Sharp Atomic Clocks offer unparalleled accuracy, automatically synchronizing with the official time signal for precise timekeeping. These clocks eliminate manual adjustments!
Atomic technology ensures your Sharp clock displays the correct time, year after year, simplifying daily life with reliable, hassle-free operation.
This manual guides you through setup, features, and troubleshooting, maximizing your Sharp Atomic Clock experience, offering convenience and precision.
What is an Atomic Clock?
Atomic clocks aren’t powered by radioactive materials, despite the name! They utilize the natural vibration frequencies of atomic particles – specifically cesium – as a remarkably stable time base.
The National Institute of Standards and Technology (NIST) maintains a primary atomic clock, broadcasting a time signal via the WWVB radio station.
Sharp Atomic Clocks, and other radio-controlled clocks, receive this WWVB signal, automatically setting and updating the time. This eliminates the need for manual adjustments, ensuring exceptional accuracy.
Essentially, your Sharp clock is constantly referencing a highly precise, national standard, providing reliable timekeeping without drift or error. It’s a modern marvel of engineering!
Why Choose a Sharp Atomic Clock?
Sharp Atomic Clocks deliver unmatched accuracy, automatically synchronizing with the NIST’s WWVB signal, eliminating manual time setting. Forget about daylight saving time adjustments – they happen automatically!
These clocks boast a clear, easy-to-read display, often with jumbo numbers, making time visible from across the room. Many models also include indoor/outdoor temperature readings.
Sharp prioritizes user convenience, offering features like adjustable brightness and reliable alarm functions. Investing in a Sharp Atomic Clock means investing in precision, convenience, and long-term reliability.
Enjoy peace of mind knowing your clock is always displaying the correct time, effortlessly!

Understanding Your Sharp Atomic Clock Model
Sharp offers diverse SPC series clocks with unique features. Identifying your specific model is crucial for accessing tailored instructions and maximizing functionality.
Identifying Your Model Number (SPC Series)
Locating your Sharp Atomic Clock’s model number is the first step to understanding its specific capabilities. The model number, beginning with “SPC,” is typically found on the original packaging, often near the barcode;
Alternatively, carefully inspect the back or bottom of the clock itself; a label should be affixed displaying the model number (e.g., SPC1107EL). This identifier is essential when accessing detailed support resources, downloading the correct user manual, or contacting customer service.
Knowing your model ensures you receive accurate guidance for setup, troubleshooting, and utilizing all available features. Refer to this number throughout this manual for clarity.
Key Features and Benefits
Sharp Atomic Clocks boast several exceptional features designed for convenience and accuracy. Automatic time synchronization via the WWVB signal eliminates manual adjustments, ensuring precise timekeeping. Many models include a bright, easy-to-read color display with jumbo 3-inch numbers for clear visibility.
Furthermore, integrated indoor/outdoor temperature display provides added functionality. Daylight Saving Time updates occur automatically, removing the need for manual intervention. Adjustable brightness settings cater to varying ambient light conditions.
These clocks offer a modern style and reliable performance, making them a valuable addition to any home or office.

Initial Setup and Configuration
Begin by installing the required batteries into your Sharp Atomic Clock. Following this, you can manually set the initial time and date if needed, before signal sync.
Installing Batteries
To install batteries, locate the battery compartment, typically on the back of your Sharp Atomic Clock. Gently slide open the compartment cover. Insert the correct type and number of batteries, observing the polarity markings (+ and -) inside the compartment.
Ensure the batteries are securely seated and making good contact. Incorrect battery installation can prevent the clock from functioning correctly. Replace all batteries at the same time for optimal performance. Avoid mixing old and new batteries. Once the batteries are installed, close the compartment cover securely.
The clock should power on automatically, initiating the initial setup process.
Setting Initial Time and Date (Manual Override)
If your Sharp Atomic Clock doesn’t immediately receive the WWVB signal, you’ll need to set the time and date manually. Locate the ‘Set’ or ‘Mode’ button on your clock. Press and hold this button to enter the setting mode. Use the ‘Hour’ and ‘Minute’ buttons to adjust the time accordingly.
Similarly, use designated buttons to set the correct month, day, and year. Confirm your selections by pressing the ‘Set’ or ‘Mode’ button again. Remember, this is a temporary setting; the clock will automatically synchronize with the WWVB signal when available, overriding your manual input.

