Icom IC-R8500 - Page 17

MAIN
unit, IC18
Pin
number
Port
name
Description
4
WFM
Outputs
WFM mode select signal.
5
FM
Outputs
FM
mode select signal.
6
/WFM
Outputs non-WFM
mode select signal.
7 SSB
Outputs
SSB
mode select
signal.
11 FIL3
Outputs 15 kHz bandpass filter select
signal.
12
FIL2
Outputs
6
KHz bandpass filter
select
signal.
13
Fill
Outputs 2.4 kHz bandpass filter select
signal.
14 AM
Outputs AM mode select signal.
PLL unit, IC1
Pin
number
Port
name
Description
11
RST
:
Outputs reset signal.
PLL
unit, IC2
Pin
number
Port
name
Description
4
STRB
Outputs strobe signal tor the expander
IC(ICI).
11 STDB
Outputs strobe signal tor the BFO
circuit
(IC13).
12
STP2
Outputs
strobe signal for the
2nd LO
PLL 1C
(tCiO).
13 STDA
Outputs strobe signal for
the 1st LO
PLL circuit (IC3).
14 STPI
Outputs strobe signal
for
the
1 st LO
PLL
1C (ICS).
RF-A unit. IC3
Pin
number
Port
name
Description
4 B1
Outputs 0.1 to 0.49999 MHz bandpass
filter
select signal.
5 B2
Outputs 0.5 to 1.59999 MHz bandpass
filler select signal.
6 B3
Outputs 1.6 to 1.99999 MHz bandpass
filter
select signal.
7 B4
Outputs 2.0 to 3.99999 MHz bandpass
filter select signal.
11 B5
Outputs 4.0 to 7.99999 MHz bandpass
filter select signal.
12 B6
Outputs 8.0 to 10.99999 MHz
bandpass filter select signal.
13 B7
Outputs
1 1
.0
to
1
4.99999
MHz
bandpass filter select signal.
14 B8
Outputs 15.0 to 21 .99999 MHz
bandpass
filter
select signal.
RF-A
unit, IC4
Pin
number
Port
name
Description
4 ANSW Outputs
[ANT2]
select signal.
5
AT20
Outputs 20 dB attenuator control
signal.
6
B9
Outputs 22.0 to 29.99999 MHz
bandpass
filter select
signal.
7
PREF
Outputs 1 0 dB
attenuator
control
signal.
“High":
While
[10
dB] Is ON.
13 HF5
Outputs HF5
V regulator circuit control
signal.
14
PREO
Outputs 1
0
dB attenuator control
signal.
•‘High": White
[10
dB] is OFF.
CONV unit, IC10
Pin
number
Port
name
Description
4 ICON
Outputs switching relay control signal.
"High":
While
RF signals
above
1025 MHz are received.
5
5MON
Outputs
divider
circuit (IC8) and LPF
(L43-L45) control signal.
"High"; While
1025-1199.99999
MHz signals
are received.
6
5MOF
Outputs
divider
circuit (IC8) and
LPF
(L47-L49) control signal.
"High": While RF signals above
1200
MHz are received.
7 2ATF
Outputs
20
dB attenuator
control
signal.
"High"
:
While
(20
dB) is OFF.
12 2ATN
Outputs 20 dB attenuator control
signal.
"High": While
[20
dB] is ON.
13 1ATF
Outputs 10 dB attenuator control
signal.
"High":
White
(10
dB] is
OFF.
14
1ATN
Outputs
10
dB attenuator
control
signal.
"High": While
(10
dB) is ON.
4-10