Efratom FRS-C 10 MHz Rubidium Frequency Reference
Comes with what you see in the pictures. If you don't see it, you probably wont get it. May or may not include cables.
Specifications are from Ball/Efratom and may vary slightly due to upgrades, revisions or options this unit may or may not have.

Quantity available, only 1 sold in auction. It does come with an Operation and Maintenance Manual. We believe the 2 boards with this unit are a distribution amplifier. May or may not include cables. The specifications from the manual say the unit outputs a sine-wave but I have had several people tell me it is a square-wave so please keep that in mind.

Rubidium Standard Information:
Part Number: 100334-004

Board 1:
55761ASSY101874-002 Rev B
55761-101886-001 Rev A
Pc 1 94V-0

Board 2:
55761ASSY101720-002 Rev 4
55761-101719-001 Rev E

Casing the Unit Goes in:
ASSY 101707-001

Introduction:
The Efratom Model FRS Rubidium Standard is a subminiature, atomic resonance-controlled oscillator which provides an extremely pure and stable sinusoidal signal of 10 MHz at 0.5 Vrms into a 50 ohm load. The FRS-C may be utilized in equipment requiring an extremely stable and precise frequency and under more benign environmental conditions such as the time base of frequency counters.

Connections:
All necessary connections for input and output signals are externally accessible. Output signal, power, frequency adjustment, and built-in-test (BIT) functions are provided by a Cannon connector which mates with Cannon P/N DAM11WIS.

Features:

Electrical Specifications:
Output: 10 MHz Sine Wave, 0.5 ±30/10 % Vrms into 50 Ohm, set to 10 MHz ±5x10^-11 from factory (customers have told me that the wave is square).
Input Power: After warm-up, 10 W at 24 VDC at 25 °C ambient.
  Reg. Pwr.: 22 to 30 VDC, (< 350 mA)
  Htr. Pwr.: 22 to 30 VDC, (1.7A max during warm-up)
Warm-Up Characteristics: < or = to 4 min. to reach 1x10^-9 at +25 °C ambient.
Long-term Drift: < or = to 5x10^-11/mo*, < or = 5x10^-10/first year, < or = to 2x10^-10/year thereafter.
1-Day Stability: 4x10^-11/day**
Short-term Stability: oy(t)= < or = to 1x10^-10 t^-1/2;; for 1s < or = to t < or = to 100s
Frequency Accuracy: 1x10^-9/yr
Phase Noise (SSB 1 Hz BW): -65 dB at 1 Hz, -110 dB at 100 Hz, -125 dB at 1 KHz
Harmonic/Non-Harmonic: -40 dB (sine wave) / -70 dB
Trim Range: ±2x10^-9 max.
Retrace: ±2x10^-11
Magnetic Field: < or = to 4x10^-13 / am^-1 (< or = to 3x10^-11 / 0.1 milliTesla)
Voltage Variation: < or = to 2x10^-11 for ±10% input voltage change
Electrical Protection: An internal diode and fuse protects against reverse-polarity connection. Output is short-circuit protected.

Environmental Specifications:
Operating Temperature: < or = to 3x10^-10 from -5 °C to 55 °C Amb. (65 °C max baseplate)
Storage Temperature: -55 °C to 75 °C
Overall Environment Effects (Altitude, Vibration, Shock): Meets or exceeds MIL-T-28800B for Type III, Class 5 equipment.
Humidity: < or = to 95% RH

Physical Specifications (Just oscillator, not boards. Does not include shipping.):
Size: 2" x 3" x 4" (50 x 75 x 100 mm)
Weight: < or = to 1.2 lbs (0.55 kg)
Baseplate Threads (std): 4-40

* After 1 month of continuous operation.
** After 1 hour stabilization and operated within (25 ±3) °C ambient temperature.

For Domestic Customers: Packaging, handling, and order processing included in shipping in all domestic shipments as quoted by the shipping calculator. For International Customers there is a $5.00 minimum for packaging, handling, and order processing. International shipping to be determined by destination.

Prior to shipment I will need to know the following information (filled out on a form that I will send you) for International Customers or Packages/Freight being Forwarded internationally. International customers may also be subject to a freight forwarder form if applicable.:

(1) Are you the end-user of this item?

(2) If you are not the ultimate end-user of the item, please state the ultimate end user's name.

(3) What is the ultimate country destination?

05/14/04