TECSUN PL - 330 SW Radio Three additional hidden / secret features.

TECSUN PL - 330 Shortwave SSB Radio. Thanks to your comments ive found 3 extra hidden features on the radio. I need your help understanding one of them though. Radio Review vid here. • Tecsun PL-330 Shortwav... Buy Tecsun PL 330 here with a discount. ban.ggood.vip/... Fred Discount code. BG1de772 English Instructions link. www.tecsunradi...
Tecsun PL-330 Portable Radio Full-Band Radio FM MW SW LW SSB DSP Multi-functional Radio
Specification:
1.Frequency range
FM : ( 87 - 108 MHz ) Russian: 64-108MHz Japan: 76-108MHz EU,USA : 87.5-108MHz
Attention: The frequency step of FM is 100kHz,and the fine-tune step is 10kHz
LW: 153 - 513 kHz (9kHz step, fine-tune step 1kHz)
MW: 520 - 1710 kHz [10kHz step,1kHz fine-tuning step(for America)
SW: 1711 - 29999 kHz (5kHz step,1kHz fine-tuning step)
Attention: When the above band is received in SSB mode ,step 1kHz,fine-tune step 10Hz
2.Sensitivity
FM (S/N=30db):Less than 3 uV
MW (S/N=26dB):Less than 1mV/mLW (S/N=26db) :Less than 10mV /m
SW (S/N=26dB):Less than 10mV/m
3.Selectivity
FM: 60dB (±150KHz)
MW:60dB (BW=3kHz,±9KHz) LM:60dB (BW=3kHz,±9kHz)
SW:60dB (BW=3kHz,±5kHz)
4.FM Stereo crosstalk: greater than 35 dB
5.Output Distortion 10%):200mW