Icom COMMUNICATION RECEIVER IC PCR100, Руководство по обслуживанию, Страница: 13 / 41

4-4-2 OUTPUT EXPANDER IC
(1) IC1
(2) IC3
4 - 7
Outputs low-pass filter select signal.
High: When frequencies below 1.8
MHz are displayed.
Outputs bandpass filter select signal.
High: When frequencies from 1.8 to
14.999 MHz are displayed.
Outputs bandpass filter select signal.
High: When frequencies from 15.0 to
29.999 MHz are displayed.
Outputs bandpass filter select signal.
High: When frequencies from 30.0 to
49.999 MHz are displayed.
Outputs bandpass filter select signal.
High: When frequencies from 700.0
to 1300.0 MHz are displayed.
Outputs bandpass filter select signal.
High: When frequencies from 350.0
to 699.999 MHz are displayed.
Outputs bandpass filter select signal.
High: When frequencies from 150.0
to 349.999 MHz are displayed.
Outputs bandpass filter select signal.
High: When frequencies from 50.0 to
149.999 MHz are displayed.
Pin Port
Description
number name
4
5
6
7
11
12
13
14
B0C
B1C
B2C
B3C
B7C
B6C
B5C
B4C
Output 450 kHz IF filter select signals.
Output 10.7 MHz IF filter select signals.
Outputs AM mode select signals.
High: When AM mode is selected.
Outputs FM mode select signals.
High: When FM mode is selected.
Outputs WFM mode select signals.
High: When WFM mode is selected.
Pin Port
Description
number name
4–6
7, 14
11
12
13
FL1–FL3
FL4, FL5
AM5
FM
WFM
SW
signal
FL1
FL2
FL3
Bandpass
filter
FI6
FI7
By-pass
Passband
width
6 kHz
15 kHz
—
SW
signal
FL4
FL5
Bandpass
filter
FI2
FI3
Passband
width
50 kHz
230 kHz