Chapter 73: Liberating the Global Senior High School Students

Wednesday.

Relying on his deep connections and even deeper shamelessness, Wang Ning got a second-hand GR3188 repeater from the HAM group in Nanjing. He asked Xiao Zhu to drive it to the command center that day. The base station used in the repeater was the same as the one found by Banxia, ​​both were Motorola GM300.

When Bai Yang returned home from school that evening, the living room had turned into a large second-hand electronic scrap collection station. Lao Wang and his father were squatting among the scattered electronic components and screwdrivers, wrenches and screwdrivers, surrounding the Icom725 radio and GR3188 analog relay, just like two computer repairmen.

"Give me the blueprint. I'll find where this COR OUT port is..."

"Where's the multimeter? Did you bring it? I'll ask Xiao Zhu to bring it over."

"It's broken. I need a soldering iron to connect it. Can I find a soldering iron over there? And rosin?"

"Why worry about that? There's no soldering iron in the whole city of Nanjing."

"Where was this broken relay used before? Why can't I clean it? My hands are all dirty when I touch it. It's so filthy."

"rag!"

Bai Yang entered the room and threw his schoolbag on the bed. His mother was sitting on the bed in her bedroom, browsing her phone. She looked up and called out, "Yang! The food is in the pot in the kitchen!"

"I know."

Bai Yang went into the kitchen and opened the lid of the pot, which contained warm noodles.

He carried the bowl of rice and slowly returned to the living room, squatting beside Wang Ning and Bai Zhen. The two middle-aged men were busy. They disassembled the outer casing of the repeater and removed the cooling fan, revealing all the interfaces and the complex tangled cables.

"It's so complicated." Bai Yang smacked his food. "Can she handle it?"

"It's not complicated at all." Wang Ning was busy tightening the screws. "As long as you can understand the internal technical logic, it's very simple to operate... Damn, it's broken!"

"You know that the communication network is divided into seven layers, right?" Bai Zhen said, "The bottom layer is the hardware, and the upper layer is the protocol. In fact, the superstructure is important. As long as you understand the logic of the encoding, the hardware can be dealt with. For example, if you have the ability to transmit images, then whether you use a 4K LCD screen or an old black and white TV, you can watch "Avatar". The only difference is the picture quality... Damn, it's broken again!"

"The principle of this thing is very simple. I've told you before that the relay controls the sending and receiving of the Guai Liang Wu. You can use the walkie-talkie to remotely contact the relay and achieve the effect of a mobile phone." Wang Ning pulled out a small green printed circuit board from the relay station. It was the size of a thumbnail and was connected to a thin white wire. He held it up to show Bai Yang, "Here, look, this is it. When the time comes, you can use it to connect the relay and the Guai Liang Wu together. As long as you find the right interface and pins, it can accomplish a lot of tasks."

"Almost all the cables in this room have a copper core, but the types of signals they transmit are different." Bai Zhen pointed around, "Same hardware foundation, different network protocols."

"So..." Bai Yang hesitated, "We still have to teach her the OSI seven-layer model?"

"Combining theory with practice is of course the best. It would be fine as well to teach her to understand the TCP/IP protocol." Wang Ning nodded.

"But even I don't understand it." Bai Yang still had noodles in his mouth and spoke unclearly, "How can I teach others?"

"How could you not understand?" Wang Ning glanced at him with a strange look in his eyes, "Isn't this common sense?"

"How could you not understand?" Bai Zhen also glanced at him with a strange look in his eyes, "Isn't this common sense?"

Bai Yang held it in for a long time, then angrily counterattacked:

"Why can't you two get into college? Isn't it enough to have hands?"

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"Hmm... BG4MXH, this sounds difficult."

Banxia was a little troubled.

She had paper and pen on her desk, ready to be a good student who listened attentively, but the other party started with a long list of English abbreviations for network protocols that made her dizzy, such as TCP, UDP, ICMP, this P and that P, just like a student who had just finished learning addition, subtraction, multiplication and division and was flipping through Volume 10 of the Encyclopedia of Mathematics.

"BG4MXH, I don't understand anything. These things are so difficult. Do I have to learn them?"

"This is theory, OVER."

“What’s the use of theory?”

"Theory is useless, OVER."

"Then..." Banxia asked cautiously, "Can I not learn it if it's useless?"

"You don't have to learn it, OVER."

Bai Yang is decisive.

