a. Agent X and agent Y are two spies who want to transmit a secret message to their headquarters. In order to ensure secrecy, half of this message is to be transmitted in Urdu by agent X while the other half in Pashto by agent Y. Both halves when decoded together at the headquarters can convey the complete information and therefore must be sent in a single transmission. They have an AM transmitter but it has one problem that it can only transmit one carrier frequency. How can they simultaneously transmit both messages using this AM transmitter?
a. Agent X and agent Y are two spies who want to transmit a secret message to their headquarters. In order to ensure secrecy, half of this message is to be transmitted in Urdu by agent X while the other half in Pashto by agent Y. Both halves when decoded together at the headquarters can convey the complete information and therefore must be sent in a single transmission. They have an AM transmitter but it has one problem that it can only transmit one carrier frequency. How can they simultaneously transmit both messages using this AM transmitter?
b. A radio transmitter TX1 is using amplitude modulation with maximum bandwidth of 10 kHz. Due to some technical issue, the amplitude modulator stops working. Technicians found out that it will take at least two days to repair the modulator. They have a frequency modulator and they want to use it to transmit the information using frequency modulation. Is it possible with the given constraints? Why or why not?
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