Kenwood NXR-700 Service Manual

Also see for NEXEDGE NXR-700: Brochure Instruction manual Service manual Instruction manual Instruction manual

Contents

NXR-70031Pin No. Name I/O Function5 E2PROM_SDA I/O Data of EEPROM6 CONT_5.0V - 5V constant voltage7 E2PROM_SCL O Clock of EEPROM8 D_GND - Digital Ground9 AD_CS O Enable for 8ch DAC10 IF_BW_SW O IF_ bandwidth switch11 AD_DAT_WRITE O Data 0 for 3 line serial12 NC (IF_NW_SW) - No connection13 AD_CLK O Clock 0 for 3 line serial14 GND - Ground15 AD_DAT_READ I Analog data of 8ch ADC16 NC - No connection17 CONT_5.0V - 5V constant voltage18 PLL_LOCK_DET I PLL1,2 lock detection19 NC(AGC_RSSI) - No connection20 PLL2_EN O PLL 2 enabling signal21 FM_RSSI I RSSI signal input22 NC - No connection23 GND - Ground24 PLL_PWR_SAVE O PLL1,2 chip selection signal25 RX_AUDIO I Reception audio signal26 SIF_DAT O Data 0 for 3 line serial27 GND - Ground28 SIF_CLK O Clock 0 for 3 line serial29 3DA_EN O Enable for 3ch DAC30 PLL1_EN O PLL 1 enabling signal31 VCO_BAND_SW O VCO bandwidth switch32 DDS_EN O Enable for DDS33 RX_POWER_SAVE O Power saving signal of RX unit34 NC - No connection35 GND - Ground36 GND - GroundCN58 (To CONTROL I/O D-sub 25-pin Connector)1 NC - No connection2 NC - No connection3 NC - No connection4 NC (RSSI) - No connection (RSSI)5 BER_CLK O for Bit Error Rate Clock6 NC - No connection7 EMON I External monitor switch input“L”=Monitor on, “H”=Monitor off8 NC - No connectionPin No. Name I/O Function9 EPTT I External press-to-talk switch input“L”=PTT on, “H”=PTT off10 AI1 I Programmable function input 111 SC O Squelch control output“L”=Busy, “H”=Not busy12 AI2 I Programmable function input 213 BER_DAT O for Bit Error Rate Data14 AI3 I Programmable function input 315 TXG - TX siganal ground for TA,TD16 DG - Control line ground17 IO1 I/O Programmable function input/output 118 TD ITX-DATA input (data or Signaling)Input impedance=600Coupling=AC couplingDeviation=0.75kHz (Wide)/ 0.75kHz(Narrow) at 100Hz 0.5Vpp input19 IO2 Programmable function input/output 220 TA ITX audio input (voice)Input impedance=600Coupling=AC couplingFrequency response=Pre-emphasis curveDeviation=60% deviation at 1kHz280mVrms±25mV input21 IO3 I/O Programmable function input/output 322 RD ORX-DATA output (data or Signaling)output impedance=1k or lessCoupling=AC couplingNon-squelchedFrequency respones=±2.5dB at10~3000HzOutput level=70~90mVrms (standardmodulation)23 IO4 Programmable function input/output 424 RA ORX-Audio output (voice)output impedance=1k or lessCoupling=AC couplingSquelchedFrequency respones=De-emphasiscurveOutput level=360~440mVrms (standardmodulation)25 IO5 I/O Programmable function input/output 526 RXG - RX siganal ground for RA, RD27 IO6 I/O Programmable function input/output 628 SPM I Speaker mute signal input.“L”=Mute on29 NC - No connection30 NC - No connectionCN59 (To TEST/SPKR 15-pin Connector)1 AO5 O Auxiliary output 52 AO4 O Auxiliary output 4TERMINAL FUNCTION