Which of the following types of signals can be relayed through a linear transponder?

A linear transponder on a satellite acts much like a broadband linear amplifier in space; it takes an entire segment of an uplink band and translates it to a downlink band. Because it is linear, it simply reproduces the exact signal types it receives without demodulating or modifying them. This means virtually any emission mode—including CW, SSB, FM, SSTV, PSK, and packet—can be successfully relayed through it, provided the bandwidth fits within the transponder's passband. Note that while it can physically relay FM, operating FM through a linear transponder is highly discouraged because FM signals have a constant carrier that drains a disproportionate amount of the satellite's power. However, strictly speaking of its technical capability, the transponder will pass all these modes.