Chapter 8, Problem 20VE

An analog signal carries 4 bits in each signal unit. if 1000 signal units are sent per second, then baud rate and bit rate of the signal are____ and___.

A signal is sampled using PAM with a bandwidth of 3 kHz. If the lowest frequency is 1000 Hz, the sampling rate is ___________samples/second.

99. If the bit rate for an ASK signal is 1200 bps, the baud rate is ________. a. 300 b. 400 c. 600 d. 1200

Computer Science Suppose that you had more than 4GByte of data to send and could only afford one memory stick but you had plenty of pigeons available (Winston’s extended family). You reason that you can send the data stick back, load it with the next 4GByte of data. What would the throughput of this channel be now?

Why does asynchronous transmission have a non-constant delay between bytes?

Q1) A low pass signal is sampled using PAM with a bandwidth of 3 kHz., the sampling rate is ___________samples/second. Q2) A complex low-pass signal has a bandwidth of 500 kHz. What is the minimum sampling rate for this signal?

In _______ transmission, a start bit and a stop bit frame a character byte.

With higher bit transmission speed, the duration of each bit in the signal, referred to as the _____, reduces. a. bit time b. overhead c. block time d. modulation time

6. Serial communication MOV TMOD, #20H MOV TH1, #-6 MOV SCON, # 50H SETB TRI Again: MOV SBUF, #"V" Here: JNB TI, Here CLR TI MOV SBUF, #"I" Herel: JNB TI, Herel CLR TI MOV SBUF, #"T" Here2: JNB TI, Here2 CLR TI MOV SBUF, #"B" Here3: JNB TI, Here3 CLR TI MOV SBUF, #"H" Here4: JNB TI, Here4. CLR TI MOV SBUF, #"O" Here5: JNB TI, Here5 CLR TI SJMP Again END Result: VITBHO