On May 6, Jin and Makina were still in .

< facilities in earnest.

The hub (relay point) is <.

The first time, the < itself was moved and placed facing each other, but we have made a dedicated terminal so that we don't have to go through such a hassle.

The size of the terminal is about the size of an office desk.

The terminal was wired from the communications room through the walls and ceiling.

I thought of setting it up in the Chief Superintendent's office (......), but I decided to use one of the small conference rooms a little further away because it would have been too much work for Tomax Bartmann.

"Now we can have a as needed," he said.

"Oh, Jin-dono, Makina-dono, thank you!

It was true that the workload of the Chief Superintendent would increase in some respects, but it was thought that he would not have to make various decisions on his own, and as a result, he would have less work to do.

* * * *

"......This means we need to make our communication equipment more efficient."

<> following the >.

"Now, let's start the conceptual meeting. What is important in <> by ...... magic power?"

The meeting started with Arnold as the chairman.

"Is it still <......?　I guess."

"I agree. I'm worried about interference, too.

But range will also be an issue.

"We can't ignore the cost for practical use.

The cost cannot be ignored for practical use," and so on.

Thank you for your comments. ......I think the most technically difficult thing to do is to prevent <.

Arnold said, and everyone nodded after thinking for a moment.

"I think so. I can't think of a way out of this after thinking about it for a while.

This was Groma.

"I agree.

So, first of all, we discussed <.

"I guess that would start with understanding the nature of magic waves, wouldn't it?

"Yes, Eira is right.

Groma agrees.

"In the end, I think it's all about the wave."

"Yes."

"I think it's waves of magic moving through space, like waves moving on the surface of water."

I don't disagree with that.

"If it is a wave, then it must have a height, a wavelength, and a waveform."

"Yes, yes."

< consider how to deal with magic waves.

"Reception is the use of so-called , isn't it?"

"That's right."

In other words, what is a wave that does not resonate?

That's logical.

"Frequency ...... is a wavelength, right?"

"Like sound."

<

Taking this as a hint, the members of the <> tried to construct a theory...... but could not come to any conclusion.

"......That's all for today."

Rome was not built in a day.

Even the best of the <> could not create what they wanted in a day.

* * * *

"......, that's what I'm saying."

"I see."

The same night, Arnold was talking with Jin.

"I've been thinking about how I can teach you.

Arnold himself has not yet been able to improve the manaphone.

He could have just asked Jin to teach him, but he didn't want to do that.

"Well, ...... would start by counting the frequencies."

"I see."

Even though he could not yet make improvements, Arnold understood the concept, so he immediately understood Jin's advice.

"If we know the frequency, we can devise a way to match it to the same frequency, right?"

"That's what I mean."

"Now, how do we know the frequency ......?"

How to know the frequency without using something like a digital counter.

The easiest way would be to make the waveform visible.

One such measuring instrument in modern Japan is called an < or .

It is an instrument to electrical signals, not magic waves.

If you look at 100 volts of alternating current on a light wire with this device, you will see a beautiful sine curve of 50 or 60 volts per second on the screen with time on the horizontal axis and voltage on the vertical axis. A beautiful sine curve of 50 or 60 per second is drawn on the screen.

Should we start by building such a measuring instrument?"

"I think so. The genre of is still unexplored."

"I see, maybe Jin is right.

Arnold began to think that the first step would be to develop a measuring instrument. " he said.

"We could make a <> or something like that."

"Arnold can make it."

"I don't know.　I'll give ...... a try."

"Yeah."

Such was the conversation that took place.

"Mr. Arnold, Mr. Jin, the tea is ready."

When the conversation came to an end, Chelle brewed us a cup of hojicha tea.

It's low in caffeine, so it's good to drink at night.

"Thank you."

"Thank you, Chelle."

"You're welcome."

While sipping the tea, Arnold asked Jin.

Jin is leaving here tomorrow, right?

"That's the plan. Makina will take care of the battle golem and the giant golem.

I'll take care of the battle golems and the giant golem.

I've left Loisart alone for over a week.

Goh and Rubina are going to complain, Jin said.

"I see. Thanks for all the help ...... you've given me."

"That's okay. You're one of us."

"Yeah, thanks."

Jin and Arnold shook hands firmly.