Kenwood TS-570S, TS-570D Rejecting Interference, If Filter, Noise Blanker, If Shift

Page 42

REJECTING INTERFERENCE

1

IF FILTER

IF SHIFT

The IF filters are designed for selecting the exact range

For SSB, CW, or FSK mode, shifting the center

 

 

of intermediate frequencies that are sent to the next

frequency of the filter pass band is an additional method

 

 

stage in the receive circuit. Interference adjacent to the

of fighting adjacent frequency interference. Shifting this

2

desired signal can be reduced by selecting a narrow

center frequency does not change the current receive

bandwidth filter and/or shifting the center frequency of

frequency.

 

the filter.

To remove interference that is higher in frequency than

 

3

To more effectively remove interference, use the IF

the desired signal, turn the IF SHIFT control

filters with the DSP filters described on pages 37

counterclockwise. To remove interference that is lower

 

and 38.

in frequency than the desired signal, turn the IF SHIFT

 

 

control clockwise.

 

 

4

5

6

7

8

CHANGING IF FILTER BANDWIDTH

When adjacent frequency interference is present at both sides of the desired signal, a narrow IF filter bandwidth may be the best way to remove the interference. Changing the filter bandwidth will not effect the current receive frequency.

To use a narrow filter in SSB, CW, or FSK mode, install the appropriate optional filter {page 58}, and select the appropriate setting in Menu No. 46.

When in CW or FSK mode, the wide filter or the narrow filter is automatically selected, depending on the bandwidth of the DSP filter that you select. Refer to “CHANGING RECEIVE BANDWIDTH” {page 37}. The default in SSB or AM mode is wide bandwidth. In FM mode, you cannot change the filter bandwidth.

Note: When you use Menu B, make sure to select the appropriate filter bandwidth via Menu No. 46 in Menu B.

Desired Interfering

signal signal

NOISE BLANKER

Noise Blanker was designed to reduce pulse noise such as that generated by automobile ignitions. Noise Blanker does not function in FM mode.

Press [NB] to toggle Noise Blanker ON or OFF.

9

10

11

• “NB” appears when the function is ON.

Interfering

Desired

Interfering

signal

signal

signal

12

13

14

15

16

1Select SSB or AM mode.

2Press [FILTER].

• The current filter selection appears.

3Turn the MULTI/CH control to select Wide (“FIL-WID”) or Narrow (“FIL-NAR”).

4Press [FILTER] to complete the setting.

