Optical digital filtering, splitting and combining
The theory about digital filters has been introduced. The digital filter designed is needed as a first step to the optical design of the desired filter, to be able to get the coefficients that will be mapped into the optical filter parameters. and Electrically connecting two uninsulated copper wires together is as simple as bringing them into contact at any one point along their length. This allows electrical signals traveling along the wire. read more...
To perform the Experiment please follow the procedure:
1. Install the run time engine program to operate each VI.
2. Activate
the
functions generator
and
scope by pressing
the
from
the tool bar, and then press the
in
each.
3. Adjust the function generator using its soft controls for an output with the following specifications.
|
Wave Form Shape |
Sinusoidal |
|
Frequency |
1 KHz |
|
Amplitude |
4 Vp-p |
|
DC offset |
0 V |
4. Point the free end of the two optical patch leads close to the desk, wall, etc. ( Note: you should see red light pulsing about once per second from the output of both port C and D. This is the split light energy from port A.
5. Increase the message frequency.
6. Adjust the scope as follows, and activate Ch 1 to get the original message and the copy of it.
|
Channel 0 |
Channel 1 |
|
|
Volts/Div |
1 V |
1 V |
|
DC offset |
0 V |
0 V |
|
Time/Div |
200 µ sec | 200 µ sec |
7. Measure the amplitude of the receiver module's output. Record your measurement in the table below
|
Copy of message via port C |
Copy of message via port D |
|
|
|
8. Observe the message and its copy on the scope, and take a screen shoot of them " Port C and Port D ".
9. Why is the copy of the massage via port C smaller than port D?
10. What's the simplest change that can be made to the set-up to swap the relative size of the port C and D output?