Condition: Seller refurbished

Calibration expiry Feb 2026. In good working condition.

From the manufacturer:

Measurement capability: attenuator

settling time: 20 ms attenuation, 100 ms power

0.1 to 1000 dB/s attenuation transition speed (selectable)

+23 dBm input power

≤ 1.2 dB insertion loss

Measurement capability: power meter

Wavelength range: 1260-1640 nm

Power range: -80 to +10 dBm

Polarization dependence: <0.01 dB

System capability

One attenuator channel and two power meters in one half-width rack unit

Fully compatible with programs developed using the Keysight 8157x and 8156x modular attenuators

Includes powerful and user-friendly GUI software

Two instrument configurations can be stored and recalled

The Keysight N7751A combines an attenuator with 2 front-panel power meter channels, offering exceptional performance at a low price. The power meters permit measurements from any point in the measurements setup and assist in calibrating power offsets with respect to the attenuator output.

Extension of N77xx-series

The N7751A attenuator is an extension to Keysight’s high density N77xx-family that establishes a new standard in space-saving fiberoptic instrumentation.

Features and Benefits

Compact instrument combines and integrates multiple functions for setting attenuation and power levels and optical power measurement to reduce CAPEX and floor space.

Fast and precise setting of optical power levels with settling times of 100 ms for improved test throughput.

Active power control to keep output power constant

The power meters support convenient power offset calibration of the attenuators.

The instrument can be controlled via LAN and USB, as well as GPIB for compatibility with existing equipment.

An easy-to-use and intuitive graphical user interface software speeds up the integration process.

Applications

Optical transceiver testing

Optical network integration testing

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, the email should accompany the order number, date and reason for return and must be 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 this case we will arrange for the return by way of a prepaid shipping label.