N6660418Q0039_Attachment___1__Government_Min_Requirements.pdf

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Chip Scale Atomic Clock
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N66604-18-Q-0039
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PERFORMANCE SPECIFICATION FOR ASTEP GPS INTERNAL ATOMIC CLOCK PCB

REQUIREMENTS:

GPS ATOMIC CLOCK PCB SHALL COMPLY WITH ALL PERFORMANCE STANDARDS CITED

HEREIN AND RESULTS VERIFIED WITH APPLICABLE TESTING DOCUMENTATION

NOMINAL INPUT

INPUT VOLTAGE: 8 VDC to 20 VDC GPS ANTENNA: 5V, L1 C/A 1574MHz, passive or active

NOMINAL OUTPUTS

1PPS 5V CMOS

10 MHz CLOCK OUTPUT, MINIMUM OF 3

COMMUNICATION INTERFACE

RS-232 SCPI99-Control at 9.6K, 19.2K, 38.4K, 57.6K, 115.2K

GPS RECEIVER

50 channel, mobile SBAS: WAAS, EGNOS, MSAS supported

G-SENSITIVITY

<= 0.2ppb per-g per axis

MAGNETIC SENSITIVITY

<= 9.0E-11/Guauss, +/- 2.0 Gauss

HOLDOVER

<= ±2 µSec /24hrs w/ 1 hour GPS lock at +25C

ALLEN DEVIATION AFTER 20 MIN GPS LOCK

1s: <1E-10 10s: <2.5E-11

100s: <2E-11

WARM UP STABILZATION TIME

<= 120 secs at 25C to <5E-10s accuracy

FREQUENCY ACCURACY with GPS LOCK AFTER 3MIN <= +/-2E-10s

TOTAL POWER CONSUMPTION

<= 1.4W at +25C

OPERATING RANGE

0C to +70C

STORAGE RANGE

-30C to +85C

LONGEVITY

MTBF > 100,000hrs

N66604-18-Q-0039 - ATTACHMENT 1 - Government Minimum Requirements

BOARD SIZE

<= 2.52”x3”x0.7”

BOARD WEIGHT

<= 100g

SHOCK & VIBRATION

No loss of atomic lock with Mil-STD-810G, method 514.6, Procedure I, Category 23, General Minimum Integrity, 7.7-grms

No loss of atomic lock with vibration level 7.7grms for 30 min in 3 axis of direction

Mil-STD-202G, Method 213, Condition E: Survive (non-operating clock only) 100g, 0.5msec half-sine shock pulse

1PPS ACCURACY

±15ns to UTC RMS (1-sigma), GPS locked

OSCILLATOR AGING

Less than 0.3ppb per month in holdover without GPS

FREQUENCY STABILITY

Better than ±0.5E-09 (CSAC only, no GPS disciplining, 0°C to +75°C

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