Icom IC-78 Instruction Manual - Page 23

4 OPERATION s Filter selection The filter selection switches the IF passband width as shown in the table at right. The filter selection is for temporal setting. q Select the desired mode programmed channel. (p. 13) w Push [SET] for 1 sec. to enter quick set mode. e Push [UP Y] or [Z DN] several times until "FILTER" appears on the display. r Rotate the channel selector to select desired pass- band width. • Either " " or " " does not appear while the nor- mal filter is selected. • " " appears when the wide filter is selected. • " " appears when the narrow filter is selected. t Push [SET] to exit quick set mode. • Filter construction (Rx) • Optional filter variations Name FL-52A FL-53A FL-96 FL-222 FL-257 Band width 500 Hz/-6dB 250 Hz/-6dB 2.8 KHz/-6dB 1.8 KHz/-6dB 3.3 KHz/-6dB Mode CW/RTTY-N CW/RTTY-N SSB-W SSB-N SSB-W When an optional filter is installed, set the optional filter in initial set mode. An optional filter is not selected by default. Through 2nd IF signal CFWS450HT (6 kHz)*3 FL-65 (2.4 kHz)*1 FL-257 (3.3 kHz)*2 FL-96 (2.8 kHz)*2 FL-222 (1.8 kHz)*2 FL-52A (500 Hz)*2 FL-53A (250 Hz)*2 2nd IF signal/DET *1 AM; Narrow, SSB/CW/RTTY; Normal *2 OPTION *3 AM; Normal, SSB/CW/RTTY; Wide • Filter selection table no FL-52A FL-53A FL-96 FL-222 SSB WIDE 6 kHz* NORMAL 2.4 kHz NARROW - 6 kHz* 2.4 kHz 500 Hz* 6 kHz* 2.4 kHz 250 Hz* 6 kHz* 2.8 kHz 2.4 kHz - 6 kHz* 2.4 kHz 1.8 kHz* 6 kHz* WIDE 6 kHz* 6 kHz* 6 kHz* 6 kHz* 2.8 kHz CW NORMAL 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz NARROW - 500 Hz 250 Hz - 1.8 kHz RTTY WIDE 6 kHz* NORMAL 2.4 kHz NARROW - 6 kHz* 2.4 kHz 500 Hz 6 kHz* 2.4 kHz 250 Hz 6 kHz* 2.8 kHz 2.4 kHz - 6 kHz* 2.4 kHz 1.8 kHz WIDE - - - - - NORMAL 6 kHz 6 kHz 6 kHz 6 kHz 6 kHz AM 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz NARROW 2.4 kHz 500 Hz* 250 Hz* 2.8 kHz* 1.8 kHz* *Can be used when the expanded filter selection is turned on in the initial set mode. (see next page) FL-257 6 kHz* 3.3 kHz 2.4 kHz - 6 kHz* 3.3 kHz 2.4 kHz - 6 kHz* 3.3 kHz 2.4 kHz - - 6 kHz 2.4 kHz 3.3 kHz* 21