Kenwood NXR-901 Service Manual page 30

NXR-901
Pin No. Name I/O
21 FM_RSSI I
22 NC -
23 GND -
24 PLL_PWR_SAVE O Not used
25 RX_AUDIO I
26 SIF_DAT O Data 0 for 3 line serial I/F
27 GND -
28 SIF_CLK O Clock 0 for 3 line serial I/F
29 DA_EN O Enable for 3ch DAC
30 PLL1_EN O PLL 1 enabling signal
31 VCO_BAND_SW O Not used
32 DDS_EN O Not used
33 RX_POWER_SAVE O Not used
34 NC -
35 GND -
36 GND -
CN58 (To CONTROL I/O D-sub 25-pin Connector)
1 NC -
2 NC -
3 NC -
4 NC (RSSI) -
5 BER_CLK O for Bit Error Rate Clock
6 NC -
7 EMON I
8 NC -
9 EPTT I
10 AI1 I
11 SC O
12 AI2 I
13 BER_DAT O for Bit Error Rate Data
14 AI3 I
15 TXG -
16 DG -
17 IO1 I/O Programmable function input/output 1
18 TD I
19 IO2
20 TA I
30
TERMINAL FUNCTION
Function
RSSI signal input
No connection
Ground
Reception audio signal
Ground
No connection
Ground
Ground
No connection
No connection
No connection
No connection (RSSI)
No connection
External monitor switch input
"L"=Monitor on, "H"=Monitor off
No connection
External press-to-talk switch input
"L"=PTT on, "H"=PTT off
Programmable function input 1
Squelch control output
"L"=Busy, "H"=Not busy
Programmable function input 2
Programmable function input 3
TX signal ground for TA,TD
Control line ground
TX-DATA input (data or Signaling)
Input impedance=600
Coupling=AC coupling
Deviation=0.75kHz (Narrow) at 100Hz
0.5Vpp input
Programmable function input/output 2
TX audio input (voice)
Input impedance=600
Coupling=AC coupling
Frequency response=Pre-emphasis curve
Deviation=60% deviation at 1kHz
280mVrms±25mV input
Pin No. Name I/O
21 IO3 I/O Programmable function input/output 3
RX-DATA output (data or Signaling)
output impedance=1k or less
Coupling=AC coupling
Non-squelched
22 RD O
Frequency response=±2.5dB at
10~3000Hz
Output level=70~90mVrms (standard
modulation)
23 IO4 Programmable function input/output 4
RX-Audio output (voice)
output impedance=1k or less
Coupling=AC coupling
Squelched
24 RA O
Frequency response=De-emphasis
curve
Output level=360~440mVrms (standard
modulation)
25 IO5 I/O Programmable function input/output 5
26 RXG - RX signal ground for RA, RD
27 IO6 I/O Programmable function input/output 6
Speaker mute signal input.
28 SPM I
"L"=Mute on
29 NC - No connection
30 NC - No connection
CN59 (To TEST/SPKR 15-pin Connector)
1 AO5 O Auxiliary output 5
2 AO4 O Auxiliary output 4
3 AO3 O Auxiliary output 3
4 SPO O Speaker AF output
5 AO2 O Auxiliary output 2
6 SPO O Speaker AF output
7 AO1 O Auxiliary output 1
8 SPI I Internal speaker AF input
9 RSSI O RSSI output (Analog signal output)
RX-DATA output (Equal to D-sub
10 RD O
connector terminal No22)
11 GND - Ground
12 SPG - Speaker ground
13 GND - Ground
14 SPG - Speaker ground
15 NC - No connection
16 NC - No connection
17 SB O Power supply output
18 NC - No connection
19 SB O Power supply output
20 NC - No connection
CN60 (To Internal Speaker)
1 SPO O Internal speaker AF output
2 SPG - Internal speaker ground
Function