5.1 Frequency bands

While the fibre optical links where designed by SatService GmbH mainly for the transmission of the satellite L-Band frequency band (950 to 2150MHz) also a broadband version from 50MHz to 2150MHz is available. So this link type can also be used to transmit the traditional 70 or 140MHz IF bands of satellite ground stations and a microwave link. But also other terrestrial applications are feasible like the transmission of GSM signals in the 800 and 1800MHz frequency bands.

The sat-nms LFTRX optical link is a broadband device and transmits transparently the complete RF spectrum from one site to the other. All modulation formats, whether they are analog or digital, can be transmitted transparently. The RF signal is directly modulated on to a high performance laser diode and adds no phase noise or frequency instability to the original signal. The result is a very good signal quality.

Due to the very stable design of the optical transmitter and receiver electronics there is no need for an Automatic Gain Control (AGC) within the circuits. So the link is compared to other vendor's solution really transparent.