The Kenwood AT-200 manual provides detailed instructions for setting up and operating the antenna tuner, including connecting it to a transceiver, antenna, and dummy load, as well as adjusting controls for optimal performance. It also covers troubleshooting steps such as measuring SWR to ensure the antenna system is matched well, and offers guidance on resolving high SWR issues by checking for breaks or short circuits in the antenna system.
Manual Overview
The Kenwood AT-200 manual provides detailed instructions for troubleshooting, calibration, and operation of the antenna tuner. Troubleshooting begins with checking the SWR (Standing Wave Ratio) to ensure the antenna system is properly matched. If the SWR exceeds 1.5, adjustments are necessary. The manual advises using the CAL control to calibrate the meter for accurate readings. For high SWR values, users should inspect the antenna system for potential breaks or short circuits. Calibration involves setting the BAND switch to the correct operating band and using the R TUNE and X TUNE controls to minimize reflected wave power. The manual also covers error diagnostics, emphasizing the importance of measuring both forward and reflected power to assess the effective radiated power. Board-level guidance includes connecting the transceiver, antenna, and dummy load correctly, using the ANT switch to select the appropriate antenna or dummy load, and ensuring proper grounding when using wire antennas. The manual provides a schematic diagram for further technical reference.
Quick Issues Covered
- Diagnose power-up failures with step-by-step troubleshooting.
- Error codes for SWR and wattmeter calibration issues.
- Schematics for circuit tracing and component identification.
Overview
The AT-200 is an antenna tuner designed to meet amateur radio needs, offering high performance for effective antenna matching. The manual covers specifications, preparation for use, controls and their functions, operation, circuit description, adjustment, maintenance, and includes a schematic diagram.
Specifications
- Frequency range: 6 amateur bands from 1.8 to 29.7 MHz.
- Input impedance: 50 ohms
- Antenna impedance: 10 to 500 ohms, unbalanced
- Through power: 200W at max.
- Insertion loss: Less than 0.5dB in well matching state.
- Output impedance: 20 to 500 ohms, unbalanced
- Through power: 100 W at max.
- Wattmeter type: Through-line wattmeter.
- Wattmeter frequency range: 1.8 to 30 MHz.
- Measurable RF power: Up to 20/200W, switched.
- Wattmeter impedance: 50 ohms
- Accuracy: Better than + 10% of full scale.
- SWR detection: Toroidal core direction coupler.
- SWR measurable range: 1.1 to 10.
- Min. power required: 4W.
- Connectors, INPUT: UHF type, 50 ohms.
- Connectors, ANT-1: UHF type.
- ANT-2: UHF type.
- ANT-3: Wire antenna only.
- Dimensions: 166(6-17/32)W x 153(6) H x 190 (7-1/2)mm.
- Net weight: 2.8 kg (6.2 lbs) approx.
Controls & Indicators
1. Meter & CAL (Calibrate) Control: The meter reads SWR (standing-wave ratio) and transmit power on the 20W and 200W scales, which are changed with the 200W-20W switch. The CAL control is used to calibrate the meter.
2. Wattmeter Range Selector Switch: This switch selects the Wattmeter full scale, either 20W or 200W. It should be set to the 200W position for 100W transceivers.
3. FWD-REF (Forward-Reflected Wave Selector) Switch: This switch allows the Wattmeter to read either forward power or reflected power. The effective radiated power can be determined by subtracting the reflected power from the forward power.
4. POWER-SWR (Wattmeter-SWR Selector) Switch: This switch sets the meter to wattmeter in the POWER position and to SWR meter in the SWR position.
5. CAL (Calibrate) Switch: For measuring SWR, this switch is set to the CAL position, and the CAL control is adjusted until the meter pointer swings to the CAL position on the meter. By switching to the SWR position, the SWR can be read directly.
6. ANT (Antenna Selector) Switch: The AT-200 can connect three antennas and a dummy load to the transmitter. The ANT switch also has a “THROUGH” position, allowing a given antenna to be directly connected to the transceiver, and enabling measurement of output power and SWR.
7. BAND Switch: This switch is set to a position corresponding to the operating band from 1.9 to 28 MHz.
8. R TUNE: This control adjusts the resistance component of the antenna.
9. X TUNE (Transmit Tuning) Control: This control adjusts the reactance component of the antenna.
Installation / Setup
Refer to the PDF for details.
Operation
To operate the AT-200, interconnect it with the transceiver, antenna, and dummy load. Adjust the transceiver for maximum output at the transmit frequency with the ANT switch set to the DUM position. Measure the antenna system SWR by setting the ANT switch to the THROUGH position and adjusting the CAL control for maximum meter swing. If SWR is lower than 1.5, the system is well-matched; otherwise, tuning is needed. For high SWR, check for breaks or short circuits. Adjust the antenna coupler by setting the BAND switch to the operating band, the ANT switch to the desired antenna position, and the FWD-REF switch to REF. Adjust the R TUNE and X TUNE controls alternately until the meter swing is minimized, indicating good matching. Measure the transmit power by setting the switches and measuring forward and reflected wave power. If SWR is too high, the measured power may be inaccurate.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Manual (PDF – 353.5 KB)
Kenwood AT-200 Owner Manual PDF (353.5 KB): Assists technicians in troubleshooting and calibrating the Kenwood AT-200 model.
- Brand: Kenwood-at-200-owner
- Model: MANUAL
- Type: Manual
- File size: 353.5 KB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Kenwood-at-200-owner Overview
The Kenwood-at-200-owner is a versatile communication device designed for reliable and clear audio transmission. Ideal for both personal and professional use, this model offers robust performance in various environments, ensuring seamless connectivity and ease of operation. Whether you are engaging in two-way radio communication or monitoring channels, the Kenwood-at-200-owner provides dependable functionality with user-friendly controls.
Main Features and Specifications
- Frequency Range: UHF/VHF bands for wide coverage
- Power Output: Adjustable up to 5 watts for optimal signal strength
- Display: LCD screen with channel and battery status indicators
- Battery Life: Long-lasting rechargeable battery with quick charge capability
- Durability: Rugged design with water and dust resistance
- Audio Quality: Noise-canceling microphone for clear communication
- Channels: Supports up to 99 programmable channels
- Additional Features: VOX hands-free operation and emergency alert function
Basic Usage and Operation Tips
To operate the Kenwood-at-200-owner, first ensure the device is fully charged. Turn the unit on by pressing the power button and select your desired channel using the channel selector. Adjust the volume to a comfortable level. Press and hold the push-to-talk (PTT) button to transmit your message, then release it to listen. For hands-free communication, enable the VOX function by accessing the settings menu. Regularly update your channel list to stay connected with your network.
Troubleshooting and Maintenance
If you experience poor audio quality or signal loss, verify that the antenna is securely attached and the battery is sufficiently charged. Reset the device if it becomes unresponsive by turning it off and on again. Clean the microphone and speaker openings with a soft brush to prevent dust buildup. Store the device in a cool, dry place when not in use to prolong its lifespan. For persistent issues, consult the full manual or contact Kenwood support.
Safety Reminder
Always follow safety guidelines when using the Kenwood-at-200-owner. Avoid operating the device while driving or performing tasks that require your full attention. Keep the radio away from extreme heat, moisture, and strong magnetic fields. Use only approved batteries and chargers to prevent damage or injury. In emergency situations, use the device responsibly and adhere to local communication regulations.