Automatic Time Synchronization (WWVB Signal)
Your Sharp Atomic Clock automatically synchronizes with the WWVB signal, broadcast from Colorado, ensuring exceptional accuracy without manual adjustments. This radio signal provides precise time!
How WWVB Works
The WWVB signal, transmitted by the National Institute of Standards and Technology (NIST) in Fort Collins, Colorado, is a low-frequency radio signal that carries highly accurate time and date information. This signal utilizes a carrier frequency of 60 kHz and is designed for long-distance propagation, allowing it to cover a vast geographical area.
The WWVB signal encodes time data in a specific format, which your Sharp Atomic Clock decodes to set the correct time automatically. This process eliminates the need for manual time setting and ensures consistent accuracy. The signal is robust but can be affected by atmospheric conditions and interference, which is why optimal placement is crucial for reliable reception.
Optimizing WWVB Reception
To ensure reliable WWVB signal reception, position your Sharp Atomic Clock near a window, preferably facing north in the Northern Hemisphere. Avoid placing the clock near large metal objects, appliances, or other sources of interference. Keep the clock away from computers, televisions, and fluorescent lights, as these can disrupt the signal.
Nighttime reception is generally stronger due to favorable atmospheric conditions. If you experience consistent signal loss, try relocating the clock to a different location within your home. Remember, the WWVB signal travels long distances, but requires a clear path for optimal performance.
Troubleshooting WWVB Signal Loss
If your Sharp Atomic Clock isn’t receiving the WWVB signal, first ensure the clock isn’t near interference sources like computers or metal objects. Initiate a manual WWVB search by pressing and holding the search button – consult your model’s specific instructions.
If the signal remains elusive, relocate the clock to a different location, ideally near a window. Remember, signal strength fluctuates; patience is key. If problems persist, check battery levels, as low power can hinder reception. If the Atomic Clock still fails to receive, consider environmental factors impacting signal propagation.
Display and Functionality
The Sharp Atomic Clock features a clear digital display with intuitive icons. Adjust brightness for optimal viewing, and easily set alarms for reliable wake-up calls!
Understanding the Display Icons
Sharp Atomic Clocks utilize several display icons to convey important information at a glance. A radio wave icon indicates successful synchronization with the WWVB signal, confirming atomic time accuracy.
When this icon is absent, the clock is operating on its internal timekeeping, and may require signal reception. A low battery indicator alerts you when replacement is needed to maintain consistent performance;
Icons also represent alarm status (on/off), indoor/outdoor temperature display mode, and Daylight Saving Time activation. Familiarizing yourself with these icons ensures you can quickly interpret your clock’s current status and settings.
Refer to the full manual for a comprehensive icon glossary.
Adjusting Brightness
Sharp Atomic Clocks feature adjustable brightness levels to suit various lighting conditions and personal preferences. To modify the display brightness, locate the dedicated “Brightness” button on the clock’s casing – typically on the back or top.
Pressing this button cycles through available brightness settings: High, Medium, Low, and Off. Selecting “Off” conserves battery life when ambient light is sufficient.
Experiment with each level to find the optimal visibility for your environment. A brighter setting enhances readability in daylight, while a dimmer setting is ideal for nighttime viewing, minimizing disturbance.
Setting the Alarm
To set the alarm on your Sharp Atomic Clock, press and hold the “Alarm Set” button until the alarm time display begins to flash. Use the “Hour” and “Minute” buttons to adjust the desired alarm time. Once set, press “Alarm Set” again to confirm.
Activate or deactivate the alarm using the “Alarm On/Off” button. When activated, an alarm icon will appear on the display. The alarm sounds for approximately two minutes and then automatically shuts off.
Ensure the alarm is properly configured to avoid unexpected wake-up calls or missed alarms!

Advanced Features
Sharp Atomic Clocks boast indoor/outdoor temperature displays and automatic Daylight Saving Time updates, eliminating manual adjustments and providing enhanced convenience.
Indoor/Outdoor Temperature Display
Sharp Atomic Clocks with this feature utilize a remote sensor to accurately measure outdoor temperature, transmitting data wirelessly to the main clock unit. Ensure the sensor is placed in a shaded area, away from direct sunlight or heat sources, for reliable readings.
The clock displays both indoor and outdoor temperatures, selectable between Fahrenheit (°F) and Celsius (°C). Press the designated button to toggle between temperature displays or units. Accurate temperature readings depend on proper sensor placement and battery condition within the remote unit.
Regularly check the sensor battery to maintain consistent and precise temperature monitoring. The display will indicate low battery status when replacement is needed.
Daylight Saving Time (DST) Automatic Update
Your Sharp Atomic Clock automatically adjusts for Daylight Saving Time (DST), eliminating the need for manual adjustments twice a year. The clock receives the updated time information via the WWVB signal, including DST changes. Ensure a strong WWVB signal reception for accurate DST updates.
However, if the clock fails to receive the WWVB signal, it may not update DST automatically. In such cases, manual time setting might be necessary. The clock follows the standard North American DST schedule, springing forward in March and falling back in November.
Important: Verify the clock’s time after DST transitions to confirm correct operation.
Maintenance and Care
Regularly clean your Sharp Atomic Clock with a soft, dry cloth. Avoid harsh chemicals or abrasives. Replace batteries promptly to maintain accuracy!
Cleaning Your Clock
To ensure the longevity and pristine appearance of your Sharp Atomic Clock, regular cleaning is recommended. Always begin by disconnecting the clock from any power source, including batteries, before commencing the cleaning process. Use a soft, dry, lint-free cloth to gently wipe down the exterior surfaces.
Avoid using abrasive cleaners, solvents, or harsh chemicals, as these can damage the plastic casing or display screen. For stubborn smudges, lightly dampen the cloth with water, ensuring it is wrung out thoroughly to prevent moisture from entering the clock’s internal components.
Never spray liquid directly onto the clock. Pay particular attention to the display area, cleaning it with extra care. After cleaning, ensure the clock is completely dry before reconnecting the power source.
Battery Replacement
Your Sharp Atomic Clock requires batteries to maintain accurate timekeeping and function correctly, especially during periods of weak WWVB signal reception. When the low battery indicator appears on the display, promptly replace the batteries to avoid time loss or functionality issues.
Open the battery compartment located on the back of the clock. Typically, this involves a sliding cover or a small screw. Remove the old batteries, noting their correct polarity (+ and -). Insert new, high-quality alkaline batteries of the specified type, ensuring proper alignment.
Close the battery compartment securely. The clock may automatically begin searching for the WWVB signal after battery replacement. Allow sufficient time for synchronization.

