- Product Name: Tecsun / Desheng PL-380
- Color: Silver dark gray black silver [USB charging head + USB cable + 3 rechargeable batteries] (rechargeable) black [USB charging head + USB cable + 3 rechargeable batteries] (rechargeable) gray + USB [USB charging head line +3 rechargeable battery] (rechargeable)
- Radio Tuner: Digital tuner
- Band type: Full-Band
- Channel: 2
- Battery: 5
- Radio Type: Pocket
- Time to market: 2009
- 2009 listed Month: December 2009
- Weight: 200 grams (without batteries)
- Size: Width 135 × height 86 × thickness 26 (mm)
- Service: Genius
- Brand: Tecsun / Desheng
- Desheng radio brand: PL-380
Examination Package Summary: college entrance exam can be used
Tecsun / Tecsun PL-380 full-band campus radio semiconductor entrance Radio forty-six English
Commodity prices: ￥240
With a price: ￥210.00
Commodity prices: ￥168
With a price: ￥138.00
With more favorable purchase
Package price: ￥343.00
Examination Package 1 Summary: college entrance exam can be used
Tecsun / Tecsun PL-380 full-band campus radio semiconductor entrance hearing the radio with headset
Commodity prices: ￥240
With a price: ￥210.00
Commodity prices: ￥69
With a price: ￥55.00
With more favorable purchase
Package price: ￥260.00
Pro factory there with the machine itself headset Oh, so the exam can be used directly, without additional purchase headphones oh.
PL-380 full-band digital demodulator Stereo Radio
Desheng PL-380 is the company DSP digital demodulation technology-based, multi-purpose, full-band digital tuning Radio and easy to operate. It applies Desheng development of ETM (Easy Tuning Mode) tuning mode, which greatly improves the listening to the radio convenience of hope this lightweight radio to help you enjoy the broadcast, to bring you joy.
Choose colors: black, silver, silver
Products and Accessories
● This machine adopts SILICON LABS si4734 digital signal processing (DSP) chip, the analog FM / AM radio signal digitizer, and the use of modern software radio processing and demodulation principle, to improve the listening sensitivity, selectivity, and SNR anti-jamming capability
● can receive FM stereo, AM, long wave, short wave (2.3 - 21.95MHz) radio programs, practical multi-function, easy to operate
● FM wide receive frequency range (64 - 108MHz), part of the campus radio and containing 2--5 channel TV sound program
● seven kinds of selection methods: easy tuning (ETM), a manual search radio frequency (VF), manual search stored radio (VM), direct input frequency of the digital radio station or directly enter the address stored digital, radio frequency automatic search browse, browse automatically search radio has been stored, where ETM is closing station Desheng method for improving the efficiency of invasive income units
● can be manual, semi-automatic (ATS) to store up to 550 radio frequencies: FM / AM / long wave stations each can store 100, shortwave station 250 can be saved
● Multi-function display: to display the radio frequency, signal strength / noise ratio, temperature, battery charge and other information
● 30-stage rotary electronic volume control
● using a special high-sensitivity film speakers, awesome; use headphones to listen to FM stereo radio
● with broadcast alarm sound / beep alarm sound, you can listen to radio timing turn stored in advance, and set 1 - Automatic shutdown in 90 minutes
● Smart Power switch function: You can set the boot 1--120 minutes after the automatic shutdown can also cancel the automatic shutdown
● The machine is energy saving, section 3 R6 (the 5th) battery-powered; you can also use nickel-metal hydride battery-powered (optionally available), and using the machine's USB jack for external power intelligent charging
● Accessories: Cover and stereo headphones
PL-380 basic technical indicators:
● Frequency Range / Tuning step
- Frequency Modulation (FM)
64 - 108 MHz; Intelligent Stepper 0.01 / 0.1 MHz
You can choose the frequency coverage:
Standard: 87 - 108 MHz (standard applicable to all other countries except Japan, Germany, Russia)
Germany: 87.5 - 108 MHz
Japan: 76 - 108 MHz
Russia: 64 - 108 MHz (including part of the campus radio and domestic 2--5 channel TV sound)
- Short-wave (SW)
2300 - 21950 kHz; intelligent stepper 1/5 kHz
- Medium wave (MW)
522 - 1620 kHz; Intelligent Stepper 1/9 kHz (for Asia, Africa and Europe)
520 - 1710 kHz; Intelligent Stepper 1/10 kHz (for North America)
- Long Wave (LW)
153 - 513 kHz; intelligent stepper 1/9 kHz
● Noise limit sensitivity:
Frequency Modulation (FM) (S / N = 30dB) better than 3 uV
Medium-wave (MW) (S / N = 26dB) better than 1 mV / m
Long Wave (LW) (S / N = 26dB) better than 10 mV / m
Short wave (SW) (S / N = 26dB) better than 20 uV
Frequency Modulation (FM)> 60 dB
Medium-wave (MW)> 60 dB
Long Wave (LW)> 60 dB
Short-wave (SW)> 60 dB
● FM stereo separation: better than 35 dB
● Output Power:
Speaker: 250 mW
Headphones: 10 mW / 8 - 32 ohm stereo headphones
● Storage Memory Number: Total 550
Frequency Modulation (FM) 100 Ge
Medium-wave (MW) 100 Ge
Long Wave (LW) 100 Ge
Short-wave (SW) 250 Ge
● awakened mode: Radio alarm sound / buzzer alarm sound
● Quiescent Current:
Frequency Modulation (FM) < 25mA
AM / long wave (MW / LW) < 23mA
Short-wave (SW) < 27mA
Standby Shutdown< 90uA
● Speaker Specifications: 50 mm diameter / 16Ω speaker film
● Power supply:
Battery-powered: Section 3 R6 (AA) batteries or rechargeable batteries
External power jack: USB specification / DC 5V 300mA
● Weight: about 200g (without batteries)
● Physical Size: Width 135 × height 86 × thickness 26 (mm)
Stereo headphones, protective cover, external FM / SW antenna, manual, certificate, service assurance, service tracking survey
ETM: Easy Tuning Mode convenient tuning mode
ETM tuning methods ---- use radio reception circuit and MCU control software, does not preclude the radio frequencies, preferably a radio frequency suspected, so that users can easily find out later want to listen to radio programs.
