4. Discussion

4.1 Analysis of results

From the data that we have collected and the videos that we have recorded, we can tell that the AM transceiver device is able to transmit information successfully through different situations. The video recordings have shown that it is able to transmit information clearly. The 4 videos show that the transceiver device is working as shown, however, we have observed that when we did the altitude test, the transceiver device could not work. However, the rest of the experiments including the 100m test worked out fine where they were able to transmit tones.

4.2 Key findings
Firstly, we found out that the AM transceiver device was working, as there was a tone/sound when we pressed the tactile switch (Futurekit) We pressed it many times to ensure that it was really working and that our finding that it works was accurate.

Secondly, the AM transceiver device was able to transmit information 100m. This is stated in the manual that it is able to transmit between 50m to 150m (Futurekit). Thus, when we tried it out, it worked successfully.

Thirdly, The AM transceiver device was not very successful in transmitting information when at different altitudes, as the transmitted information was unclear. We were initially shocked by this, however, we eventually realised that it was affected by the terrain of the AM transceiver device. This is also true as there is also other evidence that states that terrain can also have a significant effect on signal, where it is one of the factors contributing to signal path loss. (Radio Electronics)

4.3 Explanation of key findings

Firstly, the tone or sound was due to the transmitting sounds when we pressed the tactile switch. According to manual, if we pressed the 12 legs or the tactile switch and if there is a sound or tone, this means that the AM Transceiver device is working.

Secondly, we were able to observe that there was a sound/tone transmitted. This is especially evident in the video where we can hear sound being transmitted. Furthermore, since the terrain where we had tested the transceiver device on is a flat terrain, the sound being transmitted is fair. Rain or shine we have found out, does not have any effect on the signal.

Thirdly, the AM transceiver device to us, was not very successful in transmitting information when at different heights, despite being only 1 level up. However, we felt that this was due to the terrain and altitude which in the end, was not able to transmit sound successfully. Also, the different height in m, made a significant difference to support the reason on why the AM transceiver device was not able to work, both in the rainy or sunny day. Rain or shine we have found out, does not have any effect on the signal.

4.4 Evaluation of engineering goals

  1. Test if it can transmit across 100m
  2. Test if it can transmit on rainy/sunny days
  3. Test if it can be transmitted even when at different levels of altitude eg. 1 at Level 1, another walky talky at level 2

ENGINEERING GOAL
Success
Transmit across 100m
Yes
Transmit on rainy/sunny days
Yes
Transmitted when at different levels of altitude
No

For our AM transceiver device, we tried the basic requirement to know whether the AM transceiver device worked, and it worked.  

However, in terms of our engineering goals,

we were successfully able to transmit across 100m. This is due to the strenght of the 27 MHz transceiver signal power where it could transmit to a max of 100m. Also, we were successful in making the AM Transceiver device to be able to transmit sounds whether rain or shine, as it was a factor did not matter.

However the AM transceiver device was not able to be transmitted at different levels of altitude. This is probably due to the terrain signal concept.

4.5 Areas for improvement

We feel that the soldering of the components onto the circuit better could have been improved. We understood that the way we soldered could affect the experiment. Being beginners in soldering, we may have soldered the components in an incorrect way as there may be a certain technique on how to solder/desolder.

Another area that we felt that we could have improved is the way we inserted the components onto the circuit board. What we meant by this was that sometimes, a component eg. the wire of the resistor is not being placed perfectly into the circuit board. This is especially so when we were soldering the resistors when most of the resistors could not be placed properly as it had been bent when he had wanted to place it in.

Another area which we felt that we could have improved was the precision of the details when we tested the transceiver device out. In our table, we indicated it to be sunny or rainy day. But, after which, we realised that how sunny is sunny and how rainy is rainy. It could have been better if we were precise and accurate. Additionally, for the altitude tests, it would have been more accurate and precise if we had out how many metres tall was the altitude.

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