Fu Xin replied casually: "It is estimated that the Japanese forgot something here." ”

Liu Yi frowned, and asked with doubt: "Japanese, what did the Japanese leave here, the emperor is far away, besides, how can you judge that it was left by the Japanese?" ”

Fu Xin spread his hands, pursed his lips undeniably, and said, "Brother Liu, I didn't say that it was something that the Japanese left here now. Besides, it is almost impossible for the people to have this kind of thing, and at first glance it is left behind by the army. There is no need for our country's own army to hide the radio here, you say, this is not a Japanese flow, who left it, besides, the plaster flag is printed on it! ”

"Xinzi, you mean that this thing is left over from the invasion of China by the dog?" Liu Yi still didn't step forward, so he hadn't seen what was inside, so he just guessed and asked Fu Xin.

Fu Xin said with emotion: "Ten **! There is a plaster flag painted on it, and I can't think of anyone else except the Japanese! ”

"Xinzi, you've sold so many guanzi, can you tell me what's inside!" Liu Yi couldn't help but ask.

Fu Xin nodded and said, "What is placed here, judging from the appearance, I can judge that this is a radio station." Do you think that radio is something that ordinary people can have? Is it something that could have existed in a bygone era? So I can judge that there is no danger anymore. ”

"Radio! But let's be careful, those Japanese who invaded China don't have a few good things, maybe they will set up some tricks here, such as bombs and the like! Liu Yi felt that he still needed to be careful, so he reminded.

Fu Xin thought about it, Liu Yi was right, nodded, and the two walked cautiously towards this corner.

Things were as Fu Xin expected, and until he touched the radio station with his hand, there was no danger. Liu Yi thought about it, and he was right, if he hid it so secretly, it was unlikely that he would set up any more harmful organs.

Liu Yi was thinking about this, but Fu Xin was different, Fu Xin was surprised, because the radio station inside was unlikely to be left by the Japanese who invaded China, and the radio station in front of him was a frequency-hopping radio!

Fu Xin clearly remembers that it was not until the mid-70s of the 20 th century that the United States and Britain began to develop frequency hopping radios. In the early eighties, production began and gradually equip the troops for use. On this point, there is no possibility that it was left over from the Japanese invasion of China.

Because this time is not right, no matter how powerful the Japanese are, it is impossible to surpass Britain and the United States so much that they can do it during World War II. So the only explanation is that Fu Xin's heart jumped when he thought of this. There are spies in Yicheng at work! The radio station is hidden here by spies!

"Brother Liu, we have to leave quickly!" Thinking of this, Fu Xin immediately said.

What's the matter, Liu Yi didn't realize so much, but picked up the treasure he thought he had found, a piece of high-quality Hetian jade seed material Panlong cloud pattern jade pendant in his hand and rubbed it in his hand, thinking about what to do with this jade pendant, and his heart was really happy to be tight, he didn't expect him to find the treasure too.

Therefore, Liu Yi immediately asked: "What's the matter, is there something wrong with this radio station?" ”

Fu Xin also noticed that Liu Yi was rubbing a jade pendant, so he dragged Liu Yi up and said, "Brother Liu, this jade pendant belongs to you, you take it home to study, we have to hurry up and take this radio station and this notebook!" It's a big deal! ”

"What's going on? Explain it to me, don't leave me confused! Liu Yi didn't study the radio station, although he saw that the radio station was very new, and he didn't think much about it, because the radio station was so sealed that maybe no air came in, so it was fine.

Fu Xin said urgently: "Brother Liu, I won't explain too much to you!" Let me tell you briefly, this radio station is not left over from the Japanese invasion of China, but is hidden here by spies, because this radio station is the latest product of the Americans, and they have just equipped their troops! ”

"That's it......" Speaking of this, Liu Yi's hand shook, and Yu Pei almost fell to the ground, only then did he react, and said with some horror: "You say, we accidentally discovered the spy's nest?" ”

Fu Xin nodded with a heavy heart.

"Then let's hurry up, take our things with us, and then go to the police and ask the public security to deal with it." Liu Yi said with some fear in his heart, although he used to mix in the road, but he was only a big gangster at best, compared to a spy, far worse!

Moreover, Liu Yi is also a person with a strong sense of nationality, and when he encounters this kind of thing, he naturally goes to the police without hesitation!

The two discussed, carrying the radio station was too conspicuous, just right, there was also a cloth bag here, and finally, the two put the radio station in a cloth bag, and hid a stack of books inside, and then put the organ back in place, immediately out of the Chongwen Tower, decided to go in the direction of the mountain, first hide the radio station and talk.

Liu Yi is quite familiar with the terrain of this area, according to what he said, he has a brother who lives in this mountain, and he has gone to his brother's house to eat a few times, so there are not a few people who come here.

