFI (max. channel occupation,
level
adjusters fully CCW
).
• The IF signals must be connected as shown on the case of the multiswitch to ensure
correct access to the signals.
Max. output level
Multicarrier load:
•
For multicarrier load the maximum output level must be derated in assistance with the
following table.
Number of
carriers
2
4
6
8
10
12
16
24
36
Number of
amplifiers
1
2
3
4
5
6
8
12
18
Level reduction
( dB )
0
3
5
6
7
8
9
11
12
Trunklines (SMS 9982 NFI)
Maximum output level
Terr. 47...862 MHz
60 dB IMA3 / EN 60728-3
105 dBµV
Maximum output level
SAT 950 ... 2200 MHz
35 dB IMA3 / EN 60728-3
109 dBµV
Содержание SMK 99122 F
Страница 11: ...SMS 9982 NFI...
Страница 12: ...SMK 9969 F SMK 9989 F SMK 99169 F SMK 99129 F...
