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031-8421264

 
Fluke 908/909 Frequency References

Features

Stable frequency references for test systems and calibration labs

The 908 and 909 Frequency References are ideal for use in calibration laboratories where there is a specific need to calibrate a wide range of instruments, such as frequency counters and synthesizers. Unlike off-air frequency receivers, the 908 and 909 Frequency References have excellent short-term stability that enables much faster frequency calibration.

If frequency standards are located in several departments, spread over a number of buildings, you will discover the portable 909 Rubidium Frequency Reference Standard offers a more cost-effective solution than a central reference with a costly distribution system.

  • Accurate reference "Atomic clock" in automated test systems
  • Affordable and very cost effective
  • Designed for portability with optional carrying case
  • No need for battery backup during transportation
  • Fast warm-up time

 

Specs

Reference outputs
Base model
   5x10 MHz, 1x5 MHz: sine >0.6V rms in 50Ω
With Option 70
   10 x 10 MHz, 1 x 5 MHz: sine >0.6V rms in 50Ω
Frequency Stability
Aging per month
908 (Oven):  3x10-9
909 (Rubidium):  5x10-11
Aging per year (per 10 years)
908 (Oven):  2x10-8 (1 year)
909 (Rubidium):  1x10-9 (10 years)
Temperature
(20°C to 26°C)  
908 (Oven):  4x10-10 typ.
909 (Rubidium):  2x10-11 typ.
   --------
(0°C to +50°C)  
908 (Oven):  2.5x10-9
909 (Rubidium):  3x10--10
Short term (root Allan variance)
908 (Oven):  5x10-12, t= 10s
909 (Rubidium):  1x10-11, t=10s
   --------
908 (Oven):  5x10-12, t=1s
909 (Rubidium):  3x10-11, t=1s
Warm up (at +25oC)
908 (Oven):  10 mins. to 5x10-9
909 (Rubidium):  5.4 mins. to lock
   11 mins. to 4x10-10
Environment
Temperature
   0°C to +50°C (operating)
   -40°C to +70°C (storage)
Safety
   Compliant to EN 61010-1 and CE
EMI
   Compliant to EN 55011 ISM group, class B, EN 50082-2 and CE
Power Consumption (90-264V, 47-63 Hz)
908:
   <20W at warm up, < 7W continuous operation
909:
   <70W at warm up, <30W continuous operation
Dimensions and Weight
Size
   315 x 86 x 395 mm
   (12.4 x 3.4 x 15.5 ins)
Weight
   4.8 kg (net), 7.8 kg (shipping)
   (10.6 lb (net), 18.2 lb (shipping))
Calibration
Calibration Documentation 17025 accredited report of calibration included

Models

Model NameDescription
908

Crystal oven; 5 x 10 MHz and 1 x 5 MHz outputs

AccessoryDescription
908-50

Rack Mount Kit

908-60

Carrying Case

908-70

Additional 5 x 10 MHz Outputs

909

Rubidium; 5 x 10 MHz and 1 x 5 MHz outputs

AccessoryDescription
909-50

Rack Mount Kit

909-60

Carrying Case

909-70

Additional 5 x 10 MHz Outputs

 

 

 

 

 

 

 

 

 

 

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