Chapter 758 Distress Signal?

What's going on with this buzzing sound? !

Qi Lin's first reaction was that there was something wrong with the radio, but after he opened the casing of the radio and inspected it carefully, he found no problem.

There are no radio stations in the wasteland at this moment. The radio should not be able to receive any signals. Even if it is some messy electromagnetic waves, it should never make such a loud buzzing sound!

Qi Lin's eyes stayed on the FM frequency of the radio - FM103.7.

This frequency is incompatible with any radio station in the old era. If you had tuned your radio to this channel before the war, you would have heard a bunch of electric noise. But at this moment, the expression on Qi Lin's face had frozen. Already...

The internal communication channel of Thunder Falcon Team... happens to be 103.7!

Although they don't use this kind of short-wave communication, the encoding of the channels is exactly the same.

"...Is it a coincidence?"

Qi Lin took a deep breath and then connected the power supply to the radio again.

The harsh buzzing sound exploded in the room like thunder. Qi Lin had the urge to cover his ears, but he still listened to all the buzzing sounds.

The more he listened, the weird look on Qi Lin's face became more intense. Unknowingly, he had accelerated the speed of the energy-gathering vortex to 3,500 rpm...

After a while, Qi Lin unplugged the power supply.

To others, this might be just an unbearable harsh noise, but Qi Lin heard something different in this buzz.

The frequency of the buzzer is very high, but it is not fixed. It keeps repeating several frequencies at high speed. If you don't listen carefully, you can't hear the changes in frequency at all.

But just hearing it, let alone analyzing it with your ears, is enough to give you a splitting headache.

Even Qi Lin could barely distinguish the change in frequency with the help of the overload power of the energy-gathering vortex.

This is a string of Morse code, repeating three English letters.

"S.O.S."

International distress signal.

Is it Cheng Yanqiu? A distress signal sent by Cheng Yanqiu?

Such an idea popped into Qi Lin's mind, but he quickly dismissed it.

The communication distance of shortwave FM is very short, and it is very easy to be intercepted and deciphered. Members of the Thunder Falcon Team will never send a distress signal in this way.

And the most important point - although "SOS" is an international distress signal, the distress signal used internally by the Thunder Falcon Team is another string of encrypted thirty-two characters. Without memorizing the code book, it is It is absolutely impossible to understand the content contained in this string of characters.

Then who sent this distress signal...?

Could it be another dispatch team? But as far as Qi Lin knows, the Thunder Falcon Team has not been assigned any missions recently. Even those secret missions that will not be archived can be checked with Qi Lin's authority after joining the Shadow Force - at least he can be sure that in He is the only member of the organization near the ruins of LS City.

And even other dispatch teams will not use the three characters SOS as a distress signal.

Unorganized dispatch team? That would be even more impossible. Even if they were forced to use FM radio to transmit, they would not "bump" into the Thunder Falcon Team's dedicated channel by chance.

"Am I already exposed?"

Qi Lin is the only person around the ruins of LS City who knows the dedicated channel of Thunder Falcon Team. Obviously, the target of this rescue model is Qi Lin.

Generally speaking, the maximum reception distance of FM radio is about 150 kilometers to 200 kilometers, and the signal of this buzzer is so strong, the distance must be closer.

Qi Lin opened the map and drew a circle with his location as the center and a radius of 100 kilometers on the scale. The source of the unknown distress signal should be within this circle.

As soon as the circle was drawn, Qi Lin couldn't help but frowned.

This circle...more than three-quarters of the area is within the ruins of LS City.

Qi Lin suddenly felt that this distress signal was probably a trap.

In the equally classic movie "Alien", the protagonist and others received a "distress signal" from an unknown source, which led to a series of horrific events.

Could it be a signal from the mastermind?

But... if the mastermind has already discovered his traces, why bother to just send biochemical monsters to surround and suppress him? Or he can simply wait until he gets deep into the ruins of the city to launch the attack. Anyway, his original purpose is to enter the ruins. Yes, why do you have to play like this at this time?

Aren't you afraid that this "distress signal" will have the opposite effect of alerting others?

Qi Lin believed that with the master brain's IQ and computing power, he would never do such a thing.

…

Qi Lin tried to change to other frequencies, but all was silent. Only when the frequency was adjusted to FM103.7 could the harsh buzzing sound be heard, and the Morse code hidden in the buzzing sound was The content has never been changed.

"Three points, three lengths, three points" corresponds to S, O, S in the English letters.

However, this signal may not come from the ruins of LS City. As for how to determine the direction, Qi Lin thought of a way.

He found a package of compressed dry food, and then took out the food inside, leaving only the outer packaging bag.

The packaging bag is made of plastic film and aluminum foil. As we all know, aluminum foil can block electromagnetic signals and is an ideal shielding material.

Qi Lin folded the aluminum foil packaging bag slightly, then covered the antenna of the radio, leaving only a "window", and then slowly turned the simple "shielding cover" in a circle.

He soon discovered that when the window of the shield was pointed in the direction of the city ruins, the signal was the strongest, and when it was turned to other directions, the signal would be somewhat interfered with.

"Sure enough... the signal source is among the ruins..."

Qi Lin repeated the test twice more. Now, he can basically confirm that the source of sending this "distress signal" is in the ruins of the city.

And... it is the heart of the ruins of the city.

Although his heart was full of ominous premonitions, Qi Lin did not flinch. He put the radio back to its original place and began to move towards the interior of the ruins of the city.

From inside a dead city that was completely silent, an international distress signal came. This has to be said to be a very strange thing. Moreover, this distress signal was hidden in an extremely harsh buzzer... This It seems to be covering up something... But, why is it covering up?