Kenwood NXR-700H Service Manual

NXR-700H52Pin No. Name I/O Function25 REF_LDT I Lock detection signal from PLL (19.2MHz)26 GND - Ground27 PLL_19_EN O Serial data enabling signal to PLL (19.2MHz)28 GND - Ground29 PLL_19_CE - No connection30 GND - Ground31 OX_SDO2 O DAC of OCXO unit to serial data output32 GND - Ground33 OX_SCLK2 O DAC of OCXO unit to serial clock output34 33MPU O 3.3V constant voltage35 GND - Ground36 GND - GroundCN401 (To X53-413 CN1)1 GND - Ground2 GND - Ground3 RX_POWER_SAVE O Power saving signal of RX unit4 OCXO_ST_R O OCXO LED red control5 OCXO_ST_G O OCXO LED green control6 VOLUME_IN I Voltage monitor for audio level control7 PWR_ST_R O POWER LED red control8 MOD_D_OUT O Transmission modulating signal ofNXDN mode9 GND - Ground10 RX_AUDIO_D O Reception demodulating signal ofNXDN mode11 BEEP O Beep sound signal output12 MIC_D_IN I Audio signal before the transmissioncompressing of the NXDN mode13 INRA_SW - No connection14 NC - No connection15 HOOK_RXD_SCM I Hook detection input16 AMP_SW O Power source control of audio poweramplifier17 SCM_EN - No connection18 AF_MUTE O Audio mute control19 INSP_SW - No connection20 EVOL_DATA O Serial data to DAC(for audio level adjustment)21 PTT_AM16C I “Press-to-talk-switch” signal to Main MPU22 EVOL_CLK O Serial clock to DAC(for audio level adjustment)23 GND - Ground24 EVOL_LD O Serial load to DAC(for audio level adjustment)25 TAAD_SW O Route formation signal of audio circuit26 TA_SW O Route formation signal of audio circuit27 BEEP_SW O Route formation signal of audio circuit管脚号名称输入 / 输出功能25 REF_LDT 输入来自 PLL(19.2MHz) 的锁定检测信号26 GND - 接地27 PLL_19_EN 输出至 PLL(19.2MHz) 的串行数据启用信号28 GND - 接地29 PLL_19_CE - 未连接30 GND - 接地31 OX_SDO2 输出至串行数据输出的 OCXO 单元的 DAC32 GND - 接地33 OX_SCLK2 输出至串行时钟输出的 OCXO 单元的 DAC34 33MPU 输出 3.3V 恒定电压35 GND - 接地36 GND - 接地CN401( 至 X53-413 CN1)1 GND - 接地2 GND - 接地3 RX_POWER_SAVE 输出 RX 单元的节电信号4 OCXO_ST_R 输出 OCXO LED 红色控制5 OCXO_ST_G 输出 OCXO LED 绿色控制6 VOLUME_IN 输入用于音频电平控制的电压监视器7 PWR_ST_R 输出 POWER LED 红色控制8 MOD_D_OUT 输出 NXDN 模式的发射调制信号9 GND - 接地10 RX_AUDIO_D 输出 NXDN 模式的接收解调信号11 BEEP 输出提示音信号输出12 MIC_D_IN 输入 NXDN 模式发射压缩之前的音频信号13 INRA_SW - 未连接14 NC - 未连接15 HOOK_RXD_SCM 输入挂钩检测输入16 AMP_SW 输出音频功率放大器的电源控制17 SCM_EN - 未连接18 AF_MUTE 输出音频静音控制19 INSP_SW - 未连接20 EVOL_DATA 输出至 DAC 的串行数据( 用于音频电平调整 )21 PTT_AM16C 输入至主 MPU 的“按讲开关”信号22 EVOL_CLK 输出至 DAC 的串行时钟( 用于音频电平调整 )23 GND - 接地24 EVOL_LD 输出至 DAC 的串行负载( 用于音频电平调整 )25 TAAD_SW 输出音频电路的路径形成信号26 TA_SW 输出音频电路的路径形成信号27 BEEP_SW 输出音频电路的路径形成信号TERMINAL FUNCTION / 端子功能