Kenwood NXR-800 Service Manual page 34

NXR-800
RX Unit (X55-3100-10)
Pin No. Name I/O
CN5 (To RX ANT)
1 RX_SIGNAL I
CN6 (To X45-382 D/5 CN701)
1 - O 9V output
2 - -
CN36 (To X45-382 D/5 CN701)
1 - I
2 - -
1 MONITOR_PORT O Use for RX BPF tuning (Coaxial)
CN42 (To X53-413 CN57)
1 GND -
2 GND -
3 NC -
4 RX_POWER_SAVE I
5 DDS_EN I
6 VCO_BAND_SW I
7 PLL1_EN I
8 DA_EN I
9 SIF_CLK I
10 GND -
11 SIF_DAT I
12 RX_AUDIO O RX audio output
13 PLL_PWR_SAVE I
14 GND -
15 NC -
16 FM_RSSI O FM RSSI output
17 PLL2_EN I
18 NC (AGC_RSSI) -
19 PLL_LOCK_DET O PLL1/PLL2 lock detect output
20 CONT_5.0V I
21 NC -
22 AD_CLK O AD logic data output
23 GND -
24 AD_CLK I
25 NC (IF_NW_SW) -
26 AD_DAT_WRITE I
27 IF_BW_SW I
28 AD_CS I
29 D_GND -
30 E2PROM_SCL I
34
TERMINAL FUNCTION
Function
Receive signal input (Coaxial)
Ground
-3V input
Ground
CN41
Ground
Ground
No connection
RX power save
Enable input for DDS
VCO band switch
Enable input for PLL1
Enable input for DA
Clock input for PLL1/PLL2/DDS/DA
Ground
Data input for PLL1/PLL2/DDS/DA
Enable input for PLL1/PLL2
Ground
No connection
Enable input for PLL2
No connection
Switched 5V supply
No connection
Ground
Clock input for AD
No connection
Serial data input for AD
IF bandwith switch input
Enable input for AD
Ground
Clock input for E2PROM
Pin No. Name I/O
31 CONT_5.0V I Switched 5V supply
32 E2PROM_SDA I/O Data input/output for E2PROM
33 D_GND - Digital ground
34 WP I Write protection input for E2PROM
35 GND - Ground
36 GND - Ground
CN43 (To X53-414 CN300)
1 RX_IF_VN O RX NXDN detection output
CN44 (To X45-382 C/5 CN15)
1 E - Ground
2 B I Power supply input
3 B I Power supply input
CN45 (To X56-312 A/3 CN406)
1 REF1 I Reference signal input
CN46
1 - I Use for RX MCF tuning
2 GND - Ground
CN47
1 - O Use for RX MCF tuning
2 - - Ground
TX Unit (X56-3120-10) (A/3)
Pin No. Name I/O
CN403
1 REF_OUT (10MHz) O Reference signal distribution (coaxial)
CN405 (To X53-414 CN302)
1 REF2 (19.2MHz) O DSP reference signal output (coaxial)
CN406 (To X55-310 CN45)
1 REF1 (19.2MHz) O Rx reference signal output (coaxial)
CN407 (To X42-328 CN2: OCXO Optional unit)
OCXO (Optional unit) reference signal
1 OCXO I
input (coaxial)
CN408
1 REF_IN (10MHz) I External reference signal input (coaxial)
CN801 (To X45-382 C/5 CN12)
1 E - Ground
2 B I Power supply (Vcc)
3 B I Power supply (Vcc)
CN802 (To X45-382 A/5 CN1)
1 TX OUT O Tx driver output signal (coaxial)
CN803 (To X42-328 CN1: OCXO Optional unit)
1 33MPU O Switched 3.3V power supply
Function
Function