Icom IC-R8600 Instruction Manual - Page 35
AFC function, Receiving in the CW mode, Setting the CW pitch control, About the CW Reverse mode
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5 OTHER FUNCTIONS AFC function Receiving FSK (RTTY) signal FM, WFM and DIGITAL modes The AFC (Automatic Frequency Control) function tunes the receive frequency into the incoming signal. LThis function activates regardless of the squelch condition. LIn the WFM mode, the receive frequency may not tune to the center frequency. 1. Push . 2. Touch [AFC]. ••Each touch turns the AFC function ON or OFF. 3. To close the MENU screen, push . Receiving in the CW mode DDSetting the CW pitch control You can set the received CW audio pitch and the CW side tone without changing the operating frequency. 1. Push . 2. Touch [CW PITCH]. 3. Rotate to adjust the pitch. ••Settable range: 300 ~ 900 Hz DDAbout the CW Reverse mode The CW-R (CW Reverse) mode reverses the receive Beat Frequency Oscillator (BFO). Use when interfering signals are near the desired signal and you want to reduce interference. CW mode (LSB side) CW-R mode (USB side) BFO Interference Desired signal BFO Interference Desired signal DDDecoded FSK data display The IC-R8600 decodes FSK signals with a built-in decoder. The decoded characters are displayed on the FSK DECODE screen. zzOpen the FSK DECODE screen in the FSK mode. MENU » DECODE Tuning indicator Decoding baud rate FFT scope When tuned into an FSK signal, the decoded characters are displayed here. DDDecoding FSK signal 1. Set the Mark frequency and Shift width on the FUNCTION screen. (p. 5-7) 2. Rotate to adjust the waveform on the FFT scope screen. LLInformatio ••Aim for a symmetrical wave form, and be sure the peak points align with the mark and shift frequency lines on the FFT scope screen. ••The S-meter displays the received signal strength, when a signal is received. ••If you cannot decode correctly, try the FSK-R (Reverse) mode. ••Tune to where both "◄" and "►" are displayed in the tuning indicator. ••The Mark and Shift frequency differ, depending on the frequency band. FSK Normal mode 1615 Hz 170 Hz FSK-R mode 170 Hz 1615 Hz BFO Mark Space Space Mark BFO Displayed frequency Displayed frequency LOn the amateur radio band, set the Mark frequency to 2125 Hz and the shift frequency to 170 Hz in the FSK-R mode. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 TIP: Reversing the carrier point The carrier point of the CW mode is LSB by default. You can change it to USB in the "CW Normal Side" item of the OTHERS set screen. (p. 11-3) MENU » SET > Function > CW Normal Side 5-5