Kenwood TS-890S In-Depth Manual

TABLE OF CONTENTS
01 PROLOGUE
AbouttheReleaseoftheTS‑890S................................... 1
FeaturesoftheTS‑890S.................................................. 2
02 RECEPTIONCIRCUIT
ReceiverConguration.................................................... 3
FirstMixer........................................................................ 5
RoongFilters.................................................................. 5
WhatisaRoongFilter?.........................................................5
RoongFilters.........................................................................6
AGCCircuits.................................................................... 7
AnalogAGCCircuits................................................................7
OptimizationOfGainDistribution............................................8
DeectionoftheSMeterNeedle.............................................8
NoiseLevel..............................................................................9
RFGainAdjustment................................................................9
AGCO...................................................................................9
NoiseBlankers............................................................... 10
FeaturesoftheNB1andNB2...............................................10
AuxiliaryCircuits............................................................ 11
MediumWaveBandSensitivityRisers..................................11
03 TRANSMISSIONCIRCUIT
IFCircuitforCleanandStable100WOutputPower...... 12
FETFinalAmplierCircuit............................................. 12
High‑speedRelay‑controlledAntennaTuner.................. 13
LinearAmplierControl................................................. 14
REMOTEConnector.............................................................14
LinearAmplierMenuSettings..............................................15
ALC.......................................................................................17
TransmitPowerLimiter..........................................................18
ALCOperationwhenanExternalDeviceisConnected.........19
DRVTerminal................................................................. 20
Protections..................................................................... 21
SWRProtection.....................................................................21
OvercurrentProtection..........................................................21
ThermalProtectionandFanControl......................................21
04 LOCALOSCILLATORCIRCUIT
LocalOscillator.............................................................. 22
FirstLocalOscillatorSignal...................................................22
05 ANTENNACONTROLCIRCUIT
SignalingPaths.............................................................. 24
RXAntennaFeature(RXIN/RXOUTConnectors)..............24
AntennaOutputFeature(ANTOUTConnector)....................24
TS‑890SUserReport............................................................25
06 MPUPERIPHERALCIRCUIT
MPUPeripheralsforTransceiverControl........................ 28
MPUPeripheralsforApplicationControl........................ 28
MPUPeripheralsforOperationPanelControl................ 28
07 DSP
FeaturesofTS‑890SDSPTechnologies........................ 29
DSPsandPeripheralHardware..................................... 29
SignalProcessingintheIFStage.................................. 30
IF‑AGC..................................................................................30
AGCQuickRecovery............................................................31
IFFilter..................................................................................32
InterferenceRejection...........................................................34
Reception...................................................................... 36
Demodulation........................................................................36
AFFilter.................................................................................37
AudioPeakFilter...................................................................38
NoiseReduction....................................................................39
BeatCanceler........................................................................42
SignalProcessingbyMorseCodeDecoder..........................43
Transmission.................................................................. 44
Modulation............................................................................44
MicrophoneGainControl......................................................46
SpeechProcessors...............................................................46
OtherFunctions............................................................. 48
TX/RXEqualizers..................................................................48
VoiceGuidance.....................................................................48
08 BANDSCOPE
MoreUser‑friendlyBandscope...................................... 49
DierenceswiththeTS‑990SasanFFTBandscope............49
3TypesofScopeDisplayModes...........................................49
ReferenceLevel.....................................................................50
TouchscreenTuning...............................................................50
GradationSettings.................................................................51
TuningAssistLine,FilterPassbandDisplayandFrequency
Marker...................................................................................51
09 SOFTWARE
DisplayFunctionforActualOperation............................ 52
Meter.....................................................................................52
TransmissionDigitalMeter....................................................53
FilterScope...........................................................................53
OperabilityImprovementsforSplitOperation................. 54
SplitFrequencyCongurationByUsingtheNumeric
Keypad
..................................................................................54
BandDirectKeyCongurationforSplit..................................54
SplitFrequencyChangeByUsingtheRIT/XITKnob.............54
SplitFrequencyReceptionByUsinganExternalSub
Receiver
................................................................................55

Kenwood TS-890S Specifications

General

DSP	Yes
Supply Voltage	13.8 V DC ±15%
Weight	10.5 kg
Modes	SSB, CW, AM, FM
RF Output Power	100 W
Receiver Type	Superheterodyne
Display	7-inch TFT
Antenna Tuner	Built-in
Image Rejection	>80 dB
IF Rejection	>80 dB
Current Drain	TX: 20.5 A