Kenwood TS-870S Internal Adjustments, Maintenance, Reference Frequency Calibration

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12 MAINTENANCE

INTERNAL ADJUSTMENTS

DRU-3 DIGITAL RECORDING UNIT (OPTIONAL)

RECORD LEVEL ADJUSTMENT

REFERENCE FREQUENCY CALIBRATION

Note: The transceiver is adjusted at the factory prior to shipping. Unless necessary, DO NOT perform this adjustment.

1Remove the top case (10 screws) from the transceiver.

2Set the following on the transceiver:

¥Mode: CW

¥MONI control: Center

¥AF gain control: Center

¥Menu No. 24 (CW PITCH): 800 Hz

¥HI/SHIFT control: 800 Hz

¥LO/WIDTH control: 1000 Hz

¥RIT function: OFF

¥Break-in Function (VOX): OFF

3Tune in a standard frequency station such as WWV or WWVH at, for example, 10.000 or 15.000 MHz. Adjust the transceiver Tuning control so the Display reads the exact frequency of the station. You should hear a beat tone of approximately 800 Hz.

For 800 Hz:

faf = (fdisplay/20.000 x ∆freference) + 800 Hz where ∆freference is the shift from the 20 MHz reference frequency

4Close your CW key and you will hear a transmit sidetone of approximately 800 Hz. This sidetone produces a double beat tone when it combines with the received signal. Adjust the AF gain control and the MONI control so you can hear the double beat clearly.

For 800 Hz:

fsidetone = 800 Hz x [(20 x 106 + ∆freference)/20 x 106] where ∆freference is the shift from the 20 MHz reference frequency

5Adjust the TC-800 trimmer to minimize the frequency difference between the received 800 Hz tone and the 800 Hz sidetone.

Remove the top case.

Remove the bottom case.

VR3

AT-300 EXTERNAL TUNER (OPTIONAL)

FUSE LOCATION

Remove the top case.

Fuse for

AT-300

TC-800

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Contents TS-870S Writing Conventions Followed Applicable ModelKEY2 Power Sources Power Cable ProtectionPower Lines CleaningContents Rejecting Interference Memory FeaturesScan Maintenance Optional AccessoriesInstalling Options Specifications AppendicesDSP Maximum SIGNAL/ Minimum Noise FeaturesSupplied Accessories IntroductionAntenna Connection InstallationTransmission Line MHz 14 MHz 30 MHz DC Power Supply Connection InstallationGround Connection Lightning ProtectionFront Panel Accessory ConnectionsRear Panel Computer Interface COM Rtty Equipment Rtty and ACCLinear Amplifier Remote Pin FunctionAntenna Tuner AT Accessory Equipment ACCSM-230 Station Monitor if OUT Pin No. Pin Name ANO GND PSQ SmetPKS PKDYour First QSO First QSO Front Panel Getting Acquainted@4QUICK Memo M.IN button 6KEY Speed control@5QUICK Memo MR button @7Tuning control Enter buttonLSB/USB button CW/ÐR button#3BEAT Cancel button RX M.CH button#5TX EQ. button #6FILTER LO/WIDTH and HI/SHIFT controlsMicrophone $4RIT/XIT control$7M.CH/VFO.CH control UP/DWN buttonsRear Panel Display 0AUTO1PROC 2MONI5MENU 7SPLIT8RIT 9TONE#2ON AIR #3AT Tune#4FSK #7M.SCRSwitching Power ON/OFF Adjusting VolumeAdjusting Squelch Operating BasicsOperating Basics Equalizing VFO Frequencies A=B Selecting ModeChanging Bands Fine Tuning Quick ChangesOperating Basics Changing Step SizesOperating Basics Direct Frequency Entry Front Panel MeterMeter on Selecting Transmit Power TransmittingTransmit Carrier Level Microphone GainMenu Setup What is a MENU?Menu Access Temporary Menu ResettingMenu Configuration Menu SetupMenu Item Function Selections Default LO/WIDTH and HI/SHIFT controlsM.CH/VFO.CH control Setting Baud Rate bps Stop Bits Cross Reference for Menu Functions Communicating SSB TransmissionSlow Scan TV/ Facsimile Sstv FrequenciesSwitching TX/RX Manually CW TransmissionCommunicating TX SIDETONE/ RX Pitch FrequencySetting Delay Time Communicating Semi BREAK-INFull BREAK-IN CW Reverse ReceiveFunction Default Communicating Electronic KeyerActivity Consult KEY Speed controlMultiple-Button Functions Emulation OptionsStoring CW Messages CW Message PlaybackInquiry Command Description Erasing CW MessagesInquiry Functions To check an Inquiry function Press CH 3+CHFunction Commands Press CH 1+CHSerial Number Options Embedded FunctionsOption d Leading Other Nines FM Transmission FM Repeater OperationPress RX B or RX a Press RX a or RX BContinuous or Burst Subtones? Selecting Subtone FrequencyArrl 10-METER Band Plan Digital Operation AM TransmissionRtty Frequency Shift Keying ERROR-CHECKING Modes AMTOR/ PACKET/ PACTOR/ G-TOR/ Clover Mode MeaningRtty Frequencies AmtorSPLIT-FREQUENCY Operation Packet FrequenciesCommunicating TF-SET Transmit Frequency SET Satellite OperationRIT Receive Incremental Tuning Operating AidsReceiving AGC Automatic Gain ControlXIT Transmit Incremental Tuning Operating AidsVOX VOICE-OPERATED Transmit Transmit InhibitMode Transmit Sampling Point Operating Aids Speech Processor SSB/AMChanging Frequency While Transmitting Transmit MonitorChanging Transmit Bandwidth Transmit BandshiftEqualizing Transmit Audio Microphone AGCAutomatic Mode Automatic Mode BoundariesUsing Automatic Mode Press MENU+Presetting Internal Tuner only Preset Bands for Internal TunerAutomatic Antenna Tuner Internal TunerCommunication Parameters Operating Aids AT-300 External Tuner OptionalMenu No Baud Rate Stop Bits Slope Tuning SSB/AM Rejecting InterferenceDSP Tools If Shift CWBeat Cancel SSB/AM Rejecting InterferenceAuto Notch SSB CW/FSK/FM Adaptive FiltersSetting Spac Time Noise BlankerAIP Advanced Intercept Point AttenuatorMemory Features Conventional or Quick MEMORY?Conventional Memory Memory Channel DataMemory Features Memory Channel RecallSplit-Frequency Channels Quick Channel SearchMemory Transfer Memory Channel ScrollTemporary Frequency Changes Memory \ VFO TransfersFull Reset Erasing Memory ChannelsChannel to Channel Transfers ChannelMemory Features Storing Scan Limits in CH Programmable VFO FunctionQuick Memory Storing Into Quick MemoryRecalling from Quick Memory Temporary Frequency ChangesScan Program ScanScan Hold Confirming START/END LimitsMemory Scan ScanBusy Frequency Stop ALL-CHANNEL ScanSetting Scan Speed Memory Channel LockoutMicroprocessor Reset Switching ANT 1/ ANTOperator Conveniences Programmable Function ButtonsBeep Function Operator Conveniences Assigning FunctionsAlarm Notification Setting UPDisplay Dimmer Quick Data TransferUsing Quick Transfer Operator ConveniencesConnections Transferring DataDRU-3 Digital Recording System Optional Recording MessagesMessage Playback Checking MessagesVS-2 Voice Synthesizer Optional Continuous MULTI-CHANNEL PlaybackAltering INTER-MESSAGE Interval Transmitting Messages Manual TX/RXMaintenance ServiceService Note CleaningMaintenance Internal AdjustmentsReference Frequency Calibration Troubleshooting Problem Symptom Probable Cause Corrective ActionPress LSB/USB, CW/-R,FSK/-R, or SWR Optional Accessories DRU-3PC-1A PG-2ZInstalling Options Removing the CaseVS-2 Voice Synthesizer Unit DRU-3 Digital Recording UnitInstalling Options SO-2 TEMPERATURE-COMPENSATED Crystal Oscillator TcxoSpecifications FSK, FMSpecifications FSK, AMAppendix a Learning about DSP Appendix B Propagation InformationNCDXF/IARU Beacon Network HF BeaconsFreq kHz Call Sign Appendix C General Coverage Receiver for SwlingAppendix D COM Connector Protocol CommandsCommand Description Hardware DescriptionParameter Description BAD Command ExamplesParameter Table Computer Control Commands Types of CommandsTerminator Subtone Table for Format NO.14Error Messages Command USE PrecautionsMenu Selection Table for EX COMMAND, Parameter ParameterMenu Menu Item Reading Command Tables Command TablesBusy ID Identification Set Mixer RA RF Attenuator XIT DSP DRSTOR AGC SstvFSK TOR Rtty SSB Sstv
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TS-870S specifications

