Icom IC-FR3000 Series Sales Handbook - page 15
3-1-3
Connector Description
Accessory connector
Accessory connector
Accessory connector
Accessory connector
Pin No.
Pin No.
Pin No.
Pin No.
Pin Name
Pin Name
Pin Name
Pin Name
Description
Description
Description
Description
Specification
Specification
Specification
Specification
1
BUSY OUT
Output terminal for busy signal.
Open collector=OFF, 0 V=ON
2
COAXIAL SW
Output terminal for coaxial switching (antenna switching) Signal.
Open collector=OFF, 0 V=ON
3
M/S IN
Input terminal for master/slave signal.
+5 V pull up, Active=L
4
D1
Input terminal for selecting memory channel.
+5 V pull up, Active=L
5
D3
Input terminal for selecting memory channel.
+5 V pull up, Active=L
6
EXT RPT/BASE Input terminal for repeater/base operating mode switching signal.
+5 V pull up, Active=L
7
EXT MONI
Input terminal for monitor function.
+5 V pull up, Active=L
8
EXT DTCS
Input terminal for continuous tone (CTCSS/DTCS) signal.
Input impedance: 100 kΩ (approx.)
9
EXTMOD IN B
Input terminal for the modulation signals applied to input of the
splutter filter circuit.
Input impedance: 600 Ω (approx.)
15
10
EXTMOD IN A
Input terminal for the modulation signal applied to input of the pre-
emphasis circuit via the bandpass filter.
Input impedance: 600 Ω (approx.)
11
AF OUT
Output terminal for AF signals from the AF detector circuit via the
bandpass filter. Output level is fixed, regardless of [AF] control.
Output impedance: 1 kΩ (approx.)
12
DISC OUT
Output terminal for AF signals from the AF detector circuit.
Output level is fixed, regardless of [AF] control.
Output impedance: 1 kΩ (approx.)
13
+15V
Output terminal for +15V DC while in AC operation. (While in DC
operation, same as input DC.)
Output current: Less than 1 A
14
TX OUT
Output terminal for transmission state.
Open collector=OFF, 0 V=ON
15
M/S OUT
Output terminal for master/slave signal.
Open collector=OFF, 0 V=ON
16
D0
Input terminal for selecting memory channel.
+5 V pull up, Active=L
17
D2
Input terminal for selecting memory channel.
+5 V pull up, Active=L
18
D4
Input terminal for selecting memory channel.
+5 V pull up, Active=L
19
EXT PTT
Input terminal for PTT signal.
+5 V pull up, Active=L
20
RSSI
Output terminal for RSSI (Received Signal Strength Indicator) Signal.
Output impedance: 1 kΩ (approx.)
21-24
AGND
Analog ground
25
DC GND
Ground for +15 V DC