The HSM12001B from Holzworth Instrumentation is a Signal Generator with Frequency 10 MHz to 12.5 GHz, Resolution 0.001 Hz, Output Power -20 to 20 dBm, Phase Noise -110 dBc/Hz at 12GHz, Rise Fall time 100 ns. Tags: Analog Signal Generator. More details for HSM12001B can be seen below.