Kenwood NXR-901 Service Manual page 28

NXR-901
Pin No. Name I/O
6 MICAD_SW I
7 MIC_SW I
8 RXAD_SW I
9 PATH_SW I
10 BEEP_SW I
11 TA_SW I
12 TAAD_SW I
13 EVOL_LD I
14 GND -
15 EVOL_CLK I
16 PTT_AM16C O PTT signal
17 EVOL_DATA I
18 INSP_SW -
19 AF_MUTE I
20 SCM_EN -
21 AMP_SW I
22 HOOK_RXD_SCM -
23 NC -
24 INRA_SW -
25 MIC_D_IN O NXDN transmission signal output
26 BEEP I
27 RX_AUDIO_D I
28 GND -
29 MOD_D_OUT I
30 PWR_ST_R I
31 VOLUME_IN O Volume control input for AF signal
32 OCXO_ST_G I
33 OCXO_ST_R I
34 RX_POWER_SAVE I
35 GND -
36 GND -
CN2 (To X53-414 CN402)
1 SYS_RST I
2 GND -
3 BER_CLK I
4 BER_DAT I
5 A16C_CK_SFT I
6 TRUNKING O "Trunking mode" signal to Main MPU
7 ADSP_CK_SFT I
28
TERMINAL FUNCTION
Function
Microphone input signal switch,
changed to analog modulation or
NXDN modulation
Microphone mute switch
Speaker signal switch, changed to ana-
log reception signal or NXDN reception
signal
Analog or NXDN modulation route
selector switch
Beep sound mute switch
TA input mute switch
TA input signal, changed to analog
modulation or NXDN modulation
Load for electronic volume
Ground
Clock for electronic volume
Data for electronic volume
No connection
Speaker output mute switch
No connection
Speaker amplifi er power ON/OFF switch
No connection
No connection
No connection
Beep sound signal input
NXDN reception signal input
Ground
NXDN modulation signal input
Switch for red LED (Power source)
Switch for green LED (OCXO)
Switch for red LED (OCXO)
RX unit power saving signal
Ground
Ground
System reset signal from modem con-
trol MPU
Ground
Serial clock for measurement bit error rate
Serial data for measurement bit error rate
"Frequency shift" signal to RF control MPU
"Frequency shift" signal to Analog
mode DSP
Pin No. Name I/O
8 GND - Ground
"Detect accident of RF block" signal to
9 RADIO_ERR O
Main MPU
10 QT_DQT O "Detect QT or DQT" signal to Main MPU
"During the transmission" signal to
11 TX_STATE O
Main MPU
12 RF_PTT O "Press-to-talk-switch" signal to Main MPU
13 GND - Ground
UART signal from Main CPU to RF
14 STX0_ARX0 I
control MPU
UART signal from RF control MPU to
15 SRX0_ATX0 O
Main MPU
16 GND - Ground
17 SC_SH O "Squelch control" signal to Main MPU
"External press-to-talk-switch" signal to
18 E_PTT_SH O
Main MPU
19 NC - No connection
20 50MPU_CONT I 5V regulator control
21 33SH I 3.3V constant voltage
22 33MPU_A O 3.3V constant voltage
23 50MPU_A O 5V constant voltage
24 33MPU_A_GND - Ground
25 33MPU O 3.3V constant voltage
26 33MPU O 3.3V constant voltage
27 33MPU_A_GND - Ground
28 DC50 O 5V constant voltage
29 DC50 O 5V constant voltage
30 DC50 O 5V constant voltage
31 DC50 O 5V constant voltage
32 50MPU_A_GND - Ground
33 50MPU O 5V constant voltage
34 50MPU_A_GND - Ground
35 GND - Ground
36 HI_VOL_DET O Voltage monitor
CN3 (To X56-315 B/3 CN921)
1 DC8 O 8V constant voltage
2 GND - Ground
3 DC8 O 8V constant voltage
4 DC8 O 8V constant voltage
5 50MPU O 5V constant voltage
6 50MPU O 5V constant voltage
7 GND - Ground
8 DC8 O 8V constant voltage
9 K5 O Key Scan
10 K4 O Key Scan
11 K3 I Key Scan
Function