The SLSM5-48 from Luff Research, an Ironwave Technologies Company is a Frequency Synthesizer with Frequency 2 to 4 GHz, Step Size 1 kHz, Reference Frequency 10 MHz, Output Power 13 to 15 dBm, Harmonics -17 dBc. Tags: Module with Connectors, PLL Frequency Synthesizer. More details for SLSM5-48 can be seen below.