The next morning, Xing Baohua was too lazy to go out for breakfast, so he called Yang Jing around 8 a.m. and got straight to the point.
"I'll ask about the price for you. When you need foreign exchange, I'll transfer it from your reserve account." The foreign exchange account that Yang Jing mentioned was set up by Zhang Taoming, and with Yang Jing's help, the matter was settled.
Yang Jing was also the head of the factory's foreign trade department, in charge of import and export matters. She could use foreign exchange to make purchases with just a word to Xing Baohua.
Of course, Xiaobomei would have to verify with Xing Baohua before using the account; the financial power was not in Yang Jing's hands.
After giving these instructions, Grandpa Li arrived, and before he could say a few words, Li Wengang also arrived.
Let Grandpa Li go to the orchestra or wander around on his own, it's fine.
I'd give him a day off today; he can't afford to worry about this anymore.
Upon arriving at the performing arts troupe, several people were already moving sound equipment and other supplies.
We need to test the wireless transmission.
Xing Baohua, in any case, is not optimistic about this technology. Low power might be very useful for short-range applications, such as wireless microphones?
"Hey! A wireless microphone? That's something I should check out! 27MHz is fine! Stable transmission, low power consumption, and no need to worry about interference within a room of ten meters. It probably won't even go beyond the walls before the signal drops off."
Xing Baohua was delighted. Li Wengang had given him a new project—small investment, big profit. It didn't require much technology and was much more reliable than the reversing radar he'd wanted to develop.
Those busy people, like orderly soldiers, set up the speaker in place, and Li Wengang personally plugged in the power.
Xing Baohua helped plug in the amplifier and then connected a tape recorder. He pressed play, and sound came from the speaker on the other end.
It originally had noise reduction added, but probably due to the transmission distance, there's a slight crackling sound.
This is a problem caused by the modified radio; it's somewhat unstable and has a bit of a station-searching feel to it.
It's better if we reduce the distance further, but it still causes some interference.
At first glance, it seems to be quite successful.
Li Wengang came over and said to Xing Baohua with a smile, "Your skill is not bad!"
"Don't flatter me, really. I'm not optimistic about analog transmission. If conditions allow, let's stick with digital! The disadvantage of digital is that the distance is short, but it won't have issues like frequency crosstalk or leakage."
"Didn't you say it was difficult? And that you had to drive the whole system and all that?"
“I misunderstood. I thought you meant to achieve lossless transmission. First of all, lossless is one thing, and transmission is another. Lossless is difficult. Without twenty or thirty years of foundational knowledge or accumulated technology, you can't achieve lossless audio. It's too difficult. The key is the equipment.”
Xing Baohua explained that even before he wore it, he could only get close to it, not completely wireless and lossless.
Then he said to Li Wengang, "Transmission is not necessary. As long as there is a digital chip, it can be handled."
Just then, a burst of chaotic noise suddenly came from the loudspeaker. A high-pitched, buzzing sound.
Xing Baohua quickly turned down the volume, and after a while, he played a little sound again, gradually adjusting the volume.
This thing doesn't have a frequency band knob; the frequencies are all fixed.
They can only passively receive information.
Xing Baohua had a premonition that he had connected to a certain wireless network. Now he couldn't avoid it and could only wait for the other party to adjust its frequency.
Sure enough, after a while, a jumble of noises came from the loudspeaker, and then human voices could be heard intermittently.
"Dong San, Dong San, are you listening to music? Turn it off, turn it off."
Upon hearing the sound, Xing Baohua quickly went to turn off the tape recorder.
The loudspeaker blared again: "No! No!"
"Who's playing this? Don't let me find out." This sentence was spoken intermittently. Although Xing Baohua turned off the recorder, the wireless receiver was still on, and everyone found it very funny that this sentence was played out.
Li Wengang, rubbing his forehead, asked Xing Baohua, "Do you have any good ideas?"
"Yes, it's encrypted!" Xing Baohua said with a wry smile.
This increases the cost, and it's not something that can be done with just two radios; it requires more spare parts.
Such a small size requires integrated circuit (IC) chips; if this primitive and rough style is maintained, the size will become larger.
Of course, these people wouldn't mind the size; as long as someone can carry it, it's fine. If one person can't lift it, two people will. There's no shortage of people.
Li Wengang knew that the experiment was both a success and a failure.
He was directing people to dismantle the equipment and put it back when the gatekeeper ran over and told Li Wengang that someone was looking for Xing Baohua.
When Xing Baohua arrived at the gate, he saw Grandpa Li riding his bicycle over.
He hurriedly asked, "What happened that made you come all this way?"
"Lu Zhong called and asked you to come back."
"Who called? How did you answer?" Xing Baohua asked curiously.
"Old Wang didn't know you were here. He went to the guesthouse to look for you, but the receptionist told him. I went to his place from the symphony orchestra and mentioned this. So I ran here. Old Wang said, 'Lu Zhong is in a hurry. He wants you to come back quickly.'" Old Li was still slightly out of breath when he said this.
Xing Baohua thought to himself, "Should I return the call immediately, or return in person immediately?"
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