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2 years ago

How many frequencies does a full-duplex qam-64 modem use?

Computers and Technology

2 answers:

Vsevolod [243]2 years ago

8 0

The answer is 2 frequencies.

A Full-Duplex QAM 64 K Modem uses two frequencies. One frequency is used for upstream and the other for downstream. A variety of common QAM forms are available and include, 16 QAM, 32 QAM, 64 QAM, and 256 QAM. For example, for domestic broadcast use, 64 and 256 QAM are used for cable modem and digital cable TV. The modulation scheme for this modem uses both amplitude and phase.

notka56 [123]2 years ago

6 0

A full-duplex qam-64 modem uses 2 frequencies.

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Bingel [31]

Answer:

yes I agree with you

Explanation:

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2 years ago

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Answer:

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Explanation:

Circuit breaker -

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2 years ago

Which of the following is NOT a benefit of virtual memory? speed up of process creation increases in the effective access time o

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Answer:

speed up of process creation increases in the effective access time of memory

Explanation:

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2 years ago

When an author produce an index for his or her book, the first step in this process is to decide which words should go into the

Igoryamba

Answer:

import string

dic = {}

book=open("book.txt","r")

# Iterate over each line in the book

for line in book.readlines():

tex = line

tex = tex.lower()

tex=tex.translate(str.maketrans('', '', string.punctuation))

new = tex.split()

for word in new:

if len(word) > 2:

if word not in dic.keys():

dic[word] = 1

else:

dic[word] = dic[word] + 1

for word in sorted(dic):

print(word, dic[word], '\n')

book.close()

Explanation:

The code above was written in python 3.

import string 

Firstly, it is important to import all the modules that you will need. The string module was imported to allow us carry out special operations on strings.

dic = {}

book=open("book.txt","r")

# Iterate over each line in the book

for line in book.readlines():

tex = line

tex = tex.lower()

tex=tex.translate(str.maketrans('', '', string.punctuation))

new = tex.split()

An empty dictionary is then created, a dictionary is needed to store both the word and the occurrences, with the word being the key and the occurrences being the value in a word : occurrence format.

Next, the file you want to read from is opened and then the code iterates over each line, punctuation and special characters are removed from the line and it is converted into a list of words that can be iterated over.

 for word in new:

if len(word) > 2:

if word not in dic.keys():

dic[word] = 1

else:

dic[word] = dic[word] + 1

For every word in the new list, if the length of the word is greater than 2 and the word is not already in the dictionary, add the word to the dictionary and give it a value 1.

If the word is already in the dictionary increase the value by 1.

for word in sorted(dic):

print(word, dic[word], '\n')

book.close()

The dictionary is arranged alphabetically and with the keys(words) and printed out. Finally, the file is closed.

check attachment to see code in action.

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2 years ago

Write code which takes a user input of a String and an integer. The code should print each letter of the String the number of ti

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import java.util.*;

public class myClass {

public static void main(String args[]) {

Scanner scan = new Scanner(System.in);

System.out.print("Input a String: ");

String str = scan.nextLine();

System.out.print("Input an integer: ");

int num = scan.nextInt();

for(int i=str.length()-1; i>=0; i--) {

for(int j=0; j<num; j++) {

System.out.print(str.charAt(i));

}

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2 years ago