Kenwood TS-940SAT Manual

The Kenwood TS-940SAT is a high-performance amateur radio transceiver featuring all-mode operation (SSB, CW, AM, FM), 100W output power, built-in antenna tuner, general coverage receiver (100kHz-30MHz), digital frequency display, memory channels, IF shift, noise blanker, and comprehensive filtering options. Below are key sections for operation, features, installation, setup, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Functions 6. Operating Modes 7. Memory Operations 8. Antenna System 9. Maintenance & Care 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Main transceiver unit, built-in antenna tuner, microphone connector, antenna ports, power connector, accessory ports.

Feature	Description
Frequency Coverage	Receive: 100kHz-30MHz; Transmit: Amateur bands 1.8-30MHz
Output Power	100W PEP (SSB), 100W (CW), 40W (AM), 25W (FM)
Modes	SSB, CW, AM, FM, FSK
Antenna Tuner	Built-in automatic antenna tuner
Memory Channels	20 programmable memory channels
IF Shift	Adjustable IF shift for interference reduction
Noise Blanker	Effective pulse noise reduction
Filters	Selectable IF filters for SSB/CW/AM
Power Requirements	13.8V DC, 22A max
Display	Digital frequency display with S/RF meters

Installation

Unpack and inspect contents. Place on stable surface with adequate ventilation.

Connect power supply: Use heavy gauge wire to 13.8V DC source, observing polarity.
Connect antenna: Use coaxial cable to ANT connector; ensure proper impedance matching.
Connect microphone: Use compatible microphone to MIC connector.
Connect accessories: Optional external speakers, keyers, or computer interfaces.
Grounding: Connect chassis ground for safety and noise reduction.

WARNING! Ensure proper ventilation; do not block cooling vents. Use appropriate fusing.

First-Time Setup

Power on transceiver; initialize settings.

Set operating frequency: Use main tuning dial or keypad entry.
Select mode: Choose SSB, CW, AM, or FM as required.
Adjust audio: Set AF gain and speaker volume.
Configure filters: Select appropriate IF filter for current mode.
Set RF power: Adjust output power for current operation.
Program memories: Store frequently used frequencies and settings.

CAUTION! Verify antenna connection before transmitting. Start with low power.

Specifications

Frequency Range: RX: 100kHz-30MHz; TX: 1.8-30MHz (amateur bands)
Power Output: 100W PEP (SSB), 100W (CW), 40W (AM), 25W (FM)
Sensitivity: SSB/CW: 0.25μV; AM: 1.0μV; FM: 0.5μV
Selectivity: SSB: 2.4kHz; CW: 500Hz; AM: 6kHz; FM: 15kHz
Antenna Impedance: 50 ohms unbalanced
Power Supply: 13.8V DC ±15%, 22A max
Dimensions: 140H × 430W × 380D mm
Weight: Approx. 15 kg
Temperature Range: -10°C to +50°C operating

Controls and Functions

Front Panel: POWER, MODE selection, FILTER selection, AF/RF gain, AGC, NB, IF SHIFT, VOX, RIT, memory controls.

Main Controls: Tuning dial, mode buttons, filter buttons, function keys, meter selection.

Audio: AF gain, speaker volume, monitor level, VOX controls. Receive: RF gain, AGC (fast/slow), noise blanker, IF shift, RIT/XIT. Transmit: MIC gain, power output, speech processor, VOX delay. Memory: 20 channels with full parameter storage.

Operating Modes

SSB (USB/LSB), CW, AM, FM, FSK operation procedures.

SSB Operation: Select USB/LSB, set filters, adjust RF/AF gain.
CW Operation: Select CW mode, set narrow filters, adjust keyer speed.
AM Operation: Select AM mode, use wider filters for broadcast reception.
FM Operation: Select FM mode for local VHF-like operation.
FSK Operation: For RTTY and data communications.

Tip: Use appropriate filters for each mode to optimize performance.

Memory Operations

20 memory channels store frequency, mode, filter, and other settings.

Store memory: Tune to desired frequency and settings, press MEMORY WRITE.
Recall memory: Press MEMORY button and select channel number.
Memory scan: Automatically scan through programmed memory channels.
Memory clear: Erase unwanted memory channels individually or all at once.
Memory lock: Prevent accidental modification of stored memories.

WARNING! Backup important frequencies; memory contents may be lost during service.

Antenna System

Built-in automatic antenna tuner matches 50-200 ohm loads. Manual tuner controls available.

Maintenance & Care

Keep unit clean and dry. Periodically check connections and cooling system.

CAUTION! Disconnect power before cleaning. Use only approved service centers for internal repairs.

Regulatory Information

FCC Part 97: Complies with amateur radio service rules. CE compliant for European markets. For technical support and service, contact authorized Kenwood service centers. Manufactured by Trio-Kenwood Communications.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power supply/fuses	Check DC power connection; verify fuses; check polarity.
No transmit	Settings/connections	Verify mode selection; check microphone; ensure PTT operation.
Poor reception	Antenna/tuning	Check antenna connections; verify antenna tuner setting; adjust RF gain.
Memory loss	Backup battery	Replace internal backup battery; reprogram memories.
Overheating	Ventilation/power	Ensure adequate ventilation; reduce power output; check duty cycle.

Reset: Power cycle unit; factory reset available via service menu.

Service: Contact authorized Kenwood service centers for technical support.