Motherboard - Function R&S M3SR Series 4100 HF Transceivers
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Fill Gun
The Fill Gun interface is used to transfer crypto keys and configuration data into the radio. This serial
interface and the serial remote interface of the rear panel share the remote interface of the
Radio Controller. As soon as a Fill Gun is connected it is detected by a level detector. Then the
external remote interface is switched off and the Fill Gun interface is switched on.
RCB Serial / Optical IF
The radio controller communicates to the internal / external Power Amplifier (PA) via the serial RCB.
The external serial RCB is realized as an optical interface by using a fiber optic transceiver with wave
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lengths of TX 1310 nm, RX 1530 nm.
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