Troubleshooting Common Issues
Experiencing problems with your Sharp Atomic Clock? This section provides solutions for signal reception, incorrect time displays, and other frequently encountered issues.
Follow these simple steps to restore optimal performance and ensure accurate, reliable timekeeping with your atomic clock.
Clock Not Receiving Signal
If your Sharp Atomic Clock isn’t receiving the WWVB signal, several factors could be at play. First, ensure the clock isn’t near large metal objects or electronic devices that may cause interference. Try relocating the clock to a different location, preferably near a window.
Initiate a manual WWVB search; consult your model’s specific instructions for this process. Remember, signal reception is often weaker at night or during stormy weather. Allow ample time for the clock to synchronize – it can take several minutes, even hours, to establish a connection.
If problems persist, check battery levels, as low power can hinder signal reception. Finally, confirm that WWVB transmission is active in your region.
Incorrect Time Display
If your Sharp Atomic Clock displays an incorrect time, first verify it has successfully received the WWVB signal – a signal icon should be visible. If the signal is weak or absent, initiate a manual time search as described in the “Automatic Time Synchronization” section.
Ensure Daylight Saving Time (DST) settings are correct; the clock should update automatically, but occasional glitches can occur. If manually overridden, revert to automatic time synchronization to allow the clock to correct itself.
A temporary loss of signal can sometimes cause discrepancies; allow sufficient time for re-synchronization. If issues continue, consider battery replacement.

FCC Compliance Information
This Sharp Atomic Clock complies with Part 15 of FCC rules. Operation is subject to not causing harmful interference, and accepting any received.
Part 15 Compliance
This device adheres to Part 15 of the Federal Communications Commission (FCC) regulations. Operation is contingent upon two key conditions: firstly, this device must not generate any detrimental interference. Secondly, it must accept any interference received, including interference that could potentially cause undesired operation.
Any alterations or modifications not explicitly approved by Sharp could void the user’s authority to operate the equipment. This ensures adherence to safety standards and prevents disruption to other electronic devices. Compliance with these regulations guarantees responsible use and minimizes potential interference within the radio frequency spectrum.
Safety Precautions
To ensure safe operation of your Sharp Atomic Clock, avoid exposing it to extreme temperatures or humidity. Do not disassemble or attempt to repair the clock yourself; contact qualified service personnel for assistance. Keep the device away from water and other liquids to prevent electrical shock or damage.
Always use the specified power source and avoid using damaged batteries. Dispose of used batteries responsibly, following local regulations. This device is intended for indoor use only. Following these precautions will help maintain the clock’s functionality and ensure your safety.
Product Specifications
Sharp Atomic Clocks measure 8.75W x 7.9H inches and require batteries for operation. They feature a digital display with adjustable brightness and multicolor options.
Dimensions and Weight
Sharp Atomic Clocks are designed with a compact footprint, making them suitable for various placements within your home or office environment. The overall dimensions of the clock typically measure approximately 8.75 inches in width (W) and 7.9 inches in height (H).
These dimensions provide a clear and easily readable display without occupying excessive space. While the exact weight may vary slightly depending on the specific model (SPC series), the clock is generally lightweight, facilitating easy handling and mounting options.
The combination of these dimensions and weight characteristics contributes to the clock’s overall portability and user-friendly design.
Power Requirements
Sharp Atomic Clocks are designed for efficient power consumption, primarily operating on standard batteries. Typically, these clocks require two to three AA alkaline batteries to function correctly. Battery life can vary depending on usage patterns and features enabled, such as display brightness and alarm settings.
It is recommended to use high-quality alkaline batteries to ensure optimal performance and longevity. Avoid mixing old and new batteries, or different battery types. The clock does not operate on AC power or require a separate adapter.
Regular battery replacement is essential for maintaining accurate timekeeping and functionality.

Warranty Information
Sharp warrants this Atomic Clock to be free from defects in materials and workmanship for a period of one (1) year from the date of original purchase. This warranty covers normal use and does not extend to damage resulting from misuse, abuse, accidents, or unauthorized modifications.
To obtain warranty service, please contact Sharp customer support with your proof of purchase. Defective products will be repaired or replaced at Sharp’s discretion. This warranty is your exclusive remedy.
Sharp disclaims all other warranties, expressed or implied, including merchantability and fitness for a particular purpose.
