D.LSB, USB, and FMA receiving antenna patch panel serveswhich of the following functions?Transmitting antenna patch panels areinterlocked with the transmitter for whichof the following reasons?a 4,000-Hz tone is applied to each of sixchannels in a telegraph transmitter andthat each channel is to be sampled at arate of 2. 5 times during each cycle of the4,000-Hz tone.At what speed, inrevolutions per second, must the rotatingswitch turn to accomplish this samplingrate?A transmit multicoupler provides whichof the following functions?A.Receiver isolationB.Transmitter tuningC.Additional amplificationD.Isolation between transmitters(Ans.)Cryptographic equipment performswhich, if any, of the following functions?A.Encodes and decodes messages(Ans.)B.Reduces mean-time betweenmessagesC.Acts as an additional power amplifierD.None of the aboveIn the radio-frequency-carrier shiftsystem, translation of an RF signal to anaudio signal is done by which of thefollowing equipment?A.A converter(Ans.)B.A comparatorC.A radio receiverD.An antenna filterA comparator compares signal strengthduring which of the following types ofreceiver operation?The process of simultaneous transmissionof several intelligible signals on the samefrequency during the same period of timeis calledA.duplexingB.simplexingC.complexingD.multiplexing(Ans.)What are the two methods ofmultiplexing?In time-division multiplexing, assume thata 4,000-Hz tone is applied to each of sixchannels in a telegraph transmitter andthat each channel is to be sampled at arate of 2. 5 times during each cycle of the4,000-Hz tone.At what speed, inrevolutions per second, must the rotatingswitch turn to accomplish this samplingrate?D.10,000(Ans.)In time-division multiplexing, whatdrawback is encountered if an excessivenumber of frequency channels is used?How many times per cycle is a practicaltime-division multiplex systemoptimumly sampled?
