Kenwood NX-720 Service Manual page 58

NX-720(G)/720
Pin Pin Signal
I/O
No. Name
DETO O
4 Analog
AFO O
DATAI I
5 Analog
MI2 I
FNC1/
I/O Digital
TXD
6
TXD
(RS- O Digital
232C)
FNC2/
I/O Digital
RXD
7
RXD
(RS- I Digital
232C)
FNC3 I/O Digital
8
RTS
(RS- O Digital
232C)
FNC4 I/O Digital
9
CTS
(RS- I Digital
232C
10 FNC5 I/O Digital
58
TERMINAL FUNCTION
Description
Type
FM detector output
RX Audio output
External Modulation input
External MIC AF Input
Programmable I/O
RS-232C Serial port
(TXD)
Programmable I/O
RS-232C Serial port
(RXD)
Programmable I/O
RS-232C Serial port
(RTS)
Programmable I/O
RS-232C Serial port
(CTS)
Programmable I/O
Item and Condition Min
Output Level -
Coupling Capacitor -
Allowable Load 600
Output Level -
Coupling Capacitor -
Allowable Load 600
Input Voltage Range -
Input Impedance -
Input Voltage Range -
Allowable Frequency 300
Input Impedance -
VIH 4.0
VIL -0.5
VOH (Io=-1.5mA) 4.0
VOL (Io=1.5mA) -
Voltage Swing ±5
Baud Rate 1200
CL
VIH 4.0
VIL -0.5
VOH (Io=-1.5mA) 4.0
VOL (Io=1.5mA) -
Input Voltage Range -30
Threshold Low 0.5
Threshold High -
Baud Rate 1200
VIH 4.0
VIL -0.5
VOH (Io=-1.5mA) 4.0
VOL (Io=1.5mA) -
Voltage Swing ±5
VIH 4.0
VOH -0.5
VOH (Io=-1.5mA) 4.0
VOL (Io=1.5mA) -
Input Voltage Range -30
Threshold Low 0.5
Threshold High -
VIH 4.0
VOH -0.5
VOH (Io=-1.5mA) 4.0
VOL (Io=1.5mA) -
Typ Max Unit
0.28 - Vp-p
4.7 - uF

- -
0.24 - Vp-p
4.7 - uF

- -
0.5 1.98 Vp-p Standard deviation
100 - k
5 - mVrms
- 3000 Hz

600 -
- 5.2 V
- 1.0 V
- 5.2 V
- 1.1 V
±9 - V 3k Load
- 19200 bps
100 pF
- 5.2 V
- 1.0 V
- 5.2 V
- 1.1 V
- 30 V
1.3 - V
1.75 2.6 V
- 19200 bps
- 5.2 V
- 1.0 V
- 5.2 V
- 1.1 V
±9 - V 3k Load
- 5.2 V
- 1.0 V
- 5.2 V
- 1.1 V
- 30 V
1.3 - V
1.75 2.6 V
- 5.2 V
- 1.0 V
- 5.2 V
- 1.1 V
Note