Kenwood TS-870S instruction manual AM Transmission, Digital Operation, Rtty Frequency Shift Keying

Page 46

6 COMMUNICATING

AM TRANSMISSION

Each mode used on the HF Amateur bands has its own advantages. Although long distance DX contacts may be less common while using AM, the superior audio quality characteristic of AM operation is one reason why some prefer this mode.

When looking for others using AM, check the following frequencies first:

¥3885, 7290, 14286, 21390, and 29000~29200 kHz

Refer, if necessary, to ÒOPERATING BASICSÓ beginning on page 19 for complete receiving details for any mode.

1Select the operating frequency.

2Press [FM/AM] to select AM mode.

AGC AUTO

AM

3Select the ALC meter function by pressing [METER].

4Press and hold down the Microphone [PTT] switch, or press [SEND].

¥The ÒON AIRÓ indicator lights.

¥Refer to ÒVOXÓ {page 45} for information on automatic TX/RX switching.

5Without speaking, adjust the CAR control so that the ALC meter just begins to indicate.

6Speak into the microphone and adjust the MIC gain control so that only a few segments on the ALC meter light.

¥Speak in a normal tone and level of voice. Speaking too close to the microphone, or too loudly, may increase distortion and reduce intelligibility.

7If you want to use speech processing, press [PROC] to switch on the Speech Processor and adjust as described on page 46.

8Release the Microphone [PTT] switch, or press [SEND] again, to return to the receive mode.

¥The ÒON AIRÓ indicator goes out.

This completes the ÒAM TRANSMISSIONÓ section. Refer to ÒOPERATING AIDSÓ beginning on page 44 for information about additional useful functions for operating.

DIGITAL OPERATION

Since Multimode Communications Processors (MCP) have become popular, many Amateurs enjoy operating using a number of digital modes. The power and variety of Amateur radio increased greatly with the development of MCP that can use your TS-870S transceiver as the communications link.

For example, itÕs possible to take advantage of the camaraderie found on RTTY, then move to Packet to access an RBBS (Radio Bulletin Board System) to download a recent shareware program youÕve heard about, and then move again to AMTOR or PacTOR to deposit mail in a regional mailbox for forwarding. After that, you may switch to G-TORTMor Clover for a lightning fast file transfer with a friend.

Consult ACCESSORY CONNECTIONS {pages 5~7} before proceeding if you need installation information. It is assumed here that you have all hardware, and software if necessary, already correctly installed.

RTTY (FREQUENCY SHIFT KEYING)

Important Menu items to be aware of before beginning to operate RTTY include the following:

¥Menu No. 62 (FSK.SHFT): Selects 170, 200, 425, or 850 Hz shift. The 170 Hz shift default is used on the Amateur bands.

¥Menu No. 63 (MARK.POL): Allows reversal of the key-down polarity between mark and space. The default is space (OFF).

¥Menu No. 64 (FSK.TONE): Switches between a high tone (2125 Hz) and a low tone (1275 Hz). The default is 2125 Hz. The high tone is commonly used nowadays.

1Select the operating frequency.

2Press [FSK/–R]to select FSK mode.

AGC AUTO

FSK

3Select the ALC meter function by pressing [METER].

S

1

3

5

7

9

20

40

60

dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

25

50

 

100

 

 

 

0

 

 

FILTER

 

W

 

 

 

ALC

 

 

 

 

 

 

