Condition: Used

Supplied as pictured. Opt: STD 001

Accurate Characterization of Multi-Gigabit Serial Interfaces Using Signal De-Emphasis

• adjustable de-emphasis for one pre- and two post-cursors of 0 to 12 dB
• supports data rates from 660 Mb/s to 14.2 Gb/s
• tolerates nonbalanced patterns
• transparent to jitter
• flexible use as front end for J-BERT N4903B, ParBERT 81250A, or other pattern generators
• optional clock multiplier (Option 001)
• small size
• programmable via J-BERT N4903B or standalone

Why Is Signal De-Emphasis Important?

The de-emphasis technique aids in the transmission of digital electrical signals at gigabit data rates. De-emphasis is a signal pre-distortion to compensate for signal degradations that occur when transmitting electrical signals with gigabit rates over PC board traces, backplanes, or long cables. The next generation of serial bus standards operating above 5 Gb/s will require sophisticated de-emphasis with multitap finite impulse response filtering.

High-speed digital interfaces such as PCI Express®, SATA, USB 3, QPI, and IEEE 802.3 backplanes (10GBASE-KR, 40GBASE-KR4) use de-emphasis.

What Does the N4916B Offer?

The Keysight N4916B de-emphasis signal converter enables R&D and test engineers to accurately emulate transmitter de-emphasis.

The N4916B can emulate transmitter de-emphasis with one pre- and two post-cursors and individually adjustable de-emphasis levels of up to 12.0 dB. With its DC coupling, it tolerates unbalanced pattern streams that often occur in training sequences. The N4916B is transparent to jitter when stimulated with jitter on data and clock signals, enabling emulation of real-world de-emphasis and jitter conditions that a receiver is expected to tolerate. De-emphasis can also compensate for distortions caused by cables, fixtures, or test boards in the test set for more precise device characterization results.

The de-emphasis signal converter can operate as a front end for J-BERT N4903B, ParBERT, or other gigabit pattern generators. Users can control it via a USB interface from the J-BERT N4903B user interface or a standalone user interface with programming examples.

What Does the N4916B's Clock-Multiplying Option Offer?

The clock multiplier option enables error counting and error analysis of devices using half-rate clocking. The full-rate clock is needed to use the error, eye, or jitter analysis capabilities of J-BERT N4903B.

Key Differences from Keysight's N4916A

• 3 adjustable cursors (N4916A has one post-cursor, sufficient for data rates < 5 Gb/s)
• optional clock multiplier
• standalone user interface
• maximum data rate
• aligned data and clock input signals required for full jitter transparency 
• size

PCIe is a trademark and PCI Express is a registered trademark of PCI-SIG.

For the manufacturer datasheet, please click here

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.