The Kenwood TS-870S is a distinguished transceiver that stands out in the world of amateur radio, particularly for enthusiasts who seek a blend of advanced technology and user-friendly features. Introduced in the early 1990s, this HF transceiver quickly gained a reputation for its exceptional performance, versatility, and reliability, making it a favorite among operators worldwide.

One of the most noteworthy features of the TS-870S is its direct-sampling technology, which allows for superior signal fidelity and processing. This technology enables the transceiver to operate across a range of 160 meters to 10 meters, catering to both casual and serious operators. Its high-performance 16-bit digital signal processing (DSP) facilitates effective noise reduction and filtering capabilities, enhancing the overall clarity during transmission and reception.

In terms of power, the TS-870S boasts an output of 100 watts, providing ample power for various communication needs. The transceiver is equipped with an automatic antenna tuner, which simplifies the task of matching the antenna to the operating frequency, ensuring optimal performance without the hassle of manual adjustments.

Another significant aspect of the Kenwood TS-870S is its user interface, featuring a large, easy-to-read display, and a logically arranged control layout. This makes it accessible for both novice and experienced operators. The built-in memories allow for quick storage and access to favorite frequencies and settings, enhancing operational efficiency.

The Kenwood TS-870S also includes various advanced features such as an optional 2.4 kHz and 6 kHz roofing filter which provides improved performance in crowded band conditions. The receiver's dual VFOs (Variable Frequency Oscillators) enable simultaneous monitoring of two frequencies, which is particularly useful for operators who need to keep track of multiple signals or engage in cross-band communication.

Apart from its technical specifications, the TS-870S is constructed with durability in mind, ensuring that it can withstand the rigors of frequent use. It supports various operating modes, including SSB, CW, AM, and FM, making it a versatile choice for diverse amateur radio activities.

In conclusion, the Kenwood TS-870S combines advanced technology with user-friendly characteristics, offering amateur radio operators an exceptional tool for communication. With its innovative features, robust performance, and flexibility, it continues to be a respected choice among radio enthusiasts, solidifying its legacy in the realm of amateur radio.
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