Rohde & Schwarz FSH-Z22 Highlights
The FSH-3 is a small portable fully-featured professional spectrum analyzer, developed by Rohde & Schwarz in Germany  around 2005. It can be used for fault finding, field maintenance, e.g. on mobile radio stations, and monitoring of the radio spectrum. Furthermore, the FSH-3 can be used for location of (intermittent) interferences and even for locating hidden transmitters (bugs).
The FSH-3 covers a frequency range from 100 kHz to 3 GHz and has a resolution bandwith of 100 Hz to 1 MHz. It can be powered by an external mains adapter or by the built-in rechargable batteries. With the built-in tracking generator, the FSH-3 can be used to measure the properties of filter networks and amplifiers.
All controls are at the front panel, directly below the full-colour display. The connectors for RF in, RF out (tracking generator) and optional Power Sensor are all at the rear, just above the grip. At the left, hidden in the grip is a 3.5 mm jack socket for connecting a pair of headphones.