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3: 462.6125
4: 462.6375
5: 462.6625
6: 462.6875
7: 462.7125
8: 467.5625
9: 467.5875
10: 467.6125
11: 467.6375
12: 467.6625
13: 467.6875
14: 467.7125
Attachment 2:
Instructions for using the shortwave RF channel in the top input
This machine adds an external input channel for medium wave, short wave 1 , and short wave 2 , providing users with hands-on ability
to use self-winding receiving antennas to improve the reception effect.
At the same time, the product's internal MW, SW1, already has its own adaptive tuning function, and SW2 has this function turned off
by default. (The antenna inductance needs to be within a roughly accurate range)
External loop antenna parameters open to users:
Inductance Value
2.2mH
LW antennas
How to use:
1. Turn the top switch to ON;
2. Press the "ANT-SEL" button manually and select the loop antenna icon;
Note: During the process of connecting an external antenna, static electricity often occurs, causing damage to the antenna and other
abnormalities. If such problems occur, we will not be responsible for free repairs.
(This input channel has three built-in ESD devices, but damage caused by static electricity and high-power signals cannot be absolutely
avoided)
How to use manual medium wave, SW1, and SW2 antenna tuning:
MW manual tuning range: 510-1720Khz
SW1 manual tuning range: 5-15Mhz
SW2 manual tuning range: 13-30Mhz
Medium wave use: We recommend turning off this manual tuning function at SW1 and SW2 by default. After setting the switch to the
MW position, adjust the knob on the side
Just observe the RSSI/SNR value to the highest value. The exact position of manual tuning can be judged by the sound clarity.
Shortwave use: Select the manual tuning channel through the ANT-SEL button. Turn the switch to SW1 or SW2 position, then adjust the
side knob, and observe
Just set the RSSI/SNR value to the highest value; you can also judge the exact position of manual tuning by the sound clarity.
Note: The manual antenna tuning function of shortwave 1 and shortwave 2 can improve the receiving performance to a certain extent
(but only if used correctly). If the tuning is incorrect, reception may be worse than if it were not used.
250uH
MW antennas
SW2 antenna internal adaption is turned off
by default, loop antenna can be used
GND
IN
2.4--8MHz: 7.5uH
SW1 antennas
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