Under the leadership of Liu Yi, the two found a hidden col, and then stopped.

The two of them sat on a big reddish-brown stone panting, when Liu Yi suddenly asked, "Xinzi, what should I do with this radio station, the information, and this jade pendant!" Will it all be handed over to the police? ”

It's better not to touch the spy's stuff! Fu Xin thought so at first, but now after a period of running, Fu Xin has changed his mind, this radio station contains a lot of technology, is it to be greedy for ink and only hand over information?

You know, frequency hopping radio is now an advanced baby!

A frequency-hopping radio is a radio communication device in which the carrier frequency changes with time. Because the sequence of frequency hopping is determined by the pseudo-random code sequence, it is not easy for the enemy to identify and implement interference, so it is a kind of radio station with strong anti-jamming ability.

The working principle and composition of the frequency hopping radio station are basically similar to that of ordinary radio stations, but its output and input circuits are quickly tuned in a wide frequency band, and there is a frequency hopping control unit to realize the hopping of the carrier frequency.

The frequency hopping control unit is composed of a code sequencer and a frequency hopping synchronizer. The pseudo-random code sequence controlled by the key generated by the code sequencer controls the frequency synthesizer of the transmitter and the receiver, so that their frequencies are changed with the sequence determined by the code sequence. A frequency-hopping sequence makes up a frequency-hopping pattern.

Stations on the same communication network can only use the same frequency hopping pattern. In order to achieve communication, the carrier frequency of the transmitter and receiver must be tightly synchronized by the frequency hopping synchronizer.

In order to form a multi-network work and avoid mutual interference between networks, each network must use different frequency hopping patterns, and the dwell time of each frequency between the networks should be kept strictly calibrated from start to stop, and the frequencies used in the same dwell time are different, this networking mode is called orthogonal networking.

Because the carrier frequency of the frequency-hopping station jumps rapidly over a fairly wide frequency range, the enemy cannot carry out targeted jamming. The greater the number of frequency hopping and the wider the frequency range, the stronger the anti-interference ability of the station.

In order to deal with the enemy's tracking interference, the rate of frequency hopping should not be too low. If the frequency hopping rate is fast enough, the change of the enemy's jamming frequency cannot keep up with the speed of the working frequency hopping, and it cannot constitute interference.

"Xinzi, what are you hesitating about?" Liu Yi saw that Fu Xin had been thinking and did not answer his question, so he spoke.

"Do you want to hand it over?" Liu Yi asked this, Fu Xin still didn't say anything, but still thought quietly......

After a while, Liu Yi couldn't help it, and said: "Xinzi, if you want to cut off the beard, cut off the beard, to be honest, I like this jade pendant very much, and I don't really want to hand it over." ”

When Liu Yi said this, Fu Xincai turned around and said to Liu Yi: "Brother Liu scolded me for thinking now, is it to put personal interests first?" Or the national interest is the priority. ”

When asked this question, Liu Yi was also silent, this question, if it was easy to say in normal times, he would definitely say that the interests of the country are the most important, but at this exciting moment, it is difficult for him to answer.

Fu Xin said to himself: "If you want to say that personal interests are the most important, but there is no country, where is the home, the country is still very important: but if the national interests are the most important, I am moved by the radio station in front of me, and it is a fool not to take advantage of it." ”

"Xinzi, if you want me to say, just like this, let's hand over this pile of useless materials to us, what about you, cut off the Hu Hu of the Osprey Radio, and what about me, just cut off this jade pendant, how about it?" Liu Yi said with a big grin.

Fu Xin shook his head and said, "Brother Liu, you think too simply! The strength of the intelligence services is not something we can imagine, and if we hand over only a part, they will definitely find out. Once we find out, we're in trouble!

Don't mess with anyone in the intelligence department! I'll use an analogy, it's not that I belittle or hate the intelligence service, which is an annoying fly that pervades everything. ”

Liu Yi thought of the scene of the arrest of spies during the Republic of China that someone had told him before, and his body couldn't help shaking, and said: "Xinzi, let's just hand it over, in case the intelligence department is provoked, it will be very big trouble!" ”

"But I'm not reconciled!" Fu Xin stared at the brand-new frequency-hopping radio station and said very reluctantly.

"But what's the solution!" Fu Xinyi reminded Liu Yi that he thought more, and Liu Yi continued: "Xinzi, you said that this intelligence department is pervasive, and we hide these things privately, can we not be known by them?" If this is found out, the two of us may be suspected of being spies, and at that time, it will be even more troublesome than us handing over a part! ”

"Unwilling!" There was no one in the valley, Fu Xin shouted in a low voice. (To be continued.) )