Why are received signals unintelligible on my Kenwood TS-870?
If the received signals are totally unintelligible on your Kenwood Transceiver, it is likely that the wrong modulation mode is selected. Press [LSB/USB], [CW/-R], [FSK/-R], or [FM/AM] to select the correct modulation mode.
Why is SSB audio quality poor on my Kenwood Transceiver?
If the SSB audio quality on your Kenwood Transceiver is very poor, and the high or low audio frequencies are absent, it may be due to: 1. The filter for Digital operation being selected. Switch Menu No. 19 (PKT.FIL) to OFF. 2. The LO/WIDTH control or HI/SHIFT control being set incorrectly. Turn the LO/WIDTH control counterclockwise and the HI/SHIFT control clockwise.
Why is my Kenwood TS-870 not responding correctly to button presses?
If your Kenwood Transceiver does not respond correctly after you press button or key combinations, or turn controls per instructions, the following could be the reason: 1. Procedures are not being followed precisely. Review "WRITING CONVENTIONS FOLLOWED". 2. The Lock function is ON. Press [F.LOCK] to turn OFF the Lock function. 3. The microprocessor and its memory need resetting. Review "MICROPROCESSOR RESET". After understanding what data will be lost, do a Partial Reset. If the problem remains, do a Full Reset.
Why does my Kenwood Transceiver have low transmit power?
If your Kenwood Transceiver exhibits low transmit power, it could be due to: 1. The MIC gain control and/or CAR control being set too low. Increase the MIC gain control and/or CAR control clockwise depending on the mode being used. Review the appropriate section of the "COMMUNICATING" chapter for the mode being used. 2. Poor antenna system connections causing high SWR. Check antenna connections. Confirm that the antenna tuner is reporting a low SWR.
Why can't I transmit with my Kenwood TS-870?
If you cannot transmit using your Kenwood Transceiver even when you press [PTT], or transmissions result in no contacts, consider the following: 1. The microphone plug is not fully inserted into the Front Panel connector. Turn OFF the power, ensure the microphone connector on the Front Panel has no foreign objects in it, then plug in the microphone connector. Secure the connector with the locking ring. 2. The Transmit Inhibit function is ON. Switch Menu No. 27 (TX INH) to OFF. 3. You have selected CW or FSK instead of a voice mode. Press [LSB/USB] or [FM/AM] to select a voice mode. 4. The filter for Digital operation is selected. Switch Menu No. 19 (PKT.FIL) to OFF. 5. The wrong antenna connector (ANT 1/2) is selected. Press [ANT] to select the other antenna connector.
What to do if Kenwood Transceiver does not function normally after switching on?
If your Kenwood Transceiver does not function normally after switching on the power, for example, no digits or incorrect digits appear on the Display, here are some possible causes: 1. The input voltage is outside 13.8 V DC ±15% (11.7 to 15.8 V DC). Correct the input voltage. Use a step-up transformer, if necessary, to raise the input line voltage to the DC power supply. Or, use a 12 to 16 V battery. 2. The microprocessor has malfunctioned. Review "MICROPROCESSOR RESET". After understanding what data will be lost, do a Partial Reset. If the problem remains, do a Full Reset.
What to do if Kenwood TS-870 Transceiver has poor receive sensitivity and S-meter is full scale?
If your Kenwood Transceiver is not receiving signals or the receive sensitivity seems poor, and the S-meter is reading full scale, it could be due to the RF gain control being set too low. To resolve this, turn the RF gain control fully clockwise.
General| Frequency Range Receive | 0.1-30 MHz |
|---|---|
| Receiver Type | Double conversion superheterodyne |
| Antenna Impedance | 50 ohms |
| Power Supply | 13.8 V DC ±15% |
| Receiver Sensitivity AM | 2 µV (10 dB S/N) |
| IF Bandwidth SSB | 2.4 kHz |
| IF Bandwidth CW | 500 Hz |
| IF Bandwidth AM | 6 kHz |
| Modes | SSB, CW, AM |
| RF Output Power | 100 W |
| RF Power Output AM | 25 W |
| Current Consumption | 20.5 A (transmit) |
| Receiver Sensitivity SSB/CW | 0.16 µV (10 dB S/N) |
| Image Rejection | >70 dB |
| IF Bandwidth FM | 15 kHz |
Describes potential interference and user modification consequences.
Details FCC compliance for digital devices and interference mitigation.
Warnings about potential electrical shock hazards.
Importance and method of establishing a good ground connection.
Conditions that necessitate professional repair.
Adjusting passband for interference reduction.
Shifting the receiver's IF frequency.
Adjusting the width of the receive passband.
Explains the benefits of Digital Signal Processing.
Highlights key capabilities and functions of the TS-870S.
Guidance on connecting antennas for optimal performance.
Importance and method of establishing a good ground connection.
