Multiburst signal generation
AssigneeTektronix, Inc.
InventorsDavid J. Jurgensen, Howard A. Landsman
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Abstract
A multiburst test signal generator and a method for using the generator's test signal to determine the frequency response characteristics of television video circuits with a high degree of accuracy is described. One of the burst frequencies is continuously enabled and made variable and the other burst frequencies are disabled. The resulting continuous sine wave is applied to the circuit being tested, its frequency is varied, and the output of the circuit being tested is monitored with a conventional frequency counter.
Claims9
A signal generator adapted for testing video circuitry, comprising
- means for generating sine wave signals at a frequency dependent on a current level supplied thereto,
- means for supplying current to said generating means, said means being operable in a first mode to supply a plurality of different, discrete current levels in a repeating sequence, and in a second mode to supply a continuous, adjustable level current, and
- means for switching said current supplying means between said first and second modes.
A multimode signal generator for testing television circuitry, said generator comprising a sine wave signal source operable in a first mode to produce, at a television line rate, a repetitive test signal that includes a plurality of sine wave bursts at different frequencies, and operable in a second mode to produce a continuous, variable frequency sine wave signal, said signal source including:
- means for generating sine wave signals at a frequency dependent on a current level supplied to said generating means, and
- means for supplying current to said generating means at a plurality of different current levels in a repeating sequence during operation in said first mode, and for supplying a continuous, adjustable current level to said generating means during operation in said second mode.
Dependencies are inferred from the claim text.