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Frequency. FSK means Frequency Shift Keying.
FSK MODEMs use 4 frequencies at the low end of the audio range:
- 1070 Hz (Space - originating MODEM)
- 1270 Hz (Mark - originating MODEM)
- 2025 Hz (Space - answering MODEM)
- 2225 Hz (Mark - answering MODEM)
These frequencies were selected by AT&T to all fit in the 3000 Hz bandwidth of a standard long distance voice telephone line and allow both sides to be sending data at the same time without interfering with each other.
What else can I help you with?
Is NOT a source of Variation?
A source of variation refers to factors that contribute to differences in data or outcomes. Examples of sources of variation include measurement errors, environmental changes, and individual differences. However, a static constant, such as a fixed parameter in an experiment that does not change, is NOT a source of variation, as it does not introduce any differences in the results.
How can one determine the standard value for a given parameter?
To determine the standard value for a given parameter, one can use statistical methods such as calculating the mean, median, or mode of a set of data points related to that parameter. These values represent typical or average values for the parameter and can help establish a standard reference point.
What is the significance of the hat notation in the context of mathematical statistics?
The hat notation in mathematical statistics is used to represent an estimate of a parameter based on sample data. It signifies that the value is an estimate rather than the true parameter value.
What were Private line modems?
Private line modems worked exclusively with voice and data private lines
What happens when modems handshake?
When modems handshake they are "talking" to each other while in the process of sending and receiving data.
What three aspects of the electrical signals carried over the telephone network can be varied by modems to encode data in the signal?
Modems can vary the amplitude, frequency, and phase of the electrical signals transmitted over the telephone network to encode data. Amplitude modulation changes the strength of the signal to represent different data values, frequency modulation alters the signal's frequency for encoding, and phase modulation shifts the phase of the signal to convey information. By manipulating these aspects, modems effectively translate digital data into a format suitable for transmission over analog telephone lines.
How fast can dial-up modems transfer data?
The fastest dial-up modems have a maximum transfer rate of 56 kbps.
What bandwidth do traditional modems use to transmit data?
2400 Hz
How can you describe variation in a set of data?
measures of variation
What does symbolic data means-?
Symbolic data differ from standard data in that they contain internal variation.
What is a variation in data?
it means the data is different; the data varies.
What is the different betwen parameter and estimate?
A parameter is a fixed value that characterizes a population or a model, such as the mean or standard deviation in statistics. In contrast, an estimate is a calculated approximation of a parameter based on sample data. While parameters are often unknown and represent the true characteristics of a population, estimates provide a practical way to infer those parameters using observed data. Thus, estimates can vary depending on the sample selected, whereas parameters remain constant for a given population.
