# Homework Help: Signal sampled at 5000 samples/s

1. Nov 15, 2008

### qwerty321

ok i will post in here
I have a signal sampled at 5000 samples/s and I need to find the real values of the first 4 samples starting at t=0..
the signal is:

V=10 sin(8500t)
i do not understand the question..what shall i do?

2. Nov 15, 2008

### Redbelly98

Staff Emeritus
Re: signal

If there are 5000 samples in 1 second, how much time elapses in between samples?

3. Nov 15, 2008

### qwerty321

Re: signal

1/5000

4. Nov 15, 2008

### Redbelly98

Staff Emeritus
Re: signal

Okay, yes.

The first sample is at t=0.
Based on your answer of 1/5000, what is t for the next sample after that?

What is the signal at those values of t?

5. Nov 15, 2008

### qwerty321

Re: signal

t is 2(1/5000) at t=1?

6. Nov 15, 2008

### Redbelly98

Staff Emeritus
Re: signal

No.

You get the first sample at t=0.
Then 1/5000 of time goes by, and it's time to get sample #2. What time is it? I.e., t=_____?

7. Nov 15, 2008

### qwerty321

Re: signal

t=1?

8. Nov 15, 2008

### Redbelly98

Staff Emeritus
Re: signal

No, t=1 when 1 second has gone by.

9. Nov 15, 2008

### Redbelly98

Staff Emeritus
Re: signal

Oh, I'm going to go offline soon, so you'll be on your own for a while.

10. Nov 15, 2008

### qwerty321

Re: signal

i am lost..could you please resume..at t=0 we have 1/5000?

11. Nov 15, 2008