40

Page 45 Page 47
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Page 45 Page 47
Contents TS-870S Writing Conventions Followed Applicable ModelKEY2 Power Lines Power SourcesPower Cable Protection CleaningContents Rejecting Interference Memory FeaturesScan Installing Options MaintenanceOptional Accessories Specifications AppendicesSupplied Accessories DSP Maximum SIGNAL/ Minimum NoiseFeatures IntroductionAntenna Connection InstallationTransmission Line MHz 14 MHz 30 MHz Ground Connection DC Power Supply ConnectionInstallation Lightning ProtectionFront Panel Accessory ConnectionsRear Panel Linear Amplifier Remote Computer Interface COMRtty Equipment Rtty and ACC Pin FunctionAntenna Tuner AT Accessory Equipment ACCSM-230 Station Monitor if OUT PKS Pin No. Pin NameANO GND PSQ Smet PKDYour First QSO First QSO Front Panel Getting Acquainted@4QUICK Memo M.IN button 6KEY Speed control@5QUICK Memo MR button LSB/USB button @7Tuning controlEnter button CW/ÐR button#5TX EQ. button #3BEAT Cancel buttonRX M.CH button #6FILTER LO/WIDTH and HI/SHIFT controls$7M.CH/VFO.CH control Microphone$4RIT/XIT control UP/DWN buttonsRear Panel 1PROC Display0AUTO 2MONI8RIT 5MENU7SPLIT 9TONE#4FSK #2ON AIR#3AT Tune #7M.SCRAdjusting Squelch Switching Power ON/OFFAdjusting Volume Operating BasicsOperating Basics Equalizing VFO Frequencies A=B Selecting ModeChanging Bands Operating Basics Fine TuningQuick Changes Changing Step SizesOperating Basics Direct Frequency Entry Front Panel MeterMeter on Transmit Carrier Level Selecting Transmit PowerTransmitting Microphone GainMenu Access Menu SetupWhat is a MENU? Temporary Menu ResettingMenu Item Function Selections Default Menu ConfigurationMenu Setup LO/WIDTH and HI/SHIFT controlsM.CH/VFO.CH control Setting Baud Rate bps Stop Bits Cross Reference for Menu Functions Slow Scan TV/ Facsimile CommunicatingSSB Transmission Sstv FrequenciesCommunicating Switching TX/RX ManuallyCW Transmission TX SIDETONE/ RX Pitch FrequencyFull BREAK-IN Setting Delay TimeCommunicating Semi BREAK-IN CW Reverse ReceiveActivity Consult Function DefaultCommunicating Electronic Keyer KEY Speed controlMultiple-Button Functions Emulation OptionsStoring CW Messages CW Message PlaybackInquiry Functions Inquiry Command DescriptionErasing CW Messages To check an Inquiry function Press CH 3+CHFunction Commands Press CH 1+CHSerial Number Options Embedded FunctionsOption d Leading Other Nines Press RX B or RX a FM TransmissionFM Repeater Operation Press RX a or RX BContinuous or Burst Subtones? Selecting Subtone FrequencyArrl 10-METER Band Plan Digital Operation AM TransmissionRtty Frequency Shift Keying Rtty Frequencies ERROR-CHECKING Modes AMTOR/ PACKET/ PACTOR/ G-TOR/ CloverMode Meaning AmtorSPLIT-FREQUENCY Operation Packet FrequenciesCommunicating TF-SET Transmit Frequency SET Satellite OperationReceiving RIT Receive Incremental TuningOperating Aids AGC Automatic Gain ControlVOX VOICE-OPERATED Transmit XIT Transmit Incremental TuningOperating Aids Transmit InhibitChanging Frequency While Transmitting Mode Transmit Sampling PointOperating Aids Speech Processor SSB/AM Transmit MonitorEqualizing Transmit Audio Changing Transmit BandwidthTransmit Bandshift Microphone AGCUsing Automatic Mode Automatic ModeAutomatic Mode Boundaries Press MENU+Automatic Antenna Tuner Presetting Internal Tuner onlyPreset Bands for Internal Tuner Internal TunerCommunication Parameters Operating Aids AT-300 External Tuner OptionalMenu No Baud Rate Stop Bits DSP Tools Slope Tuning SSB/AMRejecting Interference If Shift CWAuto Notch SSB CW/FSK/FM Beat Cancel SSB/AMRejecting Interference Adaptive FiltersAIP Advanced Intercept Point Setting Spac TimeNoise Blanker AttenuatorConventional Memory Memory FeaturesConventional or Quick MEMORY? Memory Channel DataSplit-Frequency Channels Memory FeaturesMemory Channel Recall Quick Channel SearchTemporary Frequency Changes Memory TransferMemory Channel Scroll Memory \ VFO TransfersChannel to Channel Transfers Full ResetErasing Memory Channels ChannelMemory Features Storing Scan Limits in CH Programmable VFO FunctionRecalling from Quick Memory Quick MemoryStoring Into Quick Memory Temporary Frequency ChangesScan Hold ScanProgram Scan Confirming START/END LimitsBusy Frequency Stop Memory ScanScan ALL-CHANNEL ScanSetting Scan Speed Memory Channel LockoutOperator Conveniences Microprocessor ResetSwitching ANT 1/ ANT Programmable Function ButtonsBeep Function Operator Conveniences Assigning FunctionsDisplay Dimmer Alarm NotificationSetting UP Quick Data TransferConnections Using Quick TransferOperator Conveniences Transferring DataMessage Playback DRU-3 Digital Recording System OptionalRecording Messages Checking MessagesAltering INTER-MESSAGE Interval VS-2 Voice Synthesizer OptionalContinuous MULTI-CHANNEL Playback Transmitting Messages Manual TX/RXService Note MaintenanceService CleaningMaintenance Internal AdjustmentsReference Frequency Calibration Troubleshooting Problem Symptom Probable Cause Corrective ActionPress LSB/USB, CW/-R,FSK/-R, or SWR PC-1A Optional AccessoriesDRU-3 PG-2ZVS-2 Voice Synthesizer Unit Installing OptionsRemoving the Case DRU-3 Digital Recording UnitInstalling Options SO-2 TEMPERATURE-COMPENSATED Crystal Oscillator TcxoSpecifications FSK, FMSpecifications FSK, AMAppendix a Learning about DSP NCDXF/IARU Beacon Network Appendix B PropagationInformation HF BeaconsFreq kHz Call Sign Appendix C General Coverage Receiver for SwlingCommand Description Appendix D COM Connector ProtocolCommands Hardware DescriptionParameter Description BAD Command ExamplesParameter Table Terminator Computer Control CommandsTypes of Commands 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 FSK TOR AGCSstv 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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