Amendment to Lock-In Amplifier

Tender summary

<p><strong>AMENDMENT 1 TO LOCK-IN AMPLIFIER:&nbsp; 1333ND26QNB030183</strong></p> <p><strong>Vendor Question:</strong></p> <p>Should we include&nbsp;the UHF-MF Multi-frequency Option? The base UHFLI can demodulate 8 harmonics as requested on the notice, but only 4 of one of the two reference frequency. The UHF-MF option allows 8 harmonics of a single reference frequency or combinations of the two reference frequencies.</p> <p><strong>NIST Response:</strong></p> <p>The UHF-MF option is what we require technically, and what should be included in the quote.&nbsp; 8 harmonics are from a single reference signal. &nbsp;Yes, that is why the option UHF-MF is required.&nbsp; See updated Statement of Work for more details.&nbsp;</p> <p><strong>Response time has been extended from May 5,2026 to May 8,2026.&nbsp; </strong></p> <p></p> <p></p> <p>As described in the attached Combined Synopsis Solicitation, Statement of Work and Applicable Provisions and Clauses.</p> Solicitation Number: 1333ND26QNB030183 Type: Combined Synopsis/Solicitation Base Type: Combined Synopsis/Solicitation NAICS: 334516 Classification Code: 6640 Response Deadline: 2026-05-08T12:00:00-04:00 Office Address: GAITHERSBURG, MD Place of Performance: Boulder, Colorado, 80305 POC: Elizabeth Timberlake, elizabeth.timberlake@nist.gov POC: Forest Crumpler, forest.crumpler@nist.gov

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• Deadline listed as 8 May 2026.
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