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Frequency modulation television analysis: distortion analysis
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wong, W. H. Hodge, W. H. |
| Copyright Year | 1973 |
| Description | Computer simulation is used to calculate the time-domain waveform of standard T-pulse-and-bar test signal distorted in passing through an FM television system. The simulator includes flat or preemphasized systems and requires specification of the RF predetection filter characteristics. The predetection filters are modeled with frequency-symmetric Chebyshev (0.1-db ripple) and Butterworth filters. The computer was used to calculate distorted output signals for sixty-four different specified systems, and the output waveforms are plotted for all sixty-four. Comparison of the plotted graphs indicates that a Chebyshev predetection filter of four poles causes slightly more signal distortion than a corresponding Butterworth filter and the signal distortion increases as the number of poles increases. An increase in the peak deviation also increases signal distortion. Distortion also increases with the addition of preemphasis. |
| File Size | 12389271 |
| Page Count | 258 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740006783 |
| Archival Resource Key | ark:/13960/t6d26pv70 |
| Language | English |
| Publisher Date | 1973-11-26 |
| Access Restriction | Open |
| Subject Keyword | Television Transmission Frequency Modulation Electronic Filters Waveforms Signal Transmission Time Division Multiplexing Computerized Simulation Signal Distortion Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