As we all know, the frequency interval civilian radio and radio frequency range is usually:
FM: Frequency range 87 - 108 MHz frequency spacing 0.1 MHz
MW: frequency range 522 - 1620 kHz frequency spacing 9 kHz
HF: Frequency range 1700 - 30000 kHz frequency interval 5 kHz
In theory, each band radio frequency tolerance for points as follows:
FM 87-- 108 MHz radio frequency can accommodate as (108-87) ÷ 0.1 = 210 Ge
AM 522-- Radio frequency 1620 kHz can accommodate as (1620-522) ÷ 9 = 122 Ge
HF 1700 - 30000 kHz radio frequency that can be accommodated as (30000-1700) ÷ 5 = 5660 Ge
[PL-380 frequency shortwave receiver is (21950 -2300) ÷ 5 = 3930 Ge]
Digital radio tuner, are in accordance with the above provisions designed reception range and frequency step interval. Radio with digital tuning search for radio stations, from low to high frequencies, 210 FM frequency to search, to search for 122 MW frequency point, to search thousands of shortwave frequencies.
But in fact, based on the prevention of adjacent channel interference and many other reasons, not everyone has a radio frequency such as listen to FM radio in different locations, ranging received several radio broadcasts as many as received 60-- 70 radio another example MW due to signal transmission, distribution of the number of stations is less during the day and more at night, you can receive a few - dozens of radio stations.
Then to PL-380 shortwave receiver as an example:
There are short wavelength (21950-2300) ÷ 5 = 3930 frequency points, and can actually listen to the radio during the day dozens, hundreds of evening and early in the evening radio frequency distribution is almost different. Suppose radio receive to only 200 radio programs, then in order to be found to these 200 stations, you have to search for frequencies close to 4000 points, and search again takes a long time.
In response to these problems, German Health developed ETM tuning methods, the use of radio reception circuit and MCU control software, does not preclude radio frequency, preferably a suspected radio frequency (eg different countries, various languages of the program, also including interference signal local electromagnetic environment) That is, the method can be used ETM tuning frequency is preferably from thousands of dozens - hundreds of suspected frequency, a user in the future income units in operation, it is easy from suspected frequency of these preferred out, find you want to listen to radio programs.
ETM tuning with convenient way to listen to the radio frequency to search for the user can be reduced to:
Several FM - dozens of day and night is basically the same
Several Polish - dozens of less daytime, nocturnal
Shortwave dozens - hundreds of frequencies less during the day, the night less evening more and different time periods, stations distributed in different frequency ranges.
ETM method of operation and the function of the difference between the ATS:
Use ETM function
Use ETM function, first press the key ETM, where the band performed on the full frequency search, preferably a radio frequency suspected preferably after, you can use the tuning knob to operate the transfer station.
Special Note: at different times, different places, different bands, the number and frequency of suspected distribution of radio is not the same, especially in the short wave band.
In the same place with the ETM method of listening to the radio:
FM band: once during the day as long as the ETM preferably on the line, this will not do, but every time ETM preferred frequency for a place to listen to, it is recommended to re-do a ETM..
The wave band: more stations in the evening, but for once the preferred ETM listening site, proposed to re-do a ETM..
Shortwave bands: high with ETM convenient method of listening to shortwave broadcasts extent practical at different times to listen to shortwave broadcast ETM mode, it is recommended to conduct ETM preferred.
In order to avoid too much clutter to the search signal, we recommend you to open an outdoor balcony or performed ETM preferable.
With the ETM tuning method, you will feel listening to the radio turned out to be so easy, so fast.
ETM and ATS What is the difference?
ETM and ATS on the search / memory frequencies of the basic principle is the same.
Signal strength threshold ATS search radio set relatively high in order to minimize non-locking frequency of the station is too weak without listening to the radio frequency value. The frequency to search the reservoir to be automatically stored in the memory editing, and afterwards you are free remove and increasing radio frequency finishing stored radio frequency, you can very easily from the reservoir to bring up that you want to listen to the radio frequency. Precisely because of this, I believe you are not willing to be free to ATS operations overwrite You worked hard to edit and tidied radio frequency.
ETM is based on easy tuning and adjustment of frequency, with a lower threshold of locking search, it is certainly not to exclude those who do not even have a frequency noise radio for the purpose of this model can be locked weaker radio signals suspected, done ETM preferred frequency and then to listen to the radio, you can not only save operating time, but also can improve the life of the tuning knob, tune because ETM convenient method does not provide editing functions, you can always, the ETM hesitate to operate again search for suspected radio frequency.
Hint: in good listening environment, frequency and number of stations ETM ATS searched as possible, especially the FM band, I will not lose anything by ETM, although you can try.