NXR-901
28
Pin No.
Name
I/O
Function
6
MICAD_SW
I
Microphone input signal switch,
changed to analog modulation or
NXDN modulation
7
MIC_SW
I
Microphone mute switch
8
RXAD_SW
I
Speaker signal switch, changed to ana-
log reception signal or NXDN reception
signal
9
PATH_SW
I
Analog or NXDN modulation route
selector switch
10
BEEP_SW
I
Beep sound mute switch
11
TA_SW
I
TA input mute switch
12
TAAD_SW
I
TA input signal, changed to analog
modulation or NXDN modulation
13
EVOL_LD
I
Load for electronic volume
14
GND
-
Ground
15
EVOL_CLK
I
Clock for electronic volume
16
PTT_AM16C
O
PTT signal
17
EVOL_DATA
I
Data for electronic volume
18
INSP_SW
-
No connection
19
AF_MUTE
I
Speaker output mute switch
20
SCM_EN
-
No connection
21
AMP_SW
I
Speaker amplifi er power ON/OFF switch
22
HOOK_RXD_SCM
-
No connection
23
NC
-
No connection
24
INRA_SW
-
No connection
25
MIC_D_IN
O
NXDN transmission signal output
26
BEEP
I
Beep sound signal input
27
RX_AUDIO_D
I
NXDN reception signal input
28
GND
-
Ground
29
MOD_D_OUT
I
NXDN modulation signal input
30
PWR_ST_R
I
Switch for red LED (Power source)
31
VOLUME_IN
O
Volume control input for AF signal
32
OCXO_ST_G
I
Switch for green LED (OCXO)
33
OCXO_ST_R
I
Switch for red LED (OCXO)
34
RX_POWER_SAVE
I
RX unit power saving signal
35
GND
-
Ground
36
GND
-
Ground
CN2 (To X53-414 CN402)
1
SYS_RST
I
System reset signal from modem con-
trol MPU
2
GND
-
Ground
3
BER_CLK
I
Serial clock for measurement bit error rate
4
BER_DAT
I
Serial data for measurement bit error rate
5
A16C_CK_SFT
I
“Frequency shift” signal to RF control MPU
6
TRUNKING
O
“Trunking mode” signal to Main MPU
7
ADSP_CK_SFT
I
“Frequency shift” signal to Analog
mode DSP
Pin No.
Name
I/O
Function
8
GND
-
Ground
9
RADIO_ERR
O
“Detect accident of RF block” signal to
Main MPU
10
QT_DQT
O
“Detect QT or DQT” signal to Main MPU
11
TX_STATE
O
“During the transmission” signal to
Main MPU
12
RF_PTT
O
“Press-to-talk-switch” signal to Main MPU
13
GND
-
Ground
14
STX0_ARX0
I
UART signal from Main CPU to RF
control MPU
15
SRX0_ATX0
O
UART signal from RF control MPU to
Main MPU
16
GND
-
Ground
17
SC_SH
O
“Squelch control” signal to Main MPU
18
E_PTT_SH
O
“External press-to-talk-switch” signal to
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
TERMINAL FUNCTION
Summary of Contents for NEXEDGE NXR-901
Page 154: ...1 E CN300 RX_IF_VN ...
