Introduction to the Radio Shack Pro-649
The Radio Shack Pro-649 is a portable, handheld scanner designed to provide wide-ranging communication monitoring. Its compact form factor, combined with a robust set of features, makes it suitable for various applications, including public safety, aviation, marine, and amateur radio listening. The device is known for its intuitive interface, extensive frequency coverage, and advanced scanning features, making it a popular choice among radio enthusiasts.
Physical and Design Specifications
Understanding the physical aspects of the Pro-649 helps users appreciate its portability and ease of use.
Dimensions and Weight
- Dimensions: Approximately 2.4 inches x 4.8 inches x 1.2 inches (6.1 x 12.2 x 3 cm)
- Weight: About 8 ounces (227 grams)
This compact size allows for easy handling and portability, making it suitable for field operations and casual listening.
Build and Display
- Material: Durable plastic casing with rubberized grip accents
- Display: Backlit LCD screen
- Size: Approximately 1.5 inches diagonally
- Resolution: Clear alphanumeric characters with backlight for low-light conditions
- Controls: Physical keypad including numeric, function, scan, hold, and navigation buttons
Frequency Coverage and Tuning Capabilities
One of the most critical specifications for any scanner is its frequency coverage and tuning flexibility.
Frequency Range
The Pro-649 covers a wide spectrum of radio frequencies, enabling users to monitor various communication channels:
- VHF Low Band: 30 MHz to 50 MHz
- VHF High Band: 138 MHz to 174 MHz
- UHF Band: 406 MHz to 512 MHz
- Airband: 108 MHz to 137 MHz (aviation communications)
- Public Safety and Emergency Services: 30 MHz to 512 MHz (with some regional variations)
- Business and Marine Frequencies: Included within the above ranges, depending on regional licensing and restrictions
This extensive coverage allows for monitoring of police, fire, EMS, air traffic, marine, and amateur radio transmissions.
Tuning Resolution and Modes
- Tuning Steps: Selectable in 5 kHz, 6.25 kHz, 8.33 kHz, 10 kHz, 12.5 kHz, 20 kHz, 25 kHz, and 50 kHz increments
- Tuning Method: Manual tuning, search, and scan modes
- Frequency Storage: Capable of storing up to 200 channels for quick access
Scanning and Search Features
The Pro-649 provides advanced scanning features to enhance listening efficiency.
Scanning Modes
- Standard Scan: Sequentially scans stored channels
- Priority Scan: Monitors priority channels periodically
- Search Mode: Rapidly searches through a specified frequency range to locate active transmissions
Search Capabilities
- Search Speed: Approximately 50 channels per second
- Search Types:
- Open Search: Scans all frequencies within the selected range
- Close Call Search: Detects nearby active frequencies (if supported)
- Skip and Lockout: Ability to skip certain frequencies or lock out inactive channels to streamline scanning
Channel and Frequency Management
- Channel Grouping: Allows users to organize channels into groups for easier navigation
- Memory Backup: Stores programmed channels even without power, thanks to internal batteries or memory retention features
Audio and Signal Processing
Audio output quality and signal processing capabilities are vital for clear reception.
Speaker and Audio Output
- Built-in Speaker: 0.5-watt speaker for audio playback
- Headphone Jack: 3.5mm stereo jack for private listening
- Audio Controls: Volume adjustment and squelch control for noise reduction
Signal Processing Features
- Squelch Control: Adjustable to suppress background noise and improve audio clarity
- RF Gain Control: Allows users to adjust the sensitivity of the receiver to reduce interference or enhance weak signals
Power Supply and Battery Life
Portability is a key feature of the Pro-649, and its power options are designed for extended use.
Power Sources
- Batteries: 4 x AA alkaline batteries (standard)
- Optional: Rechargeable NiMH battery pack (sold separately)
- Power Consumption: Approximately 150-200 mA during active operation
Battery Life
- Under typical conditions, the device can operate for 10-15 hours on a fresh set of batteries, depending on usage and backlight settings.
Additional Features and Specifications
Beyond the core features, the Pro-649 includes several advanced specifications that enhance its usability.
