Amplifier; Combiner - R&S N 8000 Series System Manual

The splitter distributes the output signal of the exciter to the individual amplifiers. In addition,
an integrated attenuator that is dependent on the number of outputs ensures that the RF
signal is output at the right power level.
The splitter is a broadband unit that operates in the frequency range 470 MHz to 862 MHz.
1.5.2

Amplifier

Fig. 22 R&S VH8300A1 amplifier
The R&S VH8300A1 air-cooled amplifier operates in the broadband range from 470 MHz
to 862 MHz (UHF bands IV/V) and is suitable for both analog and digital signals without
needing to be adjusted. The output power of an amplifier is, depending on the requirements
with regard to the MER, between 450 W und 500 W.
The amplifiers amplify the exciter signals distributed by the splitter and forward them to the
combiner. The amplifiers in a transmitter rack are controlled via the rack controller. Mea-
sured values and status information are recorded by the rack controller via CAN bus and
forwarded to the R&S NetCCU800 transmitter control unit. The number of amplifiers in the
transmitter depends on the transmit power.
Note For detailed information about the amplifier, refer to the amplifier manual.
Transmitters with one amplifier in rack
In transmitters with only one amplifier in the rack, the splitter and combiner are omitted. The
signals of the exciter are fed directly to the amplifier and, following amplification, routed fur-
ther downstream in the signal path to the harmonics filter.
1.5.3

Combiner

Note This section is not relevant for transmitters having only one amplifier in the rack.
2098.0188.72
Chapter 2
- 2.18 -
Design and Characteristics
E-1