He Shengzhong pointed to the multiple large mechanical equipment placed on the table and said: "Your Majesty, this is the radio transmitter unit we developed!"
Then he pointed to several pieces of mechanical equipment on the other side and said, "This is our radio receiving unit!"
As he spoke, he personally stepped forward to test the operation and said: "Similar to the wired telegraph, we convert the text into codes, and then send the coded signals through this transmitter!"
"The signal will propagate through electromagnetic waves. The receiver will receive the electromagnetic signal and then convert it into information encoding. After interpretation, the message can be obtained!"
"The principle of the entire system is largely the same as that of wired telegraphy. The only difference is the signal propagation channel. We use electromagnetic waves to directly replace electrical signals!"
Li Xuan looked at the two huge sets of units in front of him, which somehow reminded him of the primitive computers of later generations, which seemed to be also super huge.
He could understand why it needed to be so huge. It was just that the technology was not up to par, but wireless telegraphy was still needed.
However, the large size does not matter. This is just a first-generation test prototype. As long as the basic design principles are figured out and can be built, then it will naturally be able to continue to develop and reduce the size and weight.
What's more, the current size is only relative to that of later generations. For this era, a weight of several hundred kilograms is nothing!
Even if this thing is used now, it is fixedly installed somewhere, or simply installed on a battleship. It doesn't matter hundreds of kilograms or even thousands of kilograms. The key is that it can be used.
So he asked directly: "You have tested it before, what was the result? How far can the signal be transmitted?"
He Shengzhong said: "When we conducted the test before, we have already achieved success in the test. We successfully launched the electromagnetic model and it was received by the receiver. Next we will conduct a distance test. According to our calculations, now
The information transmission distance of this prototype machine can reach at least twenty kilometers, or even further, but the specific distance depends on the terrain."
"After all, the earth is round, and the signal transmission process will be greatly affected by curvature and terrain, causing the signal to continue to weaken!"
"But we have known before that the atmosphere can reflect electromagnetic waves. We are currently studying the electromagnetic wave reflection phenomenon in the atmosphere to determine the wavelength of the electromagnetic waves, and finally conduct ultra-long-distance signal transmission experiments!"
"However, according to the specific situation, it is necessary to wait for the completion of relevant tests before the next generation of wireless telegraph machines can be manufactured for relevant tests."
After hearing this, Li Xuan nodded slightly. Wireless telegraphy had just been developed and it was already very good at transmitting signals. We couldn't expect it to be developed all at once and enable transoceanic signal transmission.
Moreover, the technological leap of this thing is not big. Once you get started, the follow-up will be simple!
Li Xuan immediately said: "Can this machine test one or two now?"
He Shengzhong said: "Yes, we have a similar signal receiver in the laboratory in the east of the college, which can send signals directly!"
Li Xuandao: "Then give it a try!"
As he spoke, he pointed to a group of civil and military officials behind him and said, "They are all waiting to see!"
Everyone present knew the importance of wireless telegraphy. Regardless of whether they were cabinet officials or military generals, everyone was eagerly looking forward to the wireless telegraph machine.
Because the empire's ministers believe that communication systems such as wireless telegraph machines can effectively strengthen the empire's rule over global territories and further curb the possibility of rebellion in overseas territories.
The timely and smooth transmission of information has always been something the Tang Empire attaches great importance to, and is even the basis of its rule.
This point is not unique to the Tang Empire. In fact, the Chinese Dynasty has always attached great importance to information transmission.
The previous dynasty’s inn system is the most typical example!
The Tang Empire also vigorously developed the post station system in the past. Every day, countless post station horses galloped on the road to deliver various military information and official documents. Later, the navy even specially developed clipper ships to serve as communication ships.
Later, after the emergence of high-pressure steam engines, trains appeared, and steam ships came out, the corresponding trains and steam ships also became the main means of information transmission.
Even now, many trains serve as postal trains. In addition to transporting passengers and goods, trains also transport a large number of letters simultaneously.
At the same time, the Navy also developed fast communication ships using steam engines, which reached such speeds that they could quickly communicate with sea areas around the world.
Later, after the invention of wired telegraph, the Datang Telegraph Company was established instantly and within a few years, telegraph lines were erected along the railway lines.
Immediately, Datang itself entered the telegraph era.
What happens in the place where there is a telegraph can be quickly known to the place on the other side where there is also a telegraph.
This shows that the Tang Empire attached great importance to communications.
And the current wireless telegraphy can make the communication system of the Tang Empire further and more complete. These imperial ministers naturally attach great importance to it.
It doesn't matter whether they value science or not. They simply value the speed of information transmission and the rule of the empire.
Li Xuan ordered a test, and the Royal Institute of Technology had already prepared it. Today's inspection originally included a test.
After some preparations, He Shengzhong stepped forward and said: "Your Majesty, you are ready!"
Li Xuan said: "Then let's start!"
He Shengzhong said: "Then what content should I post?"
Li Xuan said: "Whatever you want, just send today's date!"
It doesn’t matter what the content is, what matters is that it can be sent out and received!
Soon, the researchers on the telegraph machine began to work, but the operation seemed to be very simple, no different from ordinary wired telegraph transmission, there was a telegraph operator pressing the button!
After pressing the button, He Shengzhong stepped forward and said: "Your Majesty, the signal has been sent!"
Li Xuan nodded slightly. After the signal was sent, another receiver in the laboratory also received the signal.
The wireless telegraph receiver had already started working and quickly translated the message, which was exactly the date it was sent.
But people still waited, waiting for information from the receiver in the laboratory a kilometer away.
Not long after, the sound of horse hooves was heard outside, and soon a telecommunications secretary from the Hanlin Academy dismounted, and then presented the telegram to Li Xuan, saying at the same time: "Your Majesty, this is the telegram that I personally accepted!"
Li Xuan took it and saw that it was the telegram he had sent out, "November 16, the 40th year of Xuanping".