Programming and User Interface
- Programming Method: Manual entry or via PC programming with compatible software
- User Interface: Simple menu-driven system with on-screen prompts
- Memory Management: Up to 200 channels, with customizable labels
Connectivity and Compatibility
- Antenna: External telescopic antenna included
- Data Interface: Limited; primarily designed for manual tuning and programming
- Compatibility: Compatible with various accessories for extended range and functionality
Environmental and Durability Specifications
- Operating Temperature: -20°C to +60°C (-4°F to +140°F)
- Water Resistance: Not waterproof; suitable for dry environments
- Shock Resistance: Built to withstand everyday handling, but not ruggedized for heavy-duty use
Performance Metrics
The overall performance of the Pro-649 can be summarized with key metrics:
- Sensitivity: High sensitivity across all frequency ranges, capable of receiving weak signals
- Selectivity: Good selectivity with adjustable filters to minimize interference
- Intermodulation Rejection: Effective filtering to reduce image and out-of-band signals
- Frequency Stability: Maintains stable tuning over temperature variations and operation time
Summary of Radio Shack Pro-649 Specs in a Tabular Format
| Specification | Details |
|-----------------|---------|
| Frequency Range | 30 MHz – 512 MHz (varies by band) |
| Tuning Steps | 5 kHz to 50 kHz (selectable) |
| Storage Channels | 200 channels |
| Display | Backlit LCD, 1.5-inch diagonal |
| Power | 4 x AA batteries / NiMH pack (optional) |
| Power Consumption | ~150-200 mA |
| Weight | ~8 ounces (227 grams) |
| Dimensions | 2.4" x 4.8" x 1.2" |
| Audio Output | Built-in speaker, 3.5mm headphone jack |
| Operating Temperature | -20°C to +60°C |
| Additional Features | Priority scan, search modes, lockout, programming options |
Conclusion
The Radio Shack Pro-649 specs reveal a versatile and capable handheld scanner tailored for a wide range of radio monitoring needs. Its extensive frequency coverage, customizable tuning options, and user-friendly features make it an excellent choice for hobbyists, emergency responders, and professionals alike. Whether you're interested in monitoring public safety channels, aviation communications, marine frequencies, or amateur radio bands, the Pro-649 offers robust performance packed into a compact device.
By understanding the detailed specifications outlined above, users can better evaluate how the Pro-649 fits their specific requirements and optimize their listening experience. Its combination of broad coverage, advanced features, and portability ensures that it remains a valuable tool in the realm of radio scanning technology.
Frequently Asked Questions
What are the key specifications of the Radio Shack Pro-649 scanner?
The Radio Shack Pro-649 features a wide frequency range of 25-512 MHz, 200 channels, and offers both local and trunk tracking capabilities with digital and analog modes.
Does the Radio Shack Pro-649 support digital trunk tracking?
Yes, the Pro-649 supports digital trunk tracking in addition to analog, allowing users to monitor a variety of digital radio systems.
What type of antennas are compatible with the Radio Shack Pro-649?
The Pro-649 is compatible with standard rubber duck antennas, external telescopic antennas, and other compatible antennas designed for multi-band scanning.
Can the Radio Shack Pro-649 scan multiple frequency bands simultaneously?
Yes, the Pro-649 allows for scanning across multiple frequency bands including VHF, UHF, and 800 MHz bands simultaneously.
What are the power options for the Radio Shack Pro-649?
The scanner is powered by 4 AA batteries or an optional AC adapter, providing flexible power options for portability and home use.
Does the Radio Shack Pro-649 have memory backups or storage capabilities?
Yes, it can store up to 200 channels, allowing users to program and quickly access frequently monitored frequencies.
Is the Radio Shack Pro-649 suitable for monitoring public safety and emergency services?
Yes, with its extensive frequency coverage and trunk tracking features, the Pro-649 is suitable for monitoring police, fire, and emergency service communications.
What are the physical dimensions and weight of the Radio Shack Pro-649?
The Pro-649 measures approximately 8 x 2 x 1 inches and weighs around 1 pound, making it portable and easy to carry.
