Rohde & Schwarz M3SR Series 4100, Service Manual, Page: 38 / 138

R&S M3SR Series 4100 HF Transceivers Construction
6124.9007.82.01 1.2
1.2 Construction
The R&S M3SR Series 4100 150 W HF Transceiver is made
up
of a basic unit R&S MR 4100X and can
be extended by various options for special signal characteristics and functions. The transceiver is a unit
of 19" modular design measuring three height units (1 HU = 44.45 mm) and with a depth of 570 mm.
The frame accommodates all modules of the R&S M3SR Series 4100 150 W HF Transceiver (see
Fig. 1.2). The modules are inter-connected via plug-in connections, ribbon cables and HF cables. The
plug-in connections are either of self-locking or screwing type. The plug-in modules are mounted in a
frame with guides and self-locking plug-in connectors.
External interfaces are mounted on the front and rear panel. The front panel also includes the fan hood
whose entire surface is covered with ventilation holes. Cooling air is taken in through the front panel
and flows through the frame to cool the modules, before being exhausted via the rear panel. The
R&S MR 4100X basic unit consists of the following modules:
¾ Front Panel
¾ Motherboard
¾ Power Amplifier
¾ Frontend
¾ Synthesizer
¾ Radio Controller
¾ Interface Module
¾ Antenna Interface
Additional internal hardware options:
¾ R&S FK 4120 20 dB Digital Selector
¾ R&S FK 4140 40 dB Digital Selector
¾ R&S GB 4000C Comfort Control Unit
¾ R&S GS 4102 NMEA Interface
Software options:
¾ R&S GS 4102S ALE Software
¾ R&S GS 4103S SECOM-H Software
¾ R&S GS 4112S Data Link Software
¾ R&S GM 4102S HF Modem Software