Icom IC-7200 Instruction Manual - Page 35

3 BASIC OPERATION ■ RF gain and Squelch The [RF/SQL] control adjusts the RF gain and squelch threshold level. The squelch stops noise output from the speaker (closed position) when no signal is received. • The 12 o'clock position is recommended for any setting of the [RF/SQL] control. • The [RF/SQL] control can be set as the RF gain control only (squelch is fixed open) or squelch control (RF gain is fixed at maximum) in the set mode (p. 75). See the table as below. MODE SSB, CW RTTY AM SET MODE SETTING AUTO SQL RF + SQL RF GAIN SQL RF GAIN + SQL SQL SQL RF GAIN + SQL ❍ Adjusting RF gain (Receive sensitivity) Normally, the [RF/SQL] control is set to the 12 o'clock position. Rotate the [RF/SQL] control to the 11 o'clock position for maximum sensitivity. • Rotate the [RF/SQL] control clockwise to increase, coun- terclockwise to decrease the receiver sensitivity. • The S-meter indicates receive sensitivity. ❍ Adjusting squelch (Removing non-signal noise) Rotate the [RF/SQL] control to the 1 o'clock position to invoke the S-meter squelch- this allows you to set the minimum signal level needed to open the squelch. • A segment appears in the S-meter to indicate the S-me- ter squelch level. MODE TS TUNER FILTER SPCH [RF/SQL] NB NR ANF METER V/M 1 1.8 A=/B 2 3.5 SPLIT 3 7 MW 4 10 M-CL 5 14 AGC 6 18 COMP271 RIT . GENE SCAN 8 24 MNF 0 50 VOX 9 28 F-INP ENT BAND P.AMP ATT M-CH/RIT SET • When functioning as RF GAIN/SQL control Squelch is open. RF gain adjustable range S-meter squelch threshold Maximum RF gain S-meter squelch • When functioning as RF GAIN control Maximum RF gain Adjustable range Minimum RF gain • When functioning as SQL control S-meter squelch threshold Squelch is open. S-meter squelch Lowest Threshold Highest Threshold ■ Meter function The transceiver has 3 transmit meter functions for your convenience. Select the desired meter from RF power (PO), ALC and SWR. MODE TS TUNER FILTER SPCH NB NR ANF METER V/M 1 1.8 A=/B 2 3.5 SPLIT 3 7 MW 4 10 M-CL 5 14 AGC 6 18 COMP271 RIT . GENE SCAN 8 24 MNF 0 50 VOX 9 28 F-INP ENT BAND P.AMP ATT M-CH/RIT SET ➥ P ush and hold ANF METER for 1 sec. to toggle between RF power (PO), SWR and ALC. • The display indication changes as the following table. DISPLAY INDICATION MEASUREMENT PO Indicates the relative RF output power. SWR Indicates the SWR on the transmission line. Indicates the ALC level. When the meter movement shows the input signal level ALC exceeds the allowable level, the ALC limits the RF power. In such cases, reduce the MIC gain setting (see p. 31) in the quick set mode. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 30