Instructions for connecting the required DC power supply.
Details on connecting various accessories.
Description of front panel controls and connectors.
Description of rear panel connectors and ports.
Connecting a computer for transceiver control.
Connecting RTTY equipment for digital modes.
Connecting an external antenna tuner.
Connecting TNC, MCP, or other digital mode equipment.
A simplified guide to basic operation for a first contact.
Steps for setting up and listening to signals.
Basic steps for making a transmission.
Overview and description of front panel controls.
Continued description of front panel controls.
Description of the microphone and its controls.
Description of rear panel connectors.
Explanation of front panel indicators and display elements.
How to turn the transceiver on and off.
Explanation of the two independent VFOs.
Copying frequency data between VFOs.
Changing the operating mode (SSB, CW, FM, etc.).
Moving through frequencies quickly.
Precise frequency tuning.
Entering frequencies directly via keypad.
Explanation of the multifunction meter.
Methods for transmitting signals.
Adjusting output power.
Introduction to the transceiver's menu system.
Procedure for accessing and navigating menu items.
Customizing a quick access menu.
Detailed table of menu items and functions.
Table to locate menu functions by subject.
How to transmit using Single Sideband.
Operating SSTV and FAX modes.
How to transmit using Morse code.
Matching transmit and receive frequencies.
Transmit/receive switching for CW.
Transmit/receive switching for CW.
Features and operation of the built-in keyer.
Using keyer functions with button combinations.
Mimicking other keyer timing characteristics.
Saving messages in memory.
Playing back stored CW messages.
Deleting stored CW messages.
Checking the current state of the keyer.
Entering commands for keyer functions.
Embedding functions within messages.
Configuring serial number sending.
How to transmit using FM mode.
Using repeaters for FM communication.
Setting CTCSS frequencies for repeaters.
How to transmit using AM mode.
Overview of digital modes.
Operating RTTY using FSK.
Using digital modes with error correction.
Operating with separate transmit and receive frequencies.
Checking transmit frequency without changing receive.
Improving receive performance.
Adjusting receive frequency without affecting transmit.
Managing receiver gain automatically or manually.
Information on transmitting functions.
Adjusting transmit frequency without affecting receive.
Enhancing voice quality for transmission.
Listening to your own transmitted signal.
Tailoring transmitted signal quality.
Adjusting signal bandwidth.
Automatically selecting mode based on frequency.
Setting frequency boundaries for mode changes.
Using the internal or external antenna tuner.
Storing tuner settings for quick recall.
Installation and use of the AT-300 tuner.
Connecting and controlling the transceiver via computer.
Overview of Digital Signal Processing features.
Adjusting passband edges to reduce interference.
Adjusting the width of the receive passband.
Automatically removing interfering tones.
Reducing unwanted noise in the signal.
Reducing pulse noise.
Battery backup for memory.
Storing data in conventional memory channels.
Storing split-frequency settings.
Retrieving stored memory data.
Searching programmed or vacant channels.
Temporarily changing frequency without altering stored data.
Reviewing memory channels without changing receive frequency.
Transferring data between memory channels and VFOs.
Deleting data from memory channels.
Resetting all parameters to factory defaults.
Saving scan start and end frequencies.
Restricting tuning within programmed frequency range.
Using quick memory for temporary storage.
Saving current VFO data to quick memory.
Retrieving quick memory data.
Scanning between programmed start/end frequencies.
Temporarily stopping scan.
Scanning through memory channels.
Automatically stopping scan on busy channel.
Scanning all memory channels.
Scanning a selected group of memory channels.
Skipping specific memory channels during scan.
Adjusting the scan speed.
Initializing the transceiver and memory.
Resetting all parameters to factory defaults.
Selecting the active antenna.
Customizing programmable function buttons.
Disabling buttons to prevent accidental changes.
Transferring data between transceivers.
Using the digital recording unit.
Playing back recorded messages.
Using the voice synthesizer unit.
Playing back multiple messages sequentially.
Procedures for returning equipment for repair.
Instructions for cleaning the transceiver.
Procedures for internal adjustments.
Calibrating the transceiver's frequency.
Common problems and their solutions.
External antenna tuner.
Optional digital recording unit.
Optional voice synthesizer unit.
How to open the transceiver case.
Installing the DRU-3 unit.
Installing the VS-2 unit.
Installing the SO-2 TCXO unit.
Transmitter specifications.
General transceiver specifications.
Receiver specifications.
Explains DSP features and benefits.
Information on radio wave propagation.
Information on propagation beacon network.
Using the transceiver for shortwave listening.
Details on computer interface protocol.
Explanation of command syntax.
Explanation of command parameters.
Table detailing command parameters.
Classification of computer commands.
Library of commands for computer control.
Detailed tables for computer commands.
How to interpret command tables.
More detailed command tables.
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