Description
Tecsun PL-398MP Stereo Radio AM LW FM Full Band Digital Tuning DSP Dual Speakers Receiver TF Card MP3 Player send without battery
Main Feature:
● Dual-channel dual-speaker design, you can enjoy FM stereo programs without using headphones
● FM stereo, short wave (2300~21950KHz), medium wave, long wave full-band reception; FM reception frequency range is 64~108MHz, you can listen to China, Europe, America and Japan FM broadcast frequencies, and you can also listen to some campus broadcasts
● Adopt si4734 digital signal processing (DSP) chip from American SILICON LABS company to digitally convert FM/AM broadcast signals, and use modern software radio technology for processing, which greatly improves sensitivity, selectivity, signal-to-noise ratio and anti-interference ability
● Choose from 7 channel selection methods: Easy Tuning (ETM), Automatic Search and Browse Radio Frequency, Automatic Search and Browse Stored Radio, Manual Search of Radio Frequency (VF), Manual Search of Stored Radio (VM), Direct Input of Frequency Number, Enter the stored station address numbers directly. Among them, Easy Tuning (ETM) is a way of receiving channels developed by Tecsun to improve the efficiency of receiving channels.
● Intelligent jog shuttle tuning knob
● LCD display radio frequency, signal strength/signal-to-noise ratio, temperature, time, battery power and other information
● Smart/manual LCD and key backlight
● 30-level electronic volume control
● Manual/automatic shutdown (1~120 minutes)
● Radio alarm/beep wake up
● MP3 playback (SD card slot)
● Line input jack, can be used as a small active speaker
● Use 3 R6 (AA) batteries for power supply, also can use Ni-MH rechargeable batteries (can be intelligently charged through the power supply of the USB socket)
● Comes with stereo headphones, line-in audio cable, protective case
● Actual size: width 187 × height 90 × thickness 30 (mm)
PL-398MP Basic Specifications
1. Frequency range/tuning step
● Frequency Modulation (FM)
64-108MHz; intelligent stepping 0.01MHz/0.1MHz
Optional frequency coverage:
Standard: 87-108MHz (suitable for China, Europe and America)
Germany: 87.5-108MHz
Russia: 64-108MHz (also suitable for receiving most campus broadcasts in China)
Japan: 76-108MHz
● Shortwave (SW)
2300-21950KHz; intelligent step 1KHz/5KHz
● Medium wave (MW)
522-1620KHz; intelligent stepping 1KHz/9KHz (suitable for Asia, Africa and Europe)
520-1710KHz; intelligent step 1KHz/10KHz (suitable for North America)
● Long Wave (LW)
153-513KHz; intelligent step 1KHz/9KHz
2. Noise limit sensitivity:
● Frequency modulation (FM) (S/N=30dB) better than 3uV
● Short wave (SW) (S/N=26dB) better than 20uV
● Medium wave (MW) (S/N=26dB) better than 1mV/m
● Long wave (LW) (S/N=26dB) better than 10mV/m
3. Optional:
● Frequency modulation (FM)＞60dB (±150KHz)
● Short wave (SW)>60dB (BW=3KHz, ±5KHz)
● Medium wave (MW)＞60dB (BW=3KHz, ±9KHz)
● Long wave (LW)>60dB (BW=3KHz, ±9KHz)
4. FM stereo separation: better than 35dB
5. Output power (distortion 10%): ≥180mW×2
6. Number of stored memories: 550 in total
● Frequency modulation (FM) 100
● Shortwave (SW) 250
● 100 medium wave (MW)
● Long wave (LW) 100
7. Wake-up mode: radio alarm, buzzer wake-up
8. Quiescent current:
● Frequency modulation (FM)＜25mA
● Short wave (SW)＜30mA
● Medium wave/long wave (MW/LW)＜30mA
● Shutdown＜80uA
9. Speaker specifications: diameter 57mm, 8Ω, 250mW paper tray speaker × 2
10. Headphone specification: Φ3.5mm/32Ω stereo headphone
11. Power supply mode:
● Battery (sold separately): 3 R6 (No. 5) dry batteries or rechargeable batteries
● External power supply (optional): USB specification DC 5V ≥250mA
12. Actual size: about width 187 × height 90 × thickness 30 (mm)
13. Weight: about 365g (without battery)
● Dual-channel dual-speaker design, you can enjoy FM stereo programs without using headphones
● FM stereo, short wave (2300~21950KHz), medium wave, long wave full-band reception; FM reception frequency range is 64~108MHz, you can listen to China, Europe, America and Japan FM broadcast frequencies, and you can also listen to some campus broadcasts
● Adopt si4734 digital signal processing (DSP) chip from American SILICON LABS company to digitally convert FM/AM broadcast signals, and use modern software radio technology for processing, which greatly improves sensitivity, selectivity, signal-to-noise ratio and anti-interference ability
● Choose from 7 channel selection methods: Easy Tuning (ETM), Automatic Search and Browse Radio Frequency, Automatic Search and Browse Stored Radio, Manual Search of Radio Frequency (VF), Manual Search of Stored Radio (VM), Direct Input of Frequency Number, Enter the stored station address numbers directly. Among them, Easy Tuning (ETM) is a way of receiving channels developed by Tecsun to improve the efficiency of receiving channels.
