Condition: Used

This is the Spectrum Instruments TM-4M Time and Frequency Reference System, part number 20350-004, featuring GPS disciplining for highly accurate, traceable time and frequency outputs. The unit is supplied as pictured, and buyers should review the images carefully for cosmetic condition and included accessories.

Included in the sale:
• Spectrum Instruments TM-4M Time & Frequency Reference System (20350-004)
• Accessories as pictured

The images provided are of the actual item you will receive. Please review them carefully for the cosmetic condition and what is included in the sale.

The Spectrum Instruments TM-4M is a Time and Frequency Reference System designed for precision synchronisation and frequency distribution in laboratory, calibration, and telecommunications environments. GPS-disciplined, it provides highly accurate, traceable reference outputs that can be used to discipline other instruments or distribute a common time and frequency standard across a test setup.

Typical applications include standards laboratories, frequency calibration benches, communications test systems, and research facilities requiring a GPS-traceable time or frequency reference.

Key Specifications:
Model: TM-4M
Part Number: 20350-004
Manufacturer: Spectrum Instruments
Reference Type: Time and Frequency
Disciplining Source: GPS
Form Factor: Rack-mountable
Applications: Laboratory synchronisation, frequency calibration, signal distribution, telecoms testing

Please refer to the Spectrum Instruments manufacturer website for full technical specifications.

Shipping & Returns Policy

Shipping Policy

• Processing Time: Orders are typically processed and dispatched within 1 business day.
• Shipping Methods: We offer Expedited Shipping to all destinations using UPS/DHL/Fedex/Royal Mail and other reputable carriers.
• Shipping Times: Mainland UK: 1-2 Business Days / Mainland Europe and USA: 2-3 Business Days / Rest of the World 5-7 Business Days.
• Shipping Costs: These are calculated at checkout based on the shipping method, destination and package dimensions.
• CUSTOMS AND TAXES: It is YOUR responsibility to liaise with customs in your country and ensure your package is cleared and any taxes are paid.
• Shipping Destinations: We ship worldwide.
• Tracking: Once your order is shipped, we will provide you with a tracking number via email.
• Insurance: All shipments are insured. In case of damage, please contact us via email within 48 hours of receiving the product with photographic evidence, please also ensure a report is logged with the delivery driver.

Returns Policy

• Return Period: In the event of an item being received which is not as specified, you can return your purchase within 14 days of delivery.
• Condition of Items: Items must be returned unused and in their original packaging.
• Return Method: All returns must be notified in writing to hello@ttinstruments.com, and the email should include the order number, date and reason for return within 14 days of delivery.
• Restocking Fees: A restocking fee of up-to 20% is applicable for items returned for any reason other than not as specified.
• Refund Method: Refunds are processed to the original method of payment within 5 business days of receiving the return.
• Exchanges: We do not offer exchanges. It will either be a replacement or a refund.
• Return Shipping Costs: Return shipping costs will be borne by the customer unless the item is not as specified, in which case we will arrange a prepaid return label.