Icom IC-7410 Instruction Manual - Page 9

1 PANEL DESCRIPTION !0 R F GAIN CONTROL/SQUELCH CONTROL [RF/SQL] (outer control; p. 32) Rotate to adjust the RF gain and squelch threshold level. The squelch removes noise output to the speaker when no signal is received (closed condition). • The squelch is particularly effective in FM, but also works in other modes. • T he 12 to 1 o'clock position is recommended for the most effective use of the [RF/SQL] control. • [RF/SQL] operates as only an RF gain control in SSB, CW and RTTY (Squelch is fixed open), or a squelch control in AM and FM (RF gain is fixed at maximum sensitivity), when the "RF/SQL Control" item is set to "Auto" in the Set mode. (p. 86) • When used as an RF gain/squelch control Noise squelch (FM mode) Squelch is open. Recommended level Maximum RF gain RF gain adjustable range S-meter squelch • When used as an RF gain control (Squelch is fixed open; SSB, CW and RTTY only) Adjustable range Minimum RF gain Maximum RF gain While rotating the RF gain control, a faint noise may be heard. This comes from the DSP unit and does not indicate an equipment malfunction. • When used as a squelch control (RF gain is fixed at maximum.) Noise squelch (FM mode) Noise squelch threshold (FM mode) S-meter squelch threshold Squelch is open. S-meter squelch Shallow Deep !1 MIC GAIN CONTROL [MIC] (inner control; p. 34) Rotate to adjust the microphone gain. • The transmit audio tone in the SSB, AM and FM modes can be independently adjusted in the Tone Control Set mode. (pp. 90, 91) ✔ How to set the microphone gain. While speaking at normal voice level, adjust the microphone gain so that in the SSB or AM modes, the ALC meter swings within the ALC zone. Recommended level for Icom microphones Decreases Increases !2 R F POWER CONTROL [RF PWR] (outer control; p. 34) Rotate to continuously vary the RF output power between 2 W (minimum) and 100 W (maximum). (AM: between 2 W and 27 W). !3 E LECTRONIC CW KEYER SPEED CONTROL [KEY SPEED] (p. 37) (Mode: CW) Rotate to adjust the keying speed of the internal electronic CW keyer to between 6 wpm (minimum) and 48 wpm (maximum). Slow Fast !4 B REAK IN DELAY CONTROL [BK-IN DELAY] (p. 63) (Mode: CW) Rotate to adjust the transmit-to-receive switching delay time for the Semi Break-in function. Short delay for high speed keying Long delay for slow speed keying !5 C OMPRESSOR CONTROL [COMP] (p. 64) (Mode: SSB) Rotate to adjust the compression level. Decreases Increases !6 M ONITOR GAIN CONTROL [MONI GAIN] (p. 65) Rotate adjust the monitor level for the clearest audio output. Decreases Increases 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 2