Question
If an originate mode modem transmits a mark at $f_1$ and a space at $f_2$ and receives a mark at $f_3$ and a space at $f_4$, what would be the corresponding frequencies of an answer mode modem to ensure communications compatibility?
Step 1
In a modem communication system, one modem operates in originate mode and the other in answer mode. For them to communicate properly, the transmit frequencies of one must match the receive frequencies of the other. Show more…
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