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

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 Shortwave Radio.  Is it real...   Buy Tecsun PL 330 here with a discount. https://ban.ggood.vip/15kDM Fred Discount code. BG1de772 English Instructions link. https://www.tecsunradios.com.au/store... 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