The 845-M-X from Berkeley Nucleonics Corp is a Frequency Synthesizer with Frequency 10 MHz to 20 GHz, Resolution 0.001 Hz, Reference Frequency 1 to 250 MHz(Input), 10/100 MHz(Output), Output Power 23 dBm, Harmonics -75 to -60 dBc(Sub Harmonic) to -15 dBc(Output Harmonics). Tags: Rack Mount, Tunable Frequency. More details for 845-M-X can be seen below.