♂?，，
At 7:30 in the morning, Dongling City Wireless Monitoring Station.
Xiao Zhang, who had just graduated from school and been assigned to the unit, arrived early at work as he did every week. He unlocked the security door of the monitoring room with his key and turned on the surveillance equipment with excitement. Today was not originally his turn for duty, but rather Lao Du's, who was responsible for mentoring him. However, Xiao Zhang was very interested in these devices and enjoyed the process, so he took over Lao Du's Saturday morning shift to thank him for his careful guidance over the past few days.
Young people are like this, especially those who have just graduated from school and been assigned to a new unit, they are full of energy and eager to work 24 hours a day.
Xiao Zhang finished eating the fried dough sticks and soy milk in his hand, then started working.
He quite likes this job, monitoring the wireless electrical status of the entire Dongling City every day, giving him a sense of having everything under control. Moreover, sometimes when they discover abnormal situations, they can also listen in on specific signals, which feels like eavesdropping on someone's secret conversation, an extraordinary thrill and freshness.
As usual, he turned on several surveillance devices and listened slowly in the order of wavelength from short to long.
Actually, their work is quite leisurely. Dongling City only has a few places to send out wireless signals, and he's familiar with them all. For example, the director of the wireless monitoring station has a radio at home that his son plays with when he's bored. There are also several members of the amateur wireless club in the city. Oh, right, there's also a big shot, specifically entrusted by Master, located in Xinfu Town, Dongling City. Master said no matter what the other party does, don't interfere and don't listen, otherwise you might get into big trouble.
It's probably still early, and at this moment, there aren't many signals, just intermittent signals coming from the direction of the station master's home. Listening to the content, it seems to be a CW signal. As for what specific content it is, Little Zhang was a bit confused. Before work, he had never studied Morse code, although he had heard of it when reading books before, but had never actually memorized or used it specifically.
He now makes learning Morse code his top priority every day. According to his master, if the staff at the monitoring station don't understand this, how can they monitor?
"Huh?"
Little Zhang, who was listening very responsibly, suddenly found that the signals in the frequency band began to increase at one point. He looked at the wall clock and saw that the pointer was pointing to 8 o'clock sharp.
It was as if a mysterious order had been given, and suddenly the frequency band became extremely lively. From extreme silence to extreme liveliness, it only took less than a minute for everyone to seem to have received some kind of signal, just like starting to send signals outward from 8 o'clock.
"What's going on?" Little Zhang hastily picked up the headphones of other radio stations to listen, and found that it was also like this on other frequencies. He panicked at once, he had never encountered such a situation before, and his master had not told him about it either.
"Is there some kind of conspiracy going on here?"
An idea suddenly flashed into Little Zhang's mind, since becoming a staff member of the monitoring station, he had been expecting every day to discover an enemy spy signal and then capture him personally.
His heart began to thump uncontrollably as he thought of this, and he no longer hesitated. He took off his headphones and immediately ran out of the monitoring room. He was going to find the stationmaster's office to report this important situation to him!
However, he had just run a short distance when he met his master Lao Du halfway.
Although his apprentice Xiao Zhang said he would help him with the shift today, Old Du still came over. After all, Xiao Zhang was not very reliable when it came to getting things done, and Old Du couldn't shake off the feeling of unease leaving him alone.
Lao Du saw Xiao Zhang rushing over with a flustered face and directly blocked his way, asking: "Xiao Zhang, what's wrong?"
"Master, you're here? That's great!" Little Zhang's face showed a look of surprise, he hastily said, "I've discovered an abnormal situation has occurred, I was just thinking of reporting it to the station head!"
Old Du looked at him suspiciously: "Abnormal situation?"
"Yes, I was just listening in... Ah, Master, come and listen for yourself, I don't know how to say it." Little Zhang said, then turned around and ran back to the monitoring room.
"This young Zhang is still a bit too rough around the edges." Old Du shook his head calmly and followed behind him, step by step.
"Master, hurry up." Little Zhang said somewhat anxiously.
"I'm old, and my legs aren't as agile as they used to be."
Lao Du gave him a cold humor and slowly sat down on the chair, picking up one of the headphones to listen.
Xiao Zhang watched from the side for half a day without seeing any clear meaning on Master's face.
"Master, what's going on? Isn't this signal very abnormal? Is there some kind of conspiracy?" Little Zhang's hometown is a southern coastal city, and he originally had a bit of an accent when speaking. This time, in his haste, he mistakenly said "conspiracy" as **.
"What a fart!" Old Du cursed with a smile, and continued to say, "This is that group of stinky boys participating in the amateur radio competition! I've been saying let them memorize Morse code, but they just ignored me!"
"I've got it on my back!" Little Zhang smiled awkwardly, knowing he had made another mistake. He was secretly relieved that his master had arrived in time, otherwise he would have gotten into trouble with the stationmaster and ended up crying.
"Master, what's going on with the competition you just mentioned?"
"This is the last weekend of November, and there's a major event...". Old Du briefly told Xiao Zhang about the CQWW_DX contest, "These things are basically necessary to know. I'll give you some basic internal materials later, take a good look at them carefully, so as not to make such low-level mistakes again in the future."
"Thank you, Master! You've been too good to me, I don't know how to express my gratitude!"
"Stinky kid, just don't get me into trouble." Old Du chuckled and shook his head. This kid was a bit reckless, but he had a sweet mouth and knew how to interact with people. Old Du was happy to give him some guidance.
"Master, I still have a question." Little Zhang hesitated for a moment, seeing that Master's mood was not bad, and finally summoned up the courage to speak out, "What if someone takes advantage of this opportunity to send illegal signals outside? Wouldn't we be unable to monitor it?"
"Ah, you're still not giving up, are you?" Old Du said with a mixture of laughter and tears. "In theory, it's possible that this exists and is hard to detect, but the probability is extremely low, and even if it did exist, it wouldn't be in our Dongling City. Ah, stop your wild speculations! Go, flip the switches numbered 7, 8, and 9 on the second row of the control panel."
"Oh." Little Zhang scratched his head, walked to the control panel and opened the three switches as required by Master. He curiously asked: "Master, these three switches seem to be the switches for releasing interference signals?"
"Right back at you." Old Du nodded, "What was just said wasn't unreasonable either, but in this situation, we're also powerless. We can only add some seasoning for them and give it a little meaning." As he spoke, a proud expression appeared on his face.
Talking about Dongling City's wireless electromagnetic interference equipment, it has also won the provincial-level Science and Technology Innovation Grand Prize. Although its symbolic significance is greater, after all, it is also a provincial grand prize winner. And Old Du was one of the joint researchers of these devices.
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