Banxia was cheering on the other end, and there was also the sound of a pen being thrown.

As a person living in a post-apocalyptic era, for the first time in her life, she experienced the great joy of having an exam cancelled at the last minute.

What a precious experience this is.

"Miss, I'm telling you, anyone who forces you to learn complex theoretical knowledge is a demon. Is there anything more useless than a set of conic sections and quadratic function series? No! If there is, it's to calculate how many times a charged particle can rotate in an electric field and a magnetic field... Mathematics go to hell! Physics go to hell! Mathematical physics go to hell!"

"To hell with mathematics! To hell with physics!" Banxia also shouted, "To hell with mathematics and physics!"

"Math and physics exams go to hell!" Bai Yang shouted, "Down with the three mountains of math, physics and chemistry!"

"Down with the three mountains of mathematics, physics and chemistry!"

"Liberate the world's high school seniors!"

"Liberate the world's high school seniors!"

"Hurry up and do your job." Dad knocked on the door outside, "Otherwise, all the high school seniors in the world will die, and who will you liberate?"

Banxia opened the outer casing of the GR3188 repeater station. She had to understand the structure of the repeater station first under Bai Yang's guidance. The structure of the GR3188 analog repeater station is quite simple, or in layman's terms, it is big, black and crude. When you open the back cover, you will see the cooling fan and messy cables. After removing the fan, you can see the tail interface of the internal base station. The basic components of GR3188 are two base stations, a repeater control board and a duplexer, which are stacked in three layers from top to bottom.

Banxia does not need to modify most of the components of the repeater station. In Wang Ning's words, the hardware of the repeater station itself is sufficient to support your needs, just like a movie that can be played on a color LCD screen can also be played on a black and white TV. All Banxia has to do is find the right interface and insert the correct plug into the correct interface. Only experienced experts know how to plug it in, so full guidance from Wang Ning and Bai Zhen is needed.

Bai Yang was very glad that building a remote control system did not involve too precise operations, and Banxia did not need to hold a soldering iron to solder the PCB board, otherwise it would be like forcing someone to do something they were not prepared for.

"Miss, tell me what you saw now, OVER." Bai Yang asked, pinching her microphone.

"Hmm..." The girl was wearing headphones, and the GR3188 repeater was placed on the table in front of her. Banxia tilted her head and drilled into the case. "I saw a lot of wires, red, black, and white, some thick, some thin, a mess."

"What else? What else is inside the case? OVER."

"There are two amateur radio stations inside the case. They are stacked one on top of the other and fixed in place with screws. They can't be removed." Banxia continued, "There are several thick wires plugged into the radios."

"Don't touch it. What else? OVER."

"There is also a black iron box at the very bottom of the chassis. There is no opening. It is sealed."

"You don't have to touch this." Bai Yang said, "Miss, listen carefully. I'm going to tell you which interfaces we will use and which ones we won't use. OVER."

"Yeah, I'm listening." Banxia nodded.

"First, count how many wires are plugged into the two base stations," Bai Yang instructed. "How many sockets are there? OVER."

"One... two, three..." The girl began to count, "Six wires, a total of six wires, three wires are plugged into each radio station, one is the thickest, black, and the plug is wide and flat, another is black, and the plug is round, and the last one is white, the thinnest, this wire is connected to a black square plastic piece, and plugged into the base station..."

"That's a green plastic sheet, OVER." Bai Yang said.

"Green?" Banxia opened her eyes wide, "No, it's black."

"That's because there's too much dust and it's too dirty." Bai Yang said, "The plastic piece can be pulled out. Just pull it out and wipe it. OVER."

A moment later, the girl's scream was heard from the headphones.

"Really? It's green! There's a circuit on it!"

"Yes, this is a PCB board, or printed circuit board. Printed circuit boards are all green." Bai Yang explained, "What we need is this interface, this thin white wire, which will connect the repeater station and 725 together. Do you understand? OVER."

Banxia nodded, not quite understanding.

"Understood."

BG4MXH once said that attending class is learning, and learning is attending class. Attending class and learning are hardships that everyone must go through in their growth. Every child who grows up to the age of seven is forced to enter a prison and concentration camp called school, from then on losing his freedom and not being liberated until at least the age of twenty-two. Now, Banxia looks at the relay station that is like a black box in front of him. When he thinks that he must understand it, he feels that the world before the end of the world was not all good.

Not going to school is really good.

(End of this chapter)