36

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Contents TS-570S Applicable Model Supplied AccessoriesAccessory Part Number Intelligent Digital Enhanced Communications SystemWriting Conventions Followed FeaturesKEY+ Power on KEY2Contents Installing Options Memory FeaturesOptional Accessories Specifications Appendix COM Connector Protocol IndexPower Lines Power SourcePower Cable Protection CleaningAPPROX. Loss dB PER 30 Meters 100 Feet InstallationAntenna Connection Correctly Matched 50 Ω LineGround Connection DC Power Supply ConnectionInstallation Lightning ProtectionAccessory Connections Front PanelRear Panel RF control Fully clockwise Your First QSOSet the following as specified AF control Fully counterclockwise If Shift control Center SQL controlYour Getting Acquainted Front PanelGetting Acquainted TF-SET button UP/DOWN buttonsSplit button Clear buttonMicrophone KEY and Paddle jacks Rear PanelGND post EXT SP jackDisplay @8USB @6M.SCR@7LSB #1FSKOperating Basics Switching Power ON/OFFAdjusting Volume Selecting VFO a or VFO BSelecting a Frequency Selecting a ModeAdjusting Squelch Front Panel MeterTransmitting Selecting Transmit PowerPress PWR again to complete the setting Microphone GainMenu Setup What is a MENU?Menu A/ Menu B Page Page Menu Setup Cross Reference for Menu FunctionsBasic Communicating SSB TransmissionTX SIDETONE/ RX Pitch Frequency CW TransmissionBasic Communicating Auto ZERO-BEATTX Deviation Selection FM TransmissionAM Transmission Press FilterTF-SET Transmit Frequency SET Specialized CommunicatingSPLIT-FREQUENCY Operation UP/DWNArrl 10-METER Band Plan FM Repeater OperationSpecialized Communicating Mode/ActivitySpecialized Communicating Selecting Subtone Frequency When you are calledWhen you make a call Continuous or Burst SUBTONES?Rtty Frequencies Digital OperationRtty Frequency Shift Keying Iaru Region A./CanadaPacket Frequencies Mode MeaningMode Data Rate Europe/AfricaSlow Scan TV/ Facsimile Sstv FrequenciesCommunicating Aids ReceivingSelecting Your Frequency RX Equalizer RIT Receive Incremental TuningCommunicating Aids AGC Automatic Gain ControlVOX VOICE-OPERATED Transmit Microphone Input LevelXIT Transmit Incremental Tuning Communicating Aids Speech ProcessorEqualizing Transmit Audio SSB/FM/AM Transmit InhibitChanging Transmit Bandwidth SSB/AM BandwidthCW BREAK-IN Auto WeightingReversible Auto Weighting Electronic KeyerChanging LOCKED-WEIGHT BUG KEY FunctionCW Message Memory Noise Blanker Rejecting InterferenceIf Filter If ShiftDSP Tools AttenuatorPreamplifier Rejecting InterferenceNoise Reduction Beat CancelSetting NR2 Time Constant CW/ FSK ModesStoring Data in Memory Memory FeaturesConventional Memory Simplex ChannelsMemory Recall Memory FeaturesSplit-Frequency Channels Memory Recall and ScrollMemory-VFO Split Operation Memory ScrollTemporary Frequency Changes To use a memory channel for receivingMemory Features Memory Transfer Memory VFO TransferChannel Channel Transfer Erasing Memory Channels Full ResetStoring Frequency Ranges Confirming Start/End FrequenciesVOX ON/OFF Storing Into Quick MemoryMemory Channel Lockout RIT ON/OFF XIT ON/OFFMemory Features Recalling Quick Memory Temporary Frequency ChangesQuick Memory VFO Transfer Scan Hold ScanProgram Scan Transceiver provides the following types of ScanALL-CHANNEL Scan Memory ScanScan Group ScanOperator Conveniences Microprocessor ResetSwitching ANT 1/ ANT Frequency Lock FunctionBeep Function Display DimmerProgram Function Button Quick Data Transfer Setting UPUsing Quick Transfer Operator ConveniencesComputer Control Using a TransverterMenu Setting Communication ParametersPresetting Automatic Antenna TunerAT Tune again Message Playback DRU-3A Digital Recording UnitOptional Recording MessagesChanging Volume Sending MessagesChanging Inter-message Interval Menu New ModeSteps VoicePC-1A Optional AccessoriesDRU-3A PG-2ZInstalling Options Removing the Bottom CaseInstalling Options VS-3 Voice Synthesizer UnitFilters SO-2 TEMPERATURE-COMPENSATED Crystal Oscillator TcxoCut the leads of the R503 and R504 resistors Computer Compatible TransceiverLinear Amplifier Connecting Peripheral EquipmentRtty Equipment Antenna TunerMCP and TNC Pin No FunctionService MaintenanceService Note CleaningAccessing the Internal Fuse Internal AdjustmentsMaintenance Reference Frequency CalibrationFollowed TroubleshootingProblem Probable Cause Corrective Action DSP Slope LOW control orChanging Receive Press LSB/USB, CW/FSK, orPress LSB/USB or FM/AM to Repeater Operation Communication ParametersFSK, FM Max 100 W Output powerTS-570S TS-570D Min Max 25 WSpecifications SSB, CW, FSKAppendix Hardware DescriptionControl Operation COMError Messages Computer Control CommandsAlphabetical Commands 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 DSP VFOSstv
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