Rohde & Schwarz 1164.4391.03, Service Manual

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R&S FSP Instrument Design and Function Description
1164.4556.82 3.1 E-1
3 Repair
This chapter describes the design of the R&S FSP, simple measures for repair and troubleshooting and,
in particular, the replacement of modules. For troubleshooting and diagnostics, a selftest is available for
polling diagnostic voltages of the modules and detecting limit violations.
The firmware update and the installation of options are described in chapter 4 of this service manual.
Instrument Design and Function Description
A detailed schematic of the R&S FSP design is presented in the block diagrams below and in the
attachments (see also chapter 5).
The following functional description of the instrument refers to the block diagram.
Block Diagram
See also the drawings in chapter 5 for a detailed block circuit.
Option
OCXO
Frontend
Detector
FMR5
+
Display
Frequency
reference
IF
20,4 MHz
0 to 70 dB
10-dB-steps
RF-
Input
Cal.- Signal
128MHz, -30dBm
IF 20,4 MHz / VIDEO
Converter
RF-ATT
Option
el. ATT+
Preamp
1.LO
IF 404,4 MHz
1.LO
Option B3
AF-Demod.
128 MHz
10 MHz
32 MHz
128 MHz
9 kHz to 3 GHz
Option
Tracking
Generator
TG
Output
9k...3GHz
128 MHz
IF-Filter
Ext.Ref. In 10 MHz
Ext.Ref. Out 10 MHz
10 MHz
IF 20,4 MHz Out
Option B10
2. IEC
Diplexer
YIG-
Filter
Analog IF
(100 kHz..10 MHz)
MW-Converter
Power
Supply
TG I-Input
TG Q-Input
Option B4
OCXO
Option B6
Trigger
ZF
40.4 MHz
Fig. 3-1 Block diagram