Rohde & Schwarz M3SR Series 4100, Service Manual, Page: 33 / 138

R&S M3SR Series 4100 HF Transceivers
Contents
1 6124.9007.82.01
1 Description........................................................................................................1.1
1.1 Introduction.....................................................................................................................1.1
1.2 Construction ...................................................................................................................1.2
1.3 Function..........................................................................................................................1.4
1.3.1 Function of the R&S M3SR Series 4100 150 W HF Transceiver ...................................1.4
1.3.2 Function of the Modules .................................................................................................1.6
1.3.2.1 Digital Selector - Function ..............................................................................................1.7
1.3.2.2 Synthesizer - Function..................................................................................................1.10
1.3.2.3 Frontend - Function ......................................................................................................1.13
1.3.2.4 Radio Controller - Function ..........................................................................................1.15
1.3.2.5 Power Amplifier - Function ...........................................................................................1.18
1.3.2.6 Comfort Control Unit (Option) - Function......................................................................1.21
1.3.2.7 Interface Module - Function..........................................................................................1.23
1.3.2.8 Front Panel - Function..................................................................................................1.24
1.3.2.9 Motherboard - Function ................................................................................................1.27
1.3.2.10 Antenna Interface - Function ........................................................................................1.31
1.3.2.11 NMEA Interface (Option) - Function .............................................................................1.32
2 Working Modes and Functions .......................................................................2.1
2.1 General...........................................................................................................................2.1
2.2 Voice Communication ....................................................................................................2.1
2.3 Data Communication......................................................................................................2.3
2.4 Radio Built-in Test ..........................................................................................................2.3
2.5 Radio Control .................................................................................................................2.4
2.6 Cable Connections .........................................................................................................2.5
2.6.1 Rear Cabling ..................................................................................................................2.5
2.6.2 Front Cabling..................................................................................................................2.6
3 Test of Equipment Functions ..........................................................................3.1
3.1 Test Equipment and Tools .............................................................................................3.1
3.2 Function Test with Built-in Tests ....................................................................................3.3
3.3 Test of Specification .......................................................................................................3.5
4 Troubleshooting ...............................................................................................4.1
4.1 Visual Inspection ............................................................................................................4.1
4.2 Troubleshooting..............................................................................................................4.1
4.2.1 Troubleshooting with Built-in Tests Results ...................................................................4.1
4.2.2 Troubleshooting after Testing the Specification .............................................................4.6
4.2.3 Meaning of LED Indications on the Synthesizer.............................................................4.8
5 Replacement of Modules .................................................................................5.1
5.1 Disassembly ...................................................................................................................5.1
5.1.1 General...........................................................................................................................5.1
5.1.2 Disassembling the R&S M3SR Series 4100 150 W HF Transceiver .............................5.2
5.2 Assembly........................................................................................................................5.6
5.3 Digital Selector - Removal and Installation.....................................................................5.7
5.3.1 Removal of FK 41x0 Digital Selector..............................................................................5.7
5.3.2 Installation of FK 41x0 Digital Selector...........................................................................5.8
5.4 Synthesizer - Removal and Installation ..........................................................................5.9
5.4.1 Removal of Synthesizer (A2)..........................................................................................5.9