Kenwood TS-570S, TS-570D Beat Cancel, Noise Reduction, CW/ FSK Modes, Changing NR1 Performance

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9 REJECTING INTERFERENCE

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■CW/ FSK Modes

1Select CW or FSK mode.

2Press [FILTER].

• The current filter selection appears.

3Turn the MULTI/CH control clockwise to widen the bandwidth, or counterclockwise to narrow the bandwidth.

Interfering Desired Interfering

signal signal signal

4Press [FILTER] to complete the setting.

Mode

Bandwidth Selections (Hz)

Default

(Hz)

 

 

CW

50, 80, 100, 150, 200, 300,

600

400, 500, 600, 1.0 k, 2.0 k

 

 

 

 

 

FSK

250, 500, 1.0 k, 1.5 k

1.5 k

 

 

 

Depending on which bandwidth you select for the DSP filter and which type of optional filter you install, the wide IF filter or the narrow IF filter will automatically be selected.

Optional

Mode

DSP Filter Bandwidth

IF Filter

Filter

Bandwidth

 

CW

2.0 kHz

Wide

 

 

 

YK-88SN-1

1.0 kHz or lower

Narrow

SSB

 

 

 

 

1.5 kHz

Wide

(1.8 kHz)

FSK

 

 

 

250

Hz, 500 Hz,

Narrow

 

 

 

1.0 kHz

 

 

 

 

 

 

 

YK-88C-1

CW

1.0 kHz, 2.0 kHz

Wide

 

600

Hz or lower

Narrow

CW

 

 

 

 

 

 

1.0 kHz, 1.5 kHz

Wide

(500 Hz)

FSK

250

Hz, 500 Hz

Narrow

 

 

 

 

 

 

 

YK-88CN-1

 

300

Hz or higher

Wide

CW

CW

50 Hz, 100 Hz,

Narrow

(270 Hz)

 

200

Hz

 

 

BEAT CANCEL

Beat Cancel uses an adaptive filter and attenuates more than one cyclic interference within the receive pass band. The adaptive filter changes its characteristics according to the nature of the signal being received at a given moment. You can use Beat Cancel when in SSB, FM, or AM mode.

Receive pass band

Interfering tones

Desired signal

BeforeAfter

Press [B.C.] to toggle Beat Cancel ON or OFF.

•“BEAT CANCEL” appears when the function is ON.

Note: While receiving intermittent CW signals, the transceiver sounds clicks. This does not indicate a malfunction.

If attenuation is not satisfactory, press [B.C.] for

1 second or longer to enhance the attenuation effect; a beep sounds, but no change occurs on the display. Pressing [B.C.] for 1 second or longer again restores the original attenuation level.

Note:

◆The Enhanced Beat Cancel setting is cleared when the power to the transceiver is turned OFF.

◆Enhanced Beat Cancel may adversely affect desired signals slightly because of its stronger effect.

NOISE REDUCTION

This transceiver provides two types of Noise Reduction functions, 1 and 2, for reducing random noise which interferes with the desired signal. Just trying them both is the easiest way to judge which function works more effectively under the current condition. Normally select Noise Reduction 1 in SSB mode and select Noise Reduction 2 in CW mode.

Note: Using Noise Reduction 2 in SSB mode may lower the clarity of signals or induce pulse noise depending on conditions.

Press [N.R.] to toggle between Noise Reduction 1, Noise Reduction 2, and OFF.

•“N. R. 1” or “N.R. 2” appears depending on which function is selected.

Note: A different selection can be made between two groups of modes; one group includes SSB, FM, and AM, and the other group includes CW and FSK. So you need not change the selection each time you switch modes between the two groups.

■Changing NR1 Performance

Use Menu No. 51 to change the effect of Noise Reduction 1. Switch Noise Reduction 1 ON, then select level 1 to 9 in this menu while receiving signals. The default is “Auto”; this selection provides an optimum effect according to the strength of the received signal.

Note:

◆Using a high NR1 level and Beat Cancel simultaneously may cause noise to stand out; this does not indicate a malfunction.

◆When changing the NR1 level in the menu, you will hear sound momentarily caused by an internal operation change; this does not indicate a malfunction.

■Setting NR2 Time Constant

You can change the correlation time for Noise Reduction 2. When in SSB, select the correlation time that allows you to hear signals with more clarity. When receiving CW, it is best to select the longest correlation time that allows reliable reception. The longer the correlation time, the better S/N.

Access Menu No. 12 and select 7.5 ms or 20 ms. The default is 20 ms.

