"As long as it is a communication based on radio technology, whether it is a direct voice call or an encrypted message transmitted on the airwaves, no matter how advanced their technology is, there must be a principle."

Northern Review.

Technical room in the Telecommunications Division.

A bespectacled devil expert talked eloquently:

"Receivers and transceivers must be in the same radio channel in order to communicate with each other and relay information."

"So we just need to find and lock the channel and be able to listen to its communications."

"If it's a voice call, you can also listen to it directly, and there is no possibility of encryption for voice, if it's an encrypted radio wave, you can only record it and then hand it over to the code-breaking team to crack it."

During World War II, the theory of integrated circuits did not appear, and the primitive and huge components made the encryption of voice signals an impossible thing even in the eyes of top experts.

You know, in the seventies of the twentieth century, voice signal encryption technology began to appear.

Even during the Vietnam War, there were cases of scolding across the channel.

"Since the other party can communicate in real time and temporarily change the landing site, it must be a direct voice call."

Hearing this, Naoto Matsuzaki looked at the military expert who had come from Imperial University.

The Imperial Intelligence Department has fought so many times with the Tubalu Underground Party lurking in Beiping, and it is naturally impossible to gain nothing.

In fact, on several occasions, the special high school and the military intelligence department discovered the location of the landing of the Tu Eighth Route aircraft in advance and made deployments, but in the end, the Eighth Route aircraft did not land.

Obviously, Tuba Road has a timely warning system, which can notify the ground situation of the transport aircraft in time.

"Our next task was to find the channel they were using."

The technologist continued.

At this time, his tone became solemn:

"However, from the seized communications equipment of the Eighth Route Army, it can be known that their radio station has a manual frequency hopping function, and it is preset with up to hundreds of channels, which can quickly implement manual frequency hopping."

"And our equipment, even if it uses components imported from the United States, needs to manually adjust the frequency, and the frequency hopping speed is far inferior to the equipment of the Eighth Route Army."

"Much faster than us."

"There's a short amount of time left for us to lock down."

"However, it takes at least five or six seconds to adjust to the same channel, even if there is a preset channel schedule in advance."

"What we have to do is find each of their channels and find out how they adjust their channels."

"Gentlemen, please!"

At the end, the devil technologist suddenly bowed and pleaded.

"Hey!"

In the conference room, dozens of devil radio experts or technical soldiers bowed their heads in unison.

Time

The morale of the devil is like a rainbow.

Including Naoto Matsuzaki, they all thought that this battle was in their hands.

Also normal.

After all, all the people here at this time are the top experts in the technology of devil radio communication, and there are many top talents who have studied in the United States, Germany, and the United Kingdom.

And the device, which is also the latest research of the Empire's radio tracking equipment.

Accurately locates for enemy lurking stations.

Originally, it was to prepare, cooperate with the military, and find the location of the headquarters of the Eighth Route Army and the enemy's headquarters, but now it is just used to find the liaison equipment of the Eighth Route aircraft.

"Capture as completely as possible."

Finally, the leader of this group of devil technical experts said to Naoto Matsuzaki:

"We need their complete communications equipment."

"It is used to study their technology, find their technological weaknesses, imitate their equipment, and improve the technological level of the empire."

"And, in exchange for resources."

As a military technologist, he knew that the empire used the captured advanced weapons of the Soil Eight Road as bargaining chips to exchange the United States for financial and material commercial transactions.

"Hey!"

Although in terms of military rank, this expert is only a Nakasa, but Matsuzaki Naoto did not dare to slack off and hurriedly agreed.

···

Night.

"Take off!"

Taiyue base area.

Aerodrome.

Under the command of the airport's air officials, the five Y-5s slowly started their engines, and then flew along the runway in turn in the direction of Beiping.

Meanwhile.

A kind of base area between Taiyue and Beiping.

"Turn on the generator."

"Turn on the navigation signal."

Everywhere, the guerrilla captains, who were directly dispatched by the headquarters, turned on the communication beacons they secretly carried and unfurled the antennas.

Take into account the safety and confidentiality of navigation equipment.

The headquarters did not hand over the base areas to various localities, but the headquarters directly sent personnel to send members of the troops directly under the headquarters and members of independent regiments to be responsible for security and opening, and to maintain vigilance at all times, and to destroy the equipment as soon as there was any problem.

This is also the reason why, in the face of the crazy search of the devils, the communication navigation beacon has not been seized by the devils so far.

Of course

The struggle between the two sides around the navigation beacon, although small in scale and little known, has a cruelty and bloodshed that is not inferior to the frontal battlefield.

···

"According to the time, the transport plane has already taken off."

Half an hour later.

Northern Review.

Wen Sheng turned on his watch, looked at the time, and said.

Then, he looked at several familiar underground party comrades on the side and couldn't help but smile.

Although the devils are crazy to suppress,

But as the saying goes, it's not the same as it used to be.

The abundant funds are far more helpful to those of them who are lurking in the rear than the front-line troops, not to mention the three cunning rabbits, they can even be cunning rabbits.

Identities can be varied and can be changed at will.

As long as you are willing to spend silver dollars, you can even forge dozens of identities in a day, and a piece of information can even go through more than a dozen transmissions.

