Keysight (Agilent/HP) 11729B

For measuring phase and amplitude noise on any signal sources in the frequency range 5 MHz to 18 GHz, intended for use with signal generators such as HP 8662 A and spectrum analyzers such as HP 8566, measurement range down to -160 dBc/1 MHz or -138 dBc/1 kHz, all functions also controllable via built-in IEEE-488 interface. CARRIER-NOISE TEST SET 5 MHz - 18 GHz