Digital vs analog oscilloscope

1. What is the primary function of an oscilloscope?

• A. To generate high-voltage power for electronic devices
• B. To graph voltage intensity against a temporal axis
• C. To store binary data for long-term computer memory
• D. To convert digital signals into physical sound waves

2. How does an analog oscilloscope create a waveform image?

• A. It uses a CPU to reconstruct discrete numerical samples
• B. It employs a laser to etch data onto a glass surface
• C. It uses a beam of electrons to strike a phosphor-coated screen
• D. It streams signal data directly to a high-definition monitor

3. What is a defining component of a Digital Storage Oscilloscope (DSO)?

• A. An electron gun
• B. Deflection plates
• C. An analog-to-digital converter (ADC)
• D. A phosphorus screen

4. Why are analog oscilloscopes described as having 'real-time transparency'?

• A. They have infinite memory capacity
• B. They display signals as they happen without sampling gaps
• C. They can connect to the internet in real-time
• D. They remove all background electrical noise automatically

5. Which of these is a significant advantage of digital oscilloscopes?

• A. They have zero dead time between captures
• B. They provide instantaneous, lag-free mechanical response
• C. They offer post-processing features like automatic measurements
• D. They do not rely on analog components at all

6. What is the 'dead time' in a digital oscilloscope?

• A. The time it takes for the phosphor to stop glowing
• B. The interval where the processor refreshes and cannot sample new data
• C. The time required for an electron beam to travel through a vacuum
• D. The period when the device is officially powered off

7. What happens if a digital scope samples too slowly compared to the signal frequency?

• A. Aliasing
• B. Hyper-resolution
• C. Instantaneous feedback
• D. Hardware acceleration

8. Which part of both analog and digital oscilloscopes must remain analog?

• A. The microprocessor
• B. The storage buffer
• C. The front end/input coupling circuitry
• D. The display monitor

1. Why might an analog scope be preferred for detecting rare, intermittent glitches?

• A. It uses a higher sampling rate than any digital scope
• B. It provides intensity grading via phosphor persistence
• C. It can automatically mask and alarm on specific digital patterns
• D. It converts the signal to a binary data file immediately

2. What is the primary constraint mentioned regarding Digital Storage Oscilloscope accuracy?

• A. They are too fast for human eyes to track
• B. They suffer from quantization errors due to bit-depth limitations
• C. They cannot be used for high-speed communications
• D. They are physically unable to handle DC voltage

3. In a laboratory setting, why would you choose a digital scope over an analog one for documentation?

• A. Digital scopes are immune to electrical interference
• B. Analog scopes require a tripod and constant manual focus
• C. Digital data is binary, shareable, and archival
• D. Digital scopes do not require any probing of the circuit

4. How does the Nyquist-Shannon theorem guide professional engineering practice?

• A. It defines the maximum limit of an electron's speed
• B. It dictates that sampling rates should ideally be 5-10x signal frequency
• C. It limits the size of the phosphor screen on analog scopes
• D. It proves that analog scopes are physically inferior

5. What is the tactile advantage of an analog oscilloscope often cited by experienced technicians?

• A. The ability to reprogram the firmware for better performance
• B. Zero-latency interaction with physical knobs for instantaneous response
• C. Integrated auto-save functionality for long-term logging
• D. Automated Fast Fourier Transform capabilities

6. If you need to perform a Fast Fourier Transform (FFT) on your signal, what is your mandatory equipment choice?

• A. A classic CRT analog scope
• B. A cathode ray tube oscilloscope
• C. A digital storage oscilloscope
• D. Any analog voltmeter

7. What makes an analog oscilloscope 'always on' in terms of signal capture?

• A. They use high-speed processors for constant refreshing
• B. They lack the dead time associated with digital data processing
• C. They require a constant power supply to maintain the vacuum
• D. They do not rely on an ADC, thus having no memory to fill

8. What is the effect of using 'infinite persistence' on a digital oscilloscope?

• A. It forces the ADC to sample faster than the hardware capacity
• B. It simulates the analog behavior of leaving a trace on the screen
• C. It automatically deletes memory files to save storage space
• D. It removes all noise from the incoming analog signal