The Rohde & Schwarz SFZ is a TV - Sat - Signal Generator, covering the frequency range of 70 to 2050 MHz. Features The SFZ handles IF carrier signals from 70 to 2050 MHz, PAL and SECAM Three standard IF channels, continuously turnable Each IF carrier can be modulated with up to four sound subcarriers, any combination of sound subcarriers with IF carriers possible IF carrier sweep for frequency response measurements on cable networks Additional IF input allows cascading of several SFZs to produce a multi-channel system.