Atomic Clocks for Ensemble Time Scales

Use this document to detail specifications/requirements for an item and/or ancillary services. 🛈 TITLE: Atomic clocks for ensemble time scales 🛈 Requesting Lab/Division/Group: PML/688.40/Time Realization and Distribution Group General Statement of Need 🛈 NIST intends to construct two ensemble time scales to serve as resilient sources of time/frequency signals and as “backup” implementations of UTC(NIST), NIST’s realization of Coordinated Universal Time. An ensemble time scale consists of several independent atomic clocks, whose outputs are intercompared and usefully averaged together in a way that reduces bias, noise, and dependency on any one clock. The ensembles will consist of at least five atomic clocks each; the performance goal for each ensemble is for time dispersion in holdover less than 1.2 ns/day as random walk. Items and/or Ancillary Services 🛈 Item 1: Atomic clock Quantity: 10 Specifications: Specification 1.1: Short term stability of all output signals, <= 1e-11 Allan Deviation (ADEV) at 1 s averaging interval. Specification 1.2: Long term stability of all output signals, <= 2.7e-14 Allan Deviation (ADEV) for averaging intervals longer than 100,000 s (or, equivalently, <= 2.9e-14 ADEV at one day interval). Specification 1.3: At least one output signal at 10 MHz nominal frequency, amplitude >= 1 Vrms (or +13 dBm) into a 50 ohm terminated load. Specification 1.4: At least one output of a pulse-per-second (PPS) signal, amplitude > 1.5 V into a 50 ohm load. Specification 1.5: Accepts an input pulse-per-second (PPS) signal for coarse synchronization (<= 100 ns). Specification 1.6: Accepts AC power input of either 120V or 208V (60 Hz). Specification 1.7: Accepts 24V dc as an auxillary power source. Specification 1.8: Contains a battery backup providing at least 30 minutes of operation, or accepts an external battery pack via connector. Specification 1.9: Power consumption < 100 W. Specification 1.10: digitial system control and monitor interface, as serial (RS232), ethernet, or similar standard interface. Specification 1.11: digital interface reports warning/alarm/error status. Specifiaction 1.12: device compatible with EIA-compliant equipment racks, width < 482.6 mm. Specification 1.13: operational temperature range 15°C – 45°C. Specification 1.14: specified temperature coefficient (averaged over operational temperature range) < 3e-15/°C. Specification 1.15: sensitivity to magnetic field change < 4e-14 / G. Specification 1.16: demonstrated mean time between failures (MTBF) > 10 years (or 87,600 hours). Separately Priced Options and Services: Item 2: [List minimum specifications. Quantity: [Enter quantity here.] Specifications: [Enter quantity here.] **DELIVERY IS FOR TWO SEPARATE LOCATIONS, SEE SCHEDULE Service Requirements / Item Specifications Section 🛈 Requirements/Specifications 🛈 Planning Considerations N/A List any visits required to allow potential vendors to see site specific constraints. [Explain requirement here] US citizen required on-site (foreign nationals require preregistration 30 days prior) Vendor rep on-site more than three days Other considerations: [List other considerations to ensure an accurate quote] Shipping & Delivery N/A [Enter shipping and delivery information by item here.] Shipping criteria: Partial delivery acceptable Direct delivery to building required [Explain need for requirement here] Building has: Loading dock Containerization preference: [Choose container] Other requirements: Delivery of quantity 5 units to NIST-Boulder campus (325 Broadway, Boulder, CO 80305). Delivery of quantity 5 units to NIST-Gaithersburg campus (100 Bureau Drive, Gaithersburg, MD 20899). Delivery date criteria: Delivery of goods, installation, and training shall be completed no later than: 12-18 weeks ARO Deliver no earlier than: [Insert date here] Other: Electronic Media N/A [Enter electronic media requirements by item here.] Software Electronic manuals License Key Other: [List any other Electronic Media requirements here] [Enter email address for software delivery here] Installation N/A [Enter installation requirements by item here.] Vendor technician on site Rigging Uncrating / Unpackaging Removal of packaging material Equipment set up Start-up services Turn key installation Other [Enter details here.] Note: When installation is required, TPOC or COR shall be the coordination point. Facility / Utility Considerations N/A [List site specific utility considerations by item here.] OFPM Work Order Number(s) [List any Work Order Number(s) here] Power available Voltage: [Enter voltage here] (V) Max Current: [Enter max current draw here] (A) Phase: [Choose phase] Frequency: [Typically 60Hz] (Hz) NEMA Plug Type: [Enter plug type here] (i.e.: NEMA L5-20P) Environment: [Choose environment] Other power consideration: [List any other power considerations here] Utility connections: [List relevant available utilities, pressure(s), and flowrate(s)] Other considerations: [List other considerations to ensure an accurate quote] Warranty N/A Base Manufacturer Warranty is acceptable [If you require an Extended Manufacturer Warranty, describe the warranty requirements per item here.] What is included? Labor Parts Travel Cost and liability for returns Other: [Enter other requirements here] Warranty length: [Enter warranty length here] Period Length:[Ex. month, 6 month, year etc.] Training N/A [Training requirements (who, when, what, where) here. If on-site, is travel necessary?] On-site Off-site location: [Enter location(s) here] Number of trainees: [Enter number of trainees here] Scope of training: Operations Maintenance Troubleshooting Safety …