Kenwood NXR-700 Service Manual page 39

CONTROL I/O D-sub 25-pin Connector
Pin Signal
Pin Name I/O
No. Type
1 NC (RSSI) - -
2 NC - -
3 NC - -
4 AI1 I Digital
5 AI2 I Digital
6 AI3 I Digital
7 DG - GND
8 TD I Analog
9 TA I Analog
10 RD O Analog
11 RA O Analog
12 RXG - GND
13 SPM I Digital
14 BER_CLK O Digital
15 EMON I Digital
16 EPTT I Digital
17 SC O Digital
18 BER_DAT O Digital
TERMINAL FUNCTION
Signal Summary Specifi cation
-
-
-
Programmable
Function Input 1
/CMOS
Input impedance
Programmable
Function Input 2
/CMOS
Input impedance
Programmable
Function Input 3
/CMOS
Input impedance
Digital GND
INPUT: 0.1kHz/0.5Vp-p
TX Data Input
(signaling)
Input impedance
1kHz/60% Dev
TX Audio Input
(voice)
Input impedance
RX Data Output
(signaling) INPUT: 60% Dev.
Not squelched
RX Audio Output
(voice) INPUT: 60% Dev.
Squelched
RX Signal GND
Speaker Mute
/CMOS
Input impedance
VOH (IO=–50µA)
for Bit Error Rate
Clock
VOL (IO=50µA)
External Monitor
Switch
Input impedance
External PTT Switch
Input impedance
VOH (IO=–200µA)
Squelch Control
VOL (IO=200µA)
VOH (IO=–50µA)
for Bit Error Rate
Data
VOL (IO=50µA)
Min Typ
- - -
- - -
- - -
VIH 0.8Vcc -
VIL 0 -
- 47k
VIH 0.8Vcc -
VIL 0 -
- 47k
VIH 0.8Vcc -
VIL 0 -
- 47k
- - -
0.7 0.75
- 600
270 280
- 600
75 80
380 400
- - -
VIH 0.7Vcc -
VIL - -
- 47k
Vcc–0.1 Vcc
- 0
VIH 0.8Vcc -
VIL 0 -
- 47k
VIH 0.8Vcc -
VIL 0 -
- 47k
Vcc–2.0 -
- -
Vcc–0.1 Vcc
- 0
NXR-700
Max Unit Remarks
- - -
- - -
- - -
Vcc V
Vcc=5V±2%
0.2Vcc V

- 47k PU to Vcc
Vcc V
Vcc=5V±2%
0.2Vcc V

- 47k PU to Vcc
Vcc V
Vcc=5V±2%
0.2Vcc V

- 47k PU to Vcc
- - -
0.8 kHzDEV NFM
600 PD is applied

-
to GND.
290 mV NFM
600 PD is applied

-
to GND.
85 mV -
420 mV -
- - -
5.5 V
Vcc=3.3V±2%
0.3Vcc V

-
- V 47k PU to Vcc
0.1 V
Vcc V
Vcc=5V±2%
0.2Vcc V

- -
Vcc V
Vcc=5V ±2%
0.2Vcc V

-
Vcc V
0.45 V 47k PU to Vcc
- V
0.1 V
39