Ats-20 Radio Manual [extra Quality] May 2026

ATS-20 Radio Manual — Focused Exposition

Switching Bands

Use the Band- and Band+ buttons.

• FM: 64 MHz – 108 MHz (Region dependent).
• LW: 148 kHz – 500 kHz (Long Wave - rare reception).
• MW: 522 kHz – 1620 kHz (AM Broadcast).
• SW: 1.7 MHz – 30 MHz (Shortwave).
• AIR: 118 MHz – 137 MHz (Aviation/AM).

Chapter 7: Advanced Settings Menu (The Factory Hidden Menu)

Yes, there is a secret engineering menu that no printed ATS-20 radio manual includes. ats-20 radio manual

How to access:

1. Turn the radio OFF.
2. Press and hold the Volume/Squelch button.
3. While holding it, press and hold the Power button until the screen lights up.
4. Release both buttons.

What you can adjust here:

• Threshold: Adjusts the S-meter baseline.
• AM Refer: AM reference level (usually 60 dBuV).
• FM Refer: FM reference level.
• SSB Refer: Fine-tunes the BFO (Beat Frequency Oscillator) for zero-beat SSB tuning. If all SSB sounds high-pitched, adjust this by ±50 Hz.

Exit: Turn the radio off and on again.

9. Specifications (Typical)

• Chip: Si4732 (DSP) – excellent sensitivity
• Frequency range: 153 kHz – 26100 kHz (SW continuous) + 64–108 MHz
• Modes: AM (MW/SW/LW), WFM (FM broadcast)
• Output: 1W speaker, 3.5mm stereo headphone jack
• Size: ~4.5 x 2.5 x 1.2 inches