User's Manual

Powerwave Fiber Optics

VM100 56/EN – User’s Manual Rev. P1A9-Draft 2004-11 4 - 7

10. Amplifier

The RF modulated signal is finally amplified in the last FON stage, a 16dB amplifier

with a noise figure of 4dB.

The output signal minimum noise (above the thermal noise) is 22dB.

The output power is set with the previous adjustable attenuator to match the repeater

amplifier input level (maximum 13dBm).

To achieve maximum output power from the repeater, the input signal level to the

repeater has to be correct with respect to the gain. The signal level is adjusted with the

FON adjustable attenuator.

11. Repeater amplifier

The repeater amplifier consists of a low noise amplifier, LNA, a repeater amplifer stage,

and a power amplifier. These stages are described in the VD203 66/EN, AR Repeaters,

User’s Manual.

12. DPX duplex filter

Separates the downlink and uplink signal frequencies between the repeater service

antenna and the separate downlink/uplink FOR amplifiers. The DPX filter is described

in the VD203 66/EN, AR Repeaters, User’s Manual.

16dB