Kenwood NX-420 K Service Manual

Contents

NX-42051ADJUSTMENTItemCondition Measurement Adjustment Specifications /RemarksPanel tuning mode PC test mode Test-equipment Unit Terminal Unit Parts Method3. OpenSquelch 6(Squelchlevel 5adjust)[AnalogNarrow]1) Adj item: [SQL]Adjust: [ .]2) Adj item: [S.QL_ _][S.Q.L._ _ ][S.Q.L._._.]SSG output: 12dBSINAD level(MOD: 1kHz/±1.5kHz)1) Adj item: [OpenSquelch (AnalogNarrow)]2) Adj item: [Low],[Center], [High]SSG output: 12dBSINAD level(MOD: 1kHz/±1.5kHz)SSG Panel ANTSP/MICconnector[Panel tuning mode]After input signalfrom SSG, press[B] key to store theadjustment value.[PC test mode]After input signalfrom SSG, press[Apply] button tostore the adjust-ment value.“Open Squelch”will not be adjustedcorrectly if MODand Deviation arewrong.Remark:During production,a fi xed value is writ-ten.Narrow: 110 (Fixed)Wide 4k: 110 (Fixed)Wide 5k: 110 (Fixed)[AnalogWide 4k]1) Adj item: [SQL]Adjust: [ . .]2) Adj item: [S.QL_ _][S.Q.L._ _][S.Q.L._._.]SSG output: 12dBSINAD level(MOD: 1kHz/±2.4kHz)1) Adj item: [OpenSquelch (AnalogWide 4k)]2) Adj item: [Low],[Center],[High]SSG output: 12dBSINAD level(MOD: 1kHz/±2.4kHz)[AnalogWide 5k]1) Adj item: [SQL]Adjust: [ . . .]2) Adj item: [S.QL_ _][S.Q.L._ _][S.Q.L._._.]SSG output: 12dBSINAD level(MOD: 1kHz/±3kHz)1) Adj item: [OpenSquelch (AnalogWide 5k)]2) Adj item: [Low],[Center], [High]SSG output: 12dBSINAD level(MOD: 1kHz/±3kHz)[NXDNVeryNarrow]1) Adj item: [SQL]Adjust: [ ]2) Adj item: [S.QL_ _][S.Q.L._ _][S.Q.L._._.]SSG output: 12dBSINAD level for Ana-log Narrow –4dB(MOD: 400Hz/±1.1kHz)1) Adj item: [OpenSquelch (NXDNVery Narrow)]2) Adj item: [Low],[Center], [High]SSG output: 12dBSINAD level for Ana-log Narrow –4dB(MOD: 400Hz/±1.1kHz)[Panel tuning mode]After input signalfrom SSG, press[ ] key to store theadjustment value.[PC test mode]After input signalfrom SSG, press[Apply] button tostore the adjust-ment value.Adjust with theanalog signal.This item is ad-justed under thecondition that MODis “400Hz” and De-viation is “±1.1kHz”due to the circuitconfi guration.Remark:During production,a fi xed value is writ-ten.215 (Fixed)6: Because Open Squelch (NXDN Narrow) is adjusted by adjusting Open Squelch (Analog Narrow), it is not necessary to adjust Open Squelch (NXDNNarrow).