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Contents TS-570S Supplied Accessories Accessory Part NumberApplicable Model Intelligent Digital Enhanced Communications SystemFeatures KEY+ Power onWriting Conventions Followed KEY2Contents Memory Features Optional AccessoriesInstalling Options Specifications Appendix COM Connector Protocol IndexPower Source Power Cable ProtectionPower Lines CleaningInstallation Antenna ConnectionAPPROX. Loss dB PER 30 Meters 100 Feet Correctly Matched 50 Ω LineDC Power Supply Connection InstallationGround Connection Lightning ProtectionRear Panel Accessory ConnectionsFront Panel Your First QSO Set the following as specified AF controlRF control Fully clockwise Fully counterclockwise If Shift control Center SQL controlYour Getting Acquainted Front PanelGetting Acquainted UP/DOWN buttons Split buttonTF-SET button Clear buttonMicrophone Rear Panel GND postKEY and Paddle jacks EXT SP jackDisplay @6M.SCR @7LSB@8USB #1FSKSwitching Power ON/OFF Adjusting VolumeOperating Basics Selecting VFO a or VFO BSelecting a Mode Adjusting SquelchSelecting a Frequency Front Panel MeterSelecting Transmit Power Press PWR again to complete the settingTransmitting Microphone GainMenu A/ Menu B Menu SetupWhat is a MENU? Page Page Menu Setup Cross Reference for Menu FunctionsBasic Communicating SSB TransmissionCW Transmission Basic CommunicatingTX SIDETONE/ RX Pitch Frequency Auto ZERO-BEATFM Transmission AM TransmissionTX Deviation Selection Press FilterSpecialized Communicating SPLIT-FREQUENCY OperationTF-SET Transmit Frequency SET UP/DWNFM Repeater Operation Specialized CommunicatingArrl 10-METER Band Plan Mode/ActivityWhen you are called When you make a callSpecialized Communicating Selecting Subtone Frequency Continuous or Burst SUBTONES?Digital Operation Rtty Frequency Shift KeyingRtty Frequencies Iaru Region A./CanadaMode Meaning Mode Data RatePacket Frequencies Europe/AfricaSlow Scan TV/ Facsimile Sstv FrequenciesSelecting Your Frequency Communicating AidsReceiving RIT Receive Incremental Tuning Communicating AidsRX Equalizer AGC Automatic Gain ControlVOX VOICE-OPERATED Transmit Microphone Input LevelXIT Transmit Incremental Tuning Communicating Aids Speech ProcessorTransmit Inhibit Changing Transmit Bandwidth SSB/AMEqualizing Transmit Audio SSB/FM/AM BandwidthAuto Weighting Reversible Auto WeightingCW BREAK-IN Electronic KeyerCW Message Memory Changing LOCKED-WEIGHTBUG KEY Function Rejecting Interference If FilterNoise Blanker If ShiftAttenuator PreamplifierDSP Tools Rejecting InterferenceBeat Cancel Setting NR2 Time ConstantNoise Reduction CW/ FSK ModesMemory Features Conventional MemoryStoring Data in Memory Simplex ChannelsMemory Features Split-Frequency ChannelsMemory Recall Memory Recall and ScrollMemory Scroll Temporary Frequency ChangesMemory-VFO Split Operation To use a memory channel for receivingChannel Channel Transfer Memory Features Memory TransferMemory VFO Transfer Full Reset Storing Frequency RangesErasing Memory Channels Confirming Start/End FrequenciesStoring Into Quick Memory Memory Channel LockoutVOX ON/OFF RIT ON/OFF XIT ON/OFFQuick Memory VFO Transfer Memory Features Recalling Quick MemoryTemporary Frequency Changes Scan Program ScanScan Hold Transceiver provides the following types of ScanMemory Scan ScanALL-CHANNEL Scan Group ScanMicroprocessor Reset Switching ANT 1/ ANTOperator Conveniences Frequency Lock FunctionProgram Function Button Beep FunctionDisplay Dimmer Setting UP Using Quick TransferQuick Data Transfer Operator ConveniencesUsing a Transverter Menu SettingComputer Control Communication ParametersAT Tune again PresettingAutomatic Antenna Tuner DRU-3A Digital Recording Unit OptionalMessage Playback Recording MessagesChanging Inter-message Interval Changing VolumeSending Messages New Mode StepsMenu VoiceOptional Accessories DRU-3APC-1A PG-2ZInstalling Options Removing the Bottom CaseFilters Installing OptionsVS-3 Voice Synthesizer Unit Cut the leads of the R503 and R504 resistors SO-2 TEMPERATURE-COMPENSATEDCrystal Oscillator Tcxo Computer Compatible TransceiverConnecting Peripheral Equipment Rtty EquipmentLinear Amplifier Antenna TunerMCP and TNC Pin No FunctionMaintenance Service NoteService CleaningInternal Adjustments MaintenanceAccessing the Internal Fuse Reference Frequency CalibrationTroubleshooting Problem Probable Cause Corrective ActionFollowed DSP Slope LOW control orPress LSB/USB or FM/AM to Changing ReceivePress LSB/USB, CW/FSK, or Repeater Operation Communication ParametersMax 100 W Output power TS-570S TS-570DFSK, FM Min Max 25 WSpecifications SSB, CW, FSKHardware Description Control OperationAppendix COMComputer Control Commands Alphabetical CommandsError Messages ParametersAlphabetical Command Table OFF/ONParameter Table FormatMenu Selection Table for EX Command UP/DOWNReading Command Tables Computer Control Command TablesDN UP DOWN/UP LK Frequency Lock MG MIC Gain RT RIT RX TX RX, TX VOX Function Sstv DSPVFO
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