The Kenwood SM-220 operating manual provides detailed instructions on setting up the device, including cabling requirements and preliminary instructions, and covers the operation of its monitor-scope, oscilloscope, and two-tone audio generator. Additionally, it includes troubleshooting guidance, specifying the meaning of notes, cautions, and warnings to prevent equipment damage or personal injury.
Manual Overview
The Kenwood SM-220 Station Monitor Scope is designed for use with TS-820 and TS-520 series transceivers, offering features like a monitor-scope, oscilloscope, and two-tone audio generator. For troubleshooting, the manual emphasizes the importance of saving packaging for transport and outlines the significance of various alerts: notes for minor inconveniences, cautions for potential equipment damage, and warnings for risks of personal injury. Calibration and adjustments can be made via the rear panel, including horizontal trace tilt. The unit supports waveform observation from 1.8 MHz to 54 MHz and features a high-sensitivity oscilloscope with a bandwidth of 2 Hz to 10 MHz. For diagnostics, the manual details cabling requirements for different operations, including RTTY tuning cross patterns, and provides guidance on using the Pan Display option. The manual also includes schematic diagrams and block diagrams for board-level troubleshooting and adjustments.
Quick Issues Covered
- Diagnose power-up failures with step-by-step troubleshooting guidance.
- Calibrate oscilloscope for accurate waveform measurements and adjustments.
- Use schematic diagrams for effective circuit tracing and fault isolation.
Overview
The Model SM-220 Station Monitor Scope is designed for use with TS-820 and TS-520 series SSB transceivers. It includes a monitor-scope, oscilloscope, and two-tone audio generator, with an optional Pan Display. The unit can display transmitted waveforms and features high sensitivity and wide bandwidth for waveform measurement.
Specifications
- CRT 75ARB31
- Colour: Blue – Green
- Frequency range: 1.8 ~ 150 MHz
- Maximum Power: 1.8 ~ 54 MHz 2 kW/PEP, 150 MHz (100 w/PEP)
- Insertion loss: Less than 0.9 dB (at only 144 MHz)
- Deflection sensitivity: More than 1 DIV at 2 W/PEP input
- Attenuator: 6 steps
- Frequency range (Trapezoid waveform observation): 1.8 ~ 30 MHz
- Maximum power at DRIVE terminal: 100 W/PEP
- SWR: 1.2 or less
- Oscillator frequency (Two-tone generator): 1,000 Hz, 1,575 Hz, or both, switchable
- Output Voltage (Two-tone generator): 5 mV/50 kf (at TWO TONE)
- Adaptor name (Pan Display): BS-5 (TS-520 series), BS-8 (TS-820 series)
- Input center frequency (Pan Display): 3,395 MHz (BS-5), 8.830 MHz (BS-8)
- TF frequency: 455 kHz
- IF bandwidth: More than 1 kHz (—6 dB)
- Input sensitivity: More than 20 dB »/DIV
- Scan Width: +20 kHz, +100 kHz, selectable
- Gain adjustment (Horizontal amplifier): 10 dB (Approximate)
- Deflection sensitivity (Horizontal amplifier): More than 300 mV/DIV
- Frequency response (Horizontal amplifier): DC-250 kHz or greater (EXT GAIN at MAX), DC-40 kHz (EXT GAIN at 1/2)
- Input resistance/capacity (Horizontal amplifier): 1 MQ (420%), 40 pF or less (SYNC switch at INT)
- Attenuator (Horizontal amplifier): Fully variable to O
- Max. input voltage (Horizontal amplifier): 100 Vp-p
- Sweep frequency: 10 Hz ~ 100 kHz (in 4 ranges, variable)
- Sweep linearity: Better than 5%
- SYNC SYSTEM: Synchronized sweep, internal negative sync and external sync
- Sync amplitude: Internal … More than 1 DIV on CRT, External … More than 2 Vp-p
- Deflection sensitivity (Vertical amplifier): More than 20 mV/DIV
- Frequency response (Vertical amplifier): 2 Hz ~ 10 MHz (—3 dB)
- Input resistance/capacity (Vertical amplifier): 1 MQ, 40 pF
- Overshoot: Less than 5%
- Attenuator (Vertical amplifier): 1,1/10, 1/100 and GND/MONITOR (Error between steps: 5% max.)
- Max. input voltage (Vertical amplifier): 300V (DC+ AC peak) or 600 Vp-p
- Power supply: AC117V +10%, 50/60 Hz, 20W
- Dimensions: 215(W) x 153(H) x 335(D) mm
- Weight: 5 kg
- Accessories supplied: Instruction book, UHF type cable, Tone generator output cable, Auxiliary feet (with screws), Power cable (fitted to unit), Spare fuse
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
The manual includes the following safety warnings/precautions:
1. Shipping Container: Save the boxes and packing materials in case the unit needs to be transported for remote operation, maintenance, or service.
2. Definitions:
– NOTE: If disregarded, inconvenience only – No risk of equipment damage or personal injury.
– CAUTION: Equipment damage may occur, but not personal injury.
– WARNING: Personal injury may occur – DO NOT DISREGARD!
Download MANUAL Operation manual (PDF – 2.9 MB)
Kenwood SM-220 Operating Manual: A 2.9 MB PDF guide for technicians to troubleshoot and calibrate the Kenwood SM-220 model.
- Brand: Kenwood-sm-220-operating
- Model: MANUAL
- Type: Operation manual
- File size: 2.9 MB
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
Download MANUAL operation manual (PDF)
Kenwood SM-220 Operating Manual Overview
The Kenwood SM-220 is a high-performance communication device designed for reliable and clear audio transmission in professional and amateur radio applications. This versatile unit provides users with advanced features to enhance signal clarity and operational efficiency, making it ideal for both casual and critical communication needs.
Main Features and Specifications
- Frequency Range: 144 MHz to 148 MHz
- Output Power: Up to 50 Watts
- Multiple Channel Memory Storage
- Adjustable Squelch Control for Noise Reduction
- Built-in Noise Blanker and Automatic Gain Control (AGC)
- LCD Display with Backlight for Easy Operation
- Compact and Durable Design Suitable for Field Use
Basic Usage and Operation Tips
To begin using the Kenwood SM-220, power on the device and select the desired frequency or channel using the tuning dial or memory presets. Adjust the squelch control to minimize background noise without cutting off weak signals. Use the microphone to transmit your message clearly, and monitor incoming signals through the speaker or an external headset. Regularly check battery levels or power connections to ensure uninterrupted operation.
Troubleshooting and Maintenance
If you experience poor audio quality or intermittent signals, verify antenna connections and ensure the device is within the recommended operating range. Clean the microphone and speaker grills periodically to prevent dust buildup. For persistent issues, consult the troubleshooting section of the manual to identify common faults such as power supply problems or internal component failures. Always use authorized accessories and replacement parts to maintain optimal performance.
Safety Reminder
Always operate the Kenwood SM-220 in accordance with local communication regulations and guidelines. Avoid using the device near flammable materials or in explosive atmospheres. Ensure proper grounding of the antenna system to prevent electrical hazards. Disconnect the device from power sources before performing any maintenance or repairs to reduce the risk of electric shock.