Rohde & Schwarz FSP7 - RF to if Conversion for Frequencies > 3 Ghz - Microwave Converter; Fig. 3-3 RF-To-IF Conversion for Frequencies > 3 Ghz

Instrument Design and Function Description R&S FSP
1164.4556.82 3.4 E-1
RF to IF Conversion for Frequencies > 3 GHz - Microwave Converter
The high frequency models of the R&S FSP (frequency range > 3 GHz) also comprise a microwave
converter board. This module converts the analyzer input signals in the range above 3 GHz to the
second IF of 404.4 MHz. After the attenuator, the input signals are split within the diplexer into the two
signal paths < 3 GHz and > 3 GHz. Signals above 3 GHz are forwarded to the mixer via the YIG filter.
3404.4 to 6595.6 MHz
1.LO, P > -5 dBm
YIG filter
RF input
0 to 7 GHz
0 to 3 GHz
to frontend
IF output
404.4 MHz
Fig. 3-3 RF-to-IF conversion for frequencies > 3 GHz
The first LO converts the input frequency to the 404.4 MHz IF (by mixing fundamental and harmonics).
For this purpose, the LO signal (3.4 to 6.6 GHz) generated in the RF frontend is amplified to the required
LO level.
The basic model is equipped with the necessary interfaces (IF input 404.4 MHz, LO output 3.4 to 6.6
GHz) for extending the frequency range by simply adding a microwave converter.