Icom IC-R75 Instruction Manual - Page 6

2 PANEL DESCRIPTION ■ Front panel Speaker Function display (p. 5) !8 !7 !6 !5 q w COMMUNICATIONS RECEIVER SSB CW/RTTY FIL AM FM TS 1 2 3 ABC DEF 4 5 6 GHI JKL MNO 7 8 9 PRS TUV WXY . 0 QZ ENT PHONES POWER AF RF/SQL TWIN PBT ANT SET CLOCK P.AMP ATT NR ANF NB AGC V/M MW CLR SEL SCAN DN UP LOCK !4 !3 !2 e r t y u io !0 !1 q POWER SWITCH [POWER] ➥ Push momentarily to turn power ON. • Turn the optional DC power supply ON in advance. ➥ Push for 2 sec. to turn power OFF. w HEADPHONE JACK [PHONES] (p. 8) Accepts headphones. • When headphones are connected, the internal speaker or connected external speaker does not function. e AF CONTROL [AF] (inner control) Varies the audio output level from the speaker. r R F GAIN/SQUELCH CONTROL [RF/SQL] (outer control; pgs. 14, 30) Adjusts the squelch threshold level. The squelch removes noise output from the speaker (closed condition) when no signal is received. • The squelch is particularly effective for FM. It is also available for other modes. • The control can be set as the squelch plus RF gain controls or squelch control only (RF gain is fixed at maximum) in set mode. t P ASSBAND TUNING CONTROLS [TWIN PBT] (p. 15) Adjust the receiver's "passband width" of the 455 kHz and 9 kHz IF filters for the inner and outer controls, respectively. • Set to the center positions when not in use. y C LOCK MODE SWITCH [CLOCK] (p. 28) Toggles between frequency indication and clock indication when pushed. u A NTENNA SELECTOR/SET MODE SWITCH [ANT/SET] (pgs. 16, 30) ➥ While in a frequency indication, enters set mode when pushed. ➥ While in a frequency indication, toggles between the antenna 1 and 2 connectors when pushed for 2 sec. ➥ While in the clock indication, enters time setting condition when pushed for 2 sec. ➥ While in a timer indication, toggles the timer ON or OFF when pushed. i TUNING DIAL Changes the displayed frequency, selects set mode items, etc. o TUNING DIAL TENSION LATCH Adjusts the tension of the tuning dial. !0 LOCK/SPEECH SWITCH [LOCK] (pgs. 13, 34) ➥ Toggles the frequency lock function ON and OFF. ➥ Announces the selected readout frequency when an optional UT-102 is installed and when pushed for 2 sec.