Question

The slope and level detector circuit in a CRO has a delay of 100 ns. The start-stop sweep generator has a response time of 50 ns. In order to display correctly, a delay line of
1. 150 ns has to be inserted into the y-channel
2. 150 ns has to be inserted into the x-channel
3. 150 ns has to be inserted into both x and y channel
4. 100 ns has to be inserted into both x and y channel

Answer 1

Correct Answer - Option 1 : 150 ns has to be inserted into the y-channel

The slope level detector circuit’s delay = 100 ns

The start-stop sweep generator response time = 50 ns

Total delay = 100 ns + 50 ns = 150 ns.

Sweep generator is applied across horizontal plate and unknown input is applied across vertical plate.

Hence to display correctly, a delay line of 150 ns has to be inserted into vertical plate (or) y-channel