Condition: Used — Tested and fully functional. Cosmetic imperfections are present but do not affect performance.

The HP Agilent 8494B is a dc to 18 GHz manual step attenuator providing attenuation in 1 dB steps from 0 to 11 dB. Precision gold-plated leaf springs ensure exceptional repeatability (typically 0.01 dB) and a lifespan exceeding 5 million cycles per section. The unit is compatible with Keysight 11716A/B/C interconnect kits for series connection with other 8494/5/6/7 step attenuators to achieve greater dynamic range in 1 dB steps. Option UK6 is available to provide NIST traceable attenuation and SWR data for enhanced measurement accuracy.

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 Keysight (formerly Agilent / HP) 8494B is a high-performance manual step attenuator designed for demanding RF and microwave applications. It covers a frequency range from dc to 18 GHz and provides precise attenuation in 1 dB steps from 0 to 11 dB. The instrument is built around precision gold-plated leaf springs that deliver outstanding repeatability and long service life, making it a reliable choice for laboratory and production test environments.

Frequency Range: dc to 18 GHz
Attenuation Range: 0 to 11 dB in 1 dB steps
Insertion Loss at 0 dB: 0.6 dB + 0.09 dB/GHz
Maximum SWR: 1.5 (dc to 8 GHz), 1.6 (to 12.4 GHz), 1.9 (to 18 GHz)
Repeatability: 0.03 dB max, 0.01 dB typical
Cycle Life: 5 million cycles per section (typical)
Maximum RF Input Power: 1 W average, 100 W peak
Connector Options: Type-N female, SMA female, or APC-7
Option UK6: NIST traceable attenuation and SWR data

The 8494B is compatible with the Keysight 11716A/B/C interconnect kits, allowing it to be connected in series with other 8494/5/6/7 step attenuators (1 dB and 10 dB models) to extend dynamic range while maintaining 1 dB step resolution. Custom step attenuator and switch combinations are also supported.

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.