● Intelligent jog shuttle tuning knob
● LCD display radio frequency, signal strength/signal-to-noise ratio, temperature, time, battery power and other information
● Smart/manual LCD and key backlight
● 30-level electronic volume control
● Manual/automatic shutdown (1~120 minutes)
● Radio alarm/beep wake up
● MP3 playback (SD card slot)
● Line input jack, can be used as a small active speaker
● Use 3 R6 (AA) batteries for power supply, also can use Ni-MH rechargeable batteries (can be intelligently charged through the power supply of the USB socket)
● Comes with stereo headphones, line-in audio cable, protective case
● Actual size: width 187 × height 90 × thickness 30 (mm)
PL-398MP Basic Specifications
1. Frequency range/tuning step
● Frequency Modulation (FM)
64-108MHz; intelligent stepping 0.01MHz/0.1MHz
Optional frequency coverage:
Standard: 87-108MHz (suitable for China, Europe and America)
Germany: 87.5-108MHz
Russia: 64-108MHz (also suitable for receiving most campus broadcasts in China)
Japan: 76-108MHz
● Shortwave (SW)
2300-21950KHz; intelligent step 1KHz/5KHz
● Medium wave (MW)
522-1620KHz; intelligent stepping 1KHz/9KHz (suitable for Asia, Africa and Europe)
520-1710KHz; intelligent step 1KHz/10KHz (suitable for North America)
● Long Wave (LW)
153-513KHz; intelligent step 1KHz/9KHz
2. Noise limit sensitivity:
● Frequency modulation (FM) (S/N=30dB) better than 3uV
● Short wave (SW) (S/N=26dB) better than 20uV
● Medium wave (MW) (S/N=26dB) better than 1mV/m
● Long wave (LW) (S/N=26dB) better than 10mV/m
3. Optional:
● Frequency modulation (FM)＞60dB (±150KHz)
● Short wave (SW)>60dB (BW=3KHz, ±5KHz)
● Medium wave (MW)＞60dB (BW=3KHz, ±9KHz)
● Long wave (LW)>60dB (BW=3KHz, ±9KHz)
4. FM stereo separation: better than 35dB
5. Output power (distortion 10%): ≥180mW×2
6. Number of stored memories: 550 in total
● Frequency modulation (FM) 100
● Shortwave (SW) 250
● 100 medium wave (MW)
● Long wave (LW) 100
7. Wake-up mode: radio alarm, buzzer wake-up
8. Quiescent current:
● Frequency modulation (FM)＜25mA
● Short wave (SW)＜30mA
● Medium wave/long wave (MW/LW)＜30mA
● Shutdown＜80uA
9. Speaker specifications: diameter 57mm, 8Ω, 250mW paper tray speaker × 2
10. Headphone specification: Φ3.5mm/32Ω stereo headphone
11. Power supply mode:
● Battery (sold separately): 3 R6 (No. 5) dry batteries or rechargeable batteries
● External power supply (optional): USB specification DC 5V ≥250mA
12. Actual size: about width 187 × height 90 × thickness 30 (mm)
13. Weight: about 365g (without battery)
A brief introduction to the ETM functionality of PL-398mp:
ETM: Easy Tuning Mode convenient tuning Mode
ETM tuning method 1-using radio receiver receiving circuit and MCU control software, the frequency points without radio programs are excluded in advance, and the frequency points of suspected radio stations are selected, so that it is easy for users to find out the radio programs to be listened to in the future.
It is well known that the frequency range of civil radio broadcasting and the frequency interval of radio stations are usually frequency modulation 87-108 MHZ and frequency interval 0.1 MHz.
Medium wave 522-1620 kHz, frequency interval 9 kHz
Short wave 1700-30000 kHz, frequency interval 5 kHzo
In theory, the frequency points of radio stations allowed in each band are as follows:
FM 87-108 MHz, capable of accommodating frequency points of (108-87) + 0.1 = 210
Medium wave 522-1620 kHz, can hold (1620-522) + 9 = 122 radio frequency points
Shortwave 1700-30000 kHz, can hold (30000-1700) + 5 = 5660 frequency points [PL-398mp shortwave reception frequency points are (21950-2300) + 5 = 3930]
Digitally tuned radios are designed to receive range and frequency step interval in accordance with the above regulations. Using a digitally tuned radio to search for radio stations, from the low end of the frequency to the high end, FM searches for 210 frequency points, medium waves search for 122 frequency points, and shortwave searches for thousands of frequency points.
But in fact, for many reasons, such as preventing temporary interference, not every frequency point has a radio broadcast. For example, if you listen to FM broadcasting in different locations, you will receive a few radio stations and 6070 radio stations; for example, due to the transmission of signals, the distribution of the number of stations is characterized by fewer days and more nights, and only a few-dozens of stations can be received.
Take the shortwave reception of PL-398mp as an example:
There are (21950 2300) + 5 = 3930 frequency points in the shortwave section, but the actual radio programs can be heard in the daytime and hundreds in the evening, and the frequency distribution of the radio stations in the morning, middle and night is almost different. Suppose the radio can receive only 200 radio programs, so in order to find the 200 radio stations, you have to search for 3930 frequency points, which will take a long time to search.
In view of the above problems, Desheng developed an ETM tuning method, using radio reception circuit and MCU control software to exclude the frequency points without radio programs in advance, and select the frequency points of suspected radio stations (such as programs in different countries and languages, including interference signals in the local electromagnetic environment). In other words, dozens of suspected frequency points can be selected from thousands of frequency points by ETM tuning method, and it is easy for users to find out the radio programs you want to listen to from these selected suspected frequency points in future reception operations.
Using ETM convenient tuning method to listen to the broadcast, the frequency of users to search can be reduced to:.
A few dozens of frequency modulation, day and night are basic-- sample
In the middle wave, there are dozens of them each, with fewer days and more nights.
Shortwave is a few hundred, less during the day, less late at night, more in the evening, and in different time periods, the radio stations are distributed in different frequency ranges.
Package included:
Tecsun PL368 Radio x 1(without battery)
– Stereo earphone x 1
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