# Amendment to Lock-In Amplifier

Canonical: https://abierto.us/opportunities/1333nd26qnb030183

- Solicitation number: 1333ND26QNB030183
- Notice type: Combined synopsis and solicitation
- Status: Closed. Deadline was May 8, 2026 at 12:00 PM EDT
- Department: Department of Commerce
- Agency: National Institute of Standards and Technology
- Contracting office: Department of Commerce NIST (1333ND)
- NAICS: 334516 Analytical Laboratory Instrument Manufacturing
- Product or service code: 6640 Laboratory Equipment and Supplies
- Place of performance: Boulder, Colorado
- County: Boulder County (FIPS 08013). https://abierto.us/counties/boulder-county-co-08013
- City: Boulder. https://abierto.us/cities/boulder-co-0807850
- First posted: April 20, 2026
- Last posted: April 27, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/ffbbdd1b61484225ad7e598d4335105d/view

## Description

**AMENDMENT 1 TO LOCK-IN AMPLIFIER:**

**1333ND26QNB030183 Vendor Question:** Should we include 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.

**NIST Response:** The UHF-MF option is what we require technically, and what should be included in the quote. 8 harmonics are from a single reference signal. Yes, that is why the option UHF-MF is required. See updated Statement of Work for more details. Response time has been extended from May 5,2026 to May 8,2026. As described in the attached Combined Synopsis Solicitation, Statement of Work and Applicable Provisions and Clauses.

## Publications

- April 20, 2026: Combined synopsis and solicitation, due May 5, 2026 at 12:00 PM EDT. Notice 5f1629f3ef4f40eaa2c41997d52df6d2. https://sam.gov/workspace/contract/opp/5f1629f3ef4f40eaa2c41997d52df6d2/view
- April 27, 2026: Combined synopsis and solicitation, due May 8, 2026 at 12:00 PM EDT. Notice ffbbdd1b61484225ad7e598d4335105d. https://sam.gov/workspace/contract/opp/ffbbdd1b61484225ad7e598d4335105d/view

## Points of contact

- Elizabeth Timberlake, elizabeth.timberlake@nist.gov
- Forest Crumpler, forest.crumpler@nist.gov

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/1333nd26qnb030183.