We Live In Nanjing

  Chapter 73 Liberation of Global Senior High School Students

Wednesday.

Wang Ning relied on his bottomless connections and deeper bottomless skin to get a second-hand GR3188 relay station from the HAM group in Nanjing, and asked Xiao Zhu to drive it to the headquarters on the same day and use it in the relay. The base station is the same as the one found in Banxia, ​​and the model is Motorola GM300.

When Bai Yang came home from school that night, the living room had become a large second-hand electronic waste collection station. Lao Wang and Dad squatted in scattered electronic components and screwdrivers, surrounded by Icom725 radio and GR3188 analog relays. It looks like two door-to-door repairers.

  "Give me the drawing, I will find where the COROUT interface is..."

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

  "It’s broken. I don’t have to use an electric soldering iron if I want to wire it? Can I find an electric soldering iron over there? What about rosin?"

  "Worry about a fart, can't find an electric soldering iron in Nanjing?"

   "Where did you put this broken relay before? Why didn't it wipe it clean? One hand is black, and one is dirty."

   "Drag!"

  Bai Yang entered the room and threw the schoolbag on the bed. Mother sat on the bed in her bedroom and swiped her phone. She raised her head and shouted: "Yang! The food is in the pan in the kitchen!"

"Know it."

  Bai Yang went into the kitchen and opened the lid. There was warm noodles in the pot.

Holding his rice bowl, he slowly returned to the living room, squatting next to Wang Ning and Bai Zhen. The two middle-aged men were very busy. They took apart the shell of the repeater and removed the cooling fan to expose all the interfaces and A complex cable formed into a ball.

   "It's so complicated." Bai Yang ate something, "Can she do it?"

   "It's not complicated at all." Wang Ning buried his head and screwed the screw, "As long as you can understand the internal technical logic, the operation is very simple...Fuck it, 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 important thing is the superstructure. You only need to figure out the logic of the coding and the hardware can deal with it. For example, if you have the ability to transmit images, you can enjoy "Avatar" no matter if you are using a 4K LCD screen or an old black and white TV. The only difference is the image quality...Fuck, it's broken again! "

"This thing is very simple in principle. What I have told you before is that the relay controls the sending and receiving of the two to five. You can remotely contact the relay with the mobile station to achieve the effect of a mobile phone." Wang Ning worked hard. Pull out a small green printed circuit board from the repeater, the size of a thumb nail, and a thin white wire connected to it. Take it up and show it to Bai Yang, "Hey, look, it's this thing. Use it to connect the relay and turn two or five together, just find the correct interface and pin, it can complete a lot of work."

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

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

   “The combination of theory and practice is of course the best, and it’s okay to teach her to understand the TCP/IP protocol.” Wang Ning nodded.

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

  "Why don't you understand?" Wang Ning glanced at him with a strange expression, "This is not common sense?"

  "Why don't you understand?" Bai Zhen also glanced at him, his eyes were also strange, "This is not common sense?"

  White Yang held back for a long time, and then fought back:

   "Why can't you two get into college? Isn't it just a hand?"

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

  Banxia is a bit difficult.

With paper and pen on her desk, she was going to be a good student who listened carefully, but the other party came up with the English abbreviation of Chase Network Protocol, which made her feel dizzy. What TCP, UDP, ICMP, this P and P are comparable to just finished learning. Students who add, subtract, multiply and divide openly read ten volumes.

   "BG4MXH, I don't understand at all, these things are so difficult, do I have to learn it?"

  "This is theory, OVER."

   "What's the use of theory?"

  "The theory is useless, OVER."

   "That..." Pinellia asked cautiously, "Can I not study if it's useless?"

  "You can skip learning, OVER."

  The white poplar is crisp and neat.

  Banxia cheered over there, and there was the sound of throwing pens.

  As a person living in the post-apocalyptic era, for the first time in her life, she experienced the great joy of temporarily canceling exams.

  What a precious experience.

"Miss, let me tell you that anyone who forces you to learn complex theoretical knowledge is a devil. Is there anything more useless than the set of conic quadratic function series? No! If you want to say there must be, then It’s counting how many revolutions a charged particle can make in the electric and magnetic fields... Mathematics to death! Physics to death! Let mathematics and physics go to hell!"

  "Mathematics die! Physics die!" Banxia also shouted, "Let mathematics physics go to hell!"

  "Go to **** on the math test, physics test!" Bai Yang shouted, "Down with the three mountains of mathematics, physics and chemistry!"

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

  "Liberate the world's senior high school students!"

  "Liberate the world's senior high school students!"

   "Hurry up and do business." Father knocked on the door outside, "Otherwise the senior high school students all over the world will be dead. Who are you going to liberate?"

Banxia opened the shell of the GR3188 repeater. Under Baiyang’s guidance, she must first figure out the structure of the repeater. The structure of the GR3188 analog repeater is quite simple. In layman's terms, it is stupid and thick. Cooling fan and messy cables. Remove the fan and you can see the end interface of the internal base station. The basic components of GR3188 are two base stations, as well as the relay control board and the duplexer, which are from top to bottom. Stacked into three layers.

Most of the components of the repeater station do not need to be changed. In Wang Ning’s words, the hardware of the repeater station is sufficient to support your needs. It is like a movie that can be played on a color LCD screen, and a black-and-white TV can also play it. What Banxia has to do is to find the right interface and insert the correct plug into the correct interface. Only experienced veterans know how to plug it, so Wang Ning and Bai Zhen's full guidance is needed.

  Baiyang is very fortunate that the establishment of a remote control system does not involve too sophisticated operations. It is not necessary to hold Pinellia to solder the PCB board with an electric soldering iron, otherwise it will really be a duck to the shelf.

  "Miss, now tell me what you saw, OVER." Bai Yang asked, squeezing his hands.

"Hmm..." The girl was wearing headphones, 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, some red, black, and white. , There are coarse and fine, messy."

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

"There are also two amateur radio stations in the case. The two radio stations are stacked on top of each other and fixed in the case with screws. They can’t be taken out." Banxia continued, "There are several thick wires plugged into the radio’s bottom. superior."

   "Don't touch it, what else? OVER."

   "There is also a black iron box, at the bottom of the inside of the case, no opening is seen, it is sealed."

  "You don't need to touch this." Bai Yang said, "Miss, listen carefully. I will tell you which interfaces we need to use and which ones are not, OVER."

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

  "You first count how many wires are plugged into the bottoms of 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 are plugged into each radio station, one of the thickest, black, the socket is wide and flat, and the other black, the socket It is round, and the last one is white, the thinnest. This wire is connected to a black square plastic sheet and inserted into the bottom of the base station..."

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

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

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

  After a while, the girl's exclamation came from the headset.

  "Really! It's green! There are circuits on it!"

"Yes, this is a PCB, that is, a printed circuit board. The printed boards are all green." Bai Yang explained, "What we need to use is this interface, this thin white wire, which will relay Channel and 725 are connected together, can you understand? OVER."

   Banxia nodded seemingly.

"Understood."

BG4MXH once said that class is learning, and learning is class. Class learning is the hardships that everyone has to go through in growing up. Every child must be forced to enter prisons and concentration camps called schools when he is seven years old. Since then, he will lose freedom. At least He won’t be liberated until he is twenty-two years old. Now Banxia looked at the black box-like repeater in front of him, thinking that he had to understand it, and suddenly realized that the world before the end was not good everywhere.

  It is really good not to go to school.

  (End of this chapter)