Even, you can buy the help of the devil's insiders.

It is precisely because of these reasons that the intelligence force of the Beijing Review has not weakened, but has even been greatly enhanced, and from May to now, for more than four months, not a single core member has been caught by the devils.

This was unimaginable before.

"Open the navigation beacon!"

Wen Sheng ordered.

"Yes!

Some comrades immediately went to carry it out.

After all, this is the base camp of the North China Front Army of the devils, and there should still be vigilance, and the navigation beacon for the transport aircraft is located near the landing point in the suburbs, far away from the inner city of Beiping.

"Are you ready for today's landing site?"

Wen Sheng then continued to ask.

It's not like at the beginning, the devil didn't know that the army had planes to transport supplies, and now the devil is staring very closely.

Fortunately, there are three holes in the cunning rabbit.

Each time, four or five landing sites are prepared.

"Ready."

Some comrades immediately replied.

"Turn on the communication station."

In the end, Wen Sheng personally opened the latest second-generation communication radio sent by the headquarters - compared with the first generation, the size is much smaller, and the battery is more durable.

And according to the orders of the superiors.

Two months later, the second generation of navigation beacons with fast auto-modulation will also replace the first generation of navigation beacons.

When the time comes, the devil won't want to track the signal.

···

"Target signals are found."

"It should be the enemy's aircraft navigation signal."

A few minutes later.

In the telecommunications technology room of the devil, a devil with headphones looked at the waveform on the black and white screen and shouted loudly.

"Found a navigation signal?"

Naoto Matsuzaki was overjoyed.

Although the conflict between him and Suzuki Fanji was partly due to the fear that after the Tsubachi Road obtained those foreign materials, machinery and equipment, its strength would increase dramatically, which would harm the interests of the locusts army.

But at the end of the day, he was seriously a gain for Suzuki Fanji.

Not only did he get a lot of money for the empire, but he also made a lot of money himself, and even promoted to major general.

And is a major general with real power.

"Can you track the location of the location signal?"

Naoto Matsuzaki immediately asked.

He looked expectantly.

It is worthy of the latest advanced radio detection equipment in the Empire, and it is worthy of being the top telecommunications personnel in the Empire.

Not long after he arrived, he found the enemy's signal.

"Start locking, positioning."

The head of the devil technology in charge of the command, the rank of Nakasa, repeated Naoto Matsuzaki's orders.

"Hey, starting locking."

Dozens of devil technicians began to operate in front of this huge machine, tick-tock.

"Lock failed."

"Lock failed."

“···”

But in the face of Naoto Matsuzaki's expectant gaze, the devil technicians, these so-called top technical experts, spit out a sentence of locking failure.

"What's going on?"

Naoto Matsuzaki didn't understand.

Why, all the enemy signals have been discovered, and the position cannot be locked?

Back then, it was not so difficult for the First Army to lock the position of the Tubalu Headquarters.

No one answered Naoto Matsuzaki's doubts, or rather, even these technologists didn't understand why the lockdown had failed.

It wasn't until more than half an hour later that the person in charge at the Nakasa level answered Naoto Matsuzaki's doubts:

"Hey..."

I saw this person sigh first, and then said:

"Their navigation signal is discontinuous, and it always fluctuates rapidly between nearly 100 frequencies, and the beating frequency is extremely fast, and we can't lock it for the time being."

The technical person in charge of the devil used it for the time being.

But this one for the time being, the tone bites hard.

"This..."

Naoto Matsuzaki didn't understand, but he was shocked.

"But..."

"How is this done?"

"How?"

The person in charge of the devil technology at the Nakazo level began to mumble to himself:

"How did they do it?"

Obviously, things were more than he could have imagined.

"What?"

Naoto Matsuzaki didn't understand.

"Theoretically, although the continuous and rapid fluctuations between nearly 100 frequencies can interfere with our locking, it is not difficult, just take a little more time."

"But..."

"Their navigation signal is a fast-fluctuating and discontinuous signal!"

"How is this possible?"

"What's wrong with a fast fluctuating and discontinuous signal?"

Naoto Matsuzaki, who didn't know much about technology, continued to ask.

"Theoretically, it's not difficult to achieve it, just turn the machine on and off quickly, or quickly adjust the current size to make the power change sharply."

"But this is extremely demanding on the components, which have to withstand repeated high currents."

"How do they make sure that the tubes don't burn out?"

The leader of the devil technical expert explained as if talking to himself.

"That is."

"Their navigation equipment, their components are very advanced?"

Naoto Matsuzaki got to the point.

This is something that Naoto Matsuzaki can understand.

Just like the Arisaka rifle cartridge of the Eighth Route Army, because of the material and manufacturing process, it is very lubricated, and the machine gun of the empire can be used without even brushing the oil.

The probability of getting stuck is much, much lower.

There are also earth-eight artillery, lighter but harder barrels, more propellants, higher chamber pressures, harder shells, and more powerful explosives at the same weight.

"Yes."

The leader of the devil technology seemed to have finally accepted the reality, he nodded, and said:

"Very advanced."

"It can be continuously turned on and off, and the power peak changes so huge and fast, and its manufacturing technology is beyond our theoretical system." (End of chapter)