Primary Frequency Standards

The HP 5071A is the first cesium standard to specify its stability for averaging times longer than a day. With a specification for 30-day averaging time, the HP 5071A's performance ensures that your calibration services are available longer.

The HP 55000 Series Ensemble offers unsurpassed accuracy and stablity in a reliable, redundant platform. These systems integrate two or more HP 5071A cesium standards in a complete rack-mounted configuration along with an intelligent controller to manage the system. With configured with an HP 58503A GPS receiver, the system is able to monitor UTC (USNO MC) and provide a highly accurate timescale.

This product family includes

HP 5071A Primary Frequency Standard

• Automatic startup for ease of use
• Programmable controls allow remote status checks
• Cesium II technology for improved accuracy and stability
• Intuitive menus

HP 5071A Specifications

Accuracy (full environmental range)
      
Conditions (any combination)
  Temperature: 0 to 50 degrees C
  Humidity: 0 to 80% (40 degrees C maximum)
  DC magnetic field: 0 to 2 gauss

Accuracy and Reproducibility 
  Accuracy:  +/- 2 X 10e-12 (+/- 1 X 10e-12, Option 001)
  Reproducability:  <= 5.0 X 10e-13

Warmup Time (typical)
  15 min to normal operating status
  30 min to full specifications

Settability
  Resolution: 6.3 X 10e-15
  Range: +/- 1.0 X 10e-9

Frequency change due to environment
  +/- 1 X 10e-13 (+/- 8 X 10e-14, Option 001)


Stability (full environmental range)

Time domain stability (excluding environmental effects), 5/10-MHz outputs:

      Averaging Times	HP 5071A		HP 5071A Opt 001
      10e4 s		<= 5.6 X 10e-13		<= 8.5 X 10e-14
      1 day		<= 2.0 X 10e-13		<= 3.0 X 10e-14
      5 days		<= 1.0 X 10e-13		<= 2.0 X 10e-14
      30 days		<= 5.0 X 10e-14		<= 2.0 X 10e-14


Flicker floor (value)
<= 5.0 X 10e-14
<= 2.0 X 10e-14 (Option 001)


Frequency Domain Stability
   
    				    SSB Phase Noise dBc
   
    						High-performance
    Offset from		Standard cesium		cesium beam tube
    signal (Hz)		   beam tube		(Option 001)
   

       10e0		   <= -85		   <= -100
       10e1		   <= -125		   <= -130
       10e2		   <= -135		   <= -135
       10e3		   <= -140		   <= -140
       10e4		   <= -145		   <= -145
       10e5		   <= -145		   <= -145
  


Sinusoidal output characteristics (all located on rear panel)

							1 MHz
Parameter			Ports 1 and 2*		100 kHz

Amplitude into 50 ohm load	>1 Vrms			>1 Vrms

Isolation between ports		>110 dB (typ)		not specified

Harmonic and sub-harmonic
signals (typical)		<-40 dBc		<-40 dBc

Non-harmonic distortion		<- 100 dBc		not specified

Connector type			N			BNC

Source impedance		50 ohm			50 ohm

* Each output can be set to either 5 or 10 MHz from the front panel
  or by remote command.


Internal standby battery (nominal values)

Capacity: 45 minimum at 25 degrees C from full charge
Charge Time: 16 hour maximum from fully discharged state
Charge Source: AC input power only

Remote system interface
	
RS-232-C (DTE Configuration): Complete remote control of all instrument functions and parameters
Connector: 9-pin male rectangular D subminiature type

Environmental and physical

Temperature
  Operating: 0 to 55 degrees C
  Non-operating -40 to +70 degrees C

Size: 425.5 mm W X 133.4 mm H X 523.9 mm D (16.75 in X 5.25 in X 20.63 in)

Weight: 30 kg (65 lb)

HP 55000 Specifications

Contact your local HP sales office for configuration and specification
information

No literature is available online at this time.

HP 5071A         Primary Frequency Standard
HP 55000 Series  Precision Time and Frequency Systems

To help you make the right product choices

Your Field Sales Engineer is ready to answer your questions about specifications, applications and ordering. Find your Field Sales Engineer at your Local Sales Office.

Related Information:

GPS Antenna System Modules HP GPS primary reference, frequency reference, and synchronization modules along with HP GPS antenna accessories provide reliable, low-cost precision timing.

Distribution Amplifiers The HP Distribution Amplifier Family provides a cost-effective, modular approach to signal routing

Network Synchronization Products HP network synchronization hardware and software products are designed to meet the critical synchronization and management needs of telecommunications networks that employ SDH technology.

Related product groups available online:

Frequency/Time Standards and Synchronization

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Page Updated: Friday February 12 07:03:46 UTC 1999