2. Q Codes
• RST – readability – Signal Strength - Tone
• 10 – 4 – 1
3. R
• QRK What’s my signal’s readability?
• QRL Are you busy?
• QRM Are you being interfered with?
• QRN What’s your atmospherics?
• QRO Shall I increase power?
• QRP Shall I decrease power?
• QRS Shall I send slower?
• QRT Shall I break transmission?
• QRV Are you ready?
• QRX When will you call again?
• QRZ Who’s calling me?
4. S
• QSB What’s my signal strength?
• QSL Can I have a receipt?
• QSO Can you connect me with?
• QSY Shall we change over to another frequency?