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NAVEDTRA 14181A
WAVE GENERATION AND WAVE SHAPING 2017 ET2 BIBS
| Question | Answer |
|---|---|
| Which type of waveform undergoes a pattern of changes that returns to its original pattern and repeats the same pattern of changes called? | periodic |
| Periodic waveforms are nonsinusodial except for what? | sine wave |
| What is each completed pattern of a periodic waveform called? | cycle |
| What is the time called for one complete cycle? | pulse |
| What is the number of times in one second that the cycle repeats itself called? | pulse repetition frequency (PRF) |
| Rise time is defined as the time required for the voltage to build up from 10% to what percent of the maximum amplitude point? | 90% |
| What is the time required for the voltage to drop from 90% to 10% of the maximum amplitude point? | fall time |
| What is used to furnish deflection current in the electromagnetic cathode ray tube and is found in television and radar display systems? | trapezoidal wave |
| What is a very narrow pulse called? | trigger |
| What are nonsinusoidal oscillators generally called? | relaxation oscillators |
| Which type of circuit is most often used to generate square or rectangular waves? | multivibrator |
| Astable, monostable, along with what else are the three types of multivibrators? | bistable |
| Which type of multivibrator alternates between two different output voltage levels during the time it is on? | astable |
| Which type of multivibrator is used in computer logic systems and communication navigation equipment? | monostable |
| What are used in switching-circuit applications (computer logic operations) as counters, shift registers, clock pulse generators, and in memory circuits? | flip-flops |
| What is a special type of wave generator used to produce a narrow pulse, or trigger? | blocking oscillator |
| What gives the most rapid transient response without overshoot? | critical damping |
| What is caused by very low resistance and gives a slow transient response? | overdamping |
| What gives rapid transient response with overshoot caused by high or infinite resistance? | underdamping |
| Which type of waveform do all radar sets, oscilloscopes, and computer circuits use? | sawtooth |
| Which type of device limits some part of a waveform from exceeding a specified value? | limiter |
| Limiting circuits are used primarily for wave shaping and what other applications? | circuit protection |
| Which circuit uses the same diode theory and voltage divider action as series limiters? | parallel-limiter |
| What clamps or restrains either the upper or lower extremity of a waveform to a fixed DC potential? | clamping circuit |
| Which type of circuits are widely used for coupling signals from one stage to another? | series RC |
| Timing circuits and circuits which require a particular shape or "spike" of voltage, may use what type of circuits? | shaping |
| What is a waveform other than a sine wave called? | complex wave |
| What is the sine wave which has the lowest frequency in the complex periodic wave referred to as? | fundamental frequency |
| Which term as applied to square waves, means that the waveform must be perfectly square? | pure |
| What is used as a waveshaping network in communications, radar, and computers? | RC integrator |
| Which type of circuit is used in timing or counting circuits in which the number of input pulses are represented by the output voltage? | positive-diode counter |
| Most step counters operate on a ratio of what or less? | 5 to 1 |
Created by:
nng7294
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