Question

Draw the neat labelled diagram showing the controls available on front panel of CRO.

Answer 1

Sure! Here's a neat, labelled diagram of the front panel of a Cathode Ray Oscilloscope (CRO), along with a description of the controls typically found on it.

Diagram of Front Panel of CRO:

`
 ------------------------------------------------------------
|                    CATHODE RAY OSCILLOSCOPE                |
 ------------------------------------------------------------
|  |    |     |    |    |   |  |   |    |  |    |    |  |    |
|  |----|-----|----|----|---|--|---|----|--|----|----|  |----|
|  |     |     |    |   |   |   |   |    |   |    |    |     |
|  |     |     |    |   |   |   |   |    |   |    |    |     |
 ------------------------------------------------------------
|                FRONT PANEL OF THE CRO                     |
 ------------------------------------------------------------
| Controls:                                                  |
|                                                           |
| 1. Vertical Controls                                    |
|   a) Volts/Div - Controls the vertical scale (amplitude)|
|   b) Position - Adjusts the vertical position of the trace |
|   c) Intensity - Controls the brightness of the display |
|   d) Focus - Adjusts the sharpness of the trace        |
|                                                           |
| 2. Horizontal Controls                                  |
|   a) Time/Div - Controls the horizontal scale (time base)|
|   b) Position - Adjusts the horizontal position of the trace|
|                                                           |
| 3. Trigger Controls                                     |
|   a) Trigger Level - Sets the voltage level for triggering|
|   b) Trigger Source - Determines the signal for triggering|
|   c) Mode - Selects trigger mode (e.g., auto, normal)  |
|                                                           |
| 4. Input Controls                                       |
|   a) Channel A/B Input - Input for two signals          |
|   b) Coupling (AC/DC) - Selects signal coupling mode   |
|   c) Bandwidth Limit - Limits high-frequency noise     |
|                                                           |
| 5. Other Controls                                       |
|   a) Main Power Switch - Turns the CRO on/off          |
|   b) Beam Finder - Helps in locating the trace on screen|
 ------------------------------------------------------------
`

Explanation of the Controls:

1. Vertical Controls:
   

   - Volts/Div: This adjusts the vertical sensitivity of the display. It determines how many volts are represented by each division on the screen.
   - Position: This allows you to move the waveform up or down on the screen to center it.
   - Intensity: Adjusts the brightness of the trace, making it easier to see.
   - Focus: Controls the sharpness of the trace.

1. Horizontal Controls:
   

   - Time/Div: This adjusts the time base, or the horizontal scale. It tells you how much time each horizontal division represents.
   - Position: Moves the trace left or right on the screen.

1. Trigger Controls:
   

   - Trigger Level: This control sets the voltage level at which the oscilloscope will trigger, starting the waveform display.
   - Trigger Source: Selects which channel or signal the oscilloscope will use for triggering.
   - Mode: Adjusts the trigger mode (e.g., auto, normal) to control how the waveform is triggered.

1. Input Controls:
   

   - Channel A/B Input: These are the input terminals for two different signals (Channel A and Channel B), depending on whether you're using one or two waveforms.
   - Coupling (AC/DC): Chooses whether the oscilloscope will display both AC and DC components (DC coupling) or only the AC component (AC coupling).
   - Bandwidth Limit: Limits the bandwidth of the oscilloscope to reduce high-frequency noise.

1. Other Controls:
   

   - Main Power Switch: Turns the oscilloscope on or off.
   - Beam Finder: Helps you locate the trace on the screen if it's hard to find.

This layout gives you a solid understanding of the controls available on the front panel of a typical Cathode Ray Oscilloscope.