Frequency Standard Catalog
HP 5071A Primary Frequency Standard
The HP 5071A Primary Frequency Standard delivers unsurpassed accuracy and stability for the most demanding laboratory and field applications. It 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 will ensure that your calibration services are available longer.
The HP 5071A is easy to use. Automatic startup is simple and requires no adjustments. A logical menu structure simplifies front-panel operations, selections, and status reporting. The HP 5071A can be operated and maintained anywhere. All controls are programmable, status can be checked remotely, and no adjustments or alignments are necessary during operation. An internal battery provides 45 minutes of backup in case of ac power failure.
Accuracy (full environmental range)
Temperature: 0° C to 50° C
Humidity: 0% to 80% (40° C maximum)
DC magnetic field: 0 gauss to 2 gauss
Accuracy: ±2 X 10e-12 (±1 X 10e-12, Option 001)
Reproducibility: ±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)
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1999.12.15. 263.4 15℃ |
. 2001. 9.15
270.0 28℃ |
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The HP 105B is an economical, precision frequency standard with performance
comparable to the best of the expensive primary standards. It is ideal for use
in mobile and fixed installations, including applications in navigation and
advanced communications. The 5-MHz output of the HP 105B has excellent short-term
stability and spectral purity with a signal-to-noise ratio of better than 90
dB.
The HP 105B is based on the HP 10811D, an oven-controlled crystal oscillator with exceptional reliability. Its low aging rate and fast warm-up time reduce maintenance costs and downtime. Low power consumption extends battery backup time.
The aging rate is typically reached within 24 hours of turn-on (after 24 hours off). The aging rate after three months of continuous on-time is typically +/- 1 X 10e-10/24 hours.
Each frequency output is buffered to provide an output stable to within +/- 2 parts in 10e11, regardless of load changes occurring in any other output frequency. Combined with the quartz crystal stability, buffering between outputs makes the HP 105B suited to frequency standards systems requiring use of multiple frequency outputs.
The HP 105B can be operated from an ac line (115/230V 50-400 Hz) or from an external 22-30V dc supply. It is equipped with a sealed Ni-Cad battery that supplies uninterrupted stand-by power for more than 8 hours, should line power fail.
A switch permits rapid battery recharge after an extended period of battery use.
Frequency Stability:
Long-Term Stability (Aging Rate): <5 x>Short-Term Stability: For 5 MHz output only. Refer to tables below.
Table 1: Time Domain Stability
-----------------------------------------
Averaging time Stability
tau[seconds] phi y (tau)
-----------------------------------------
10e-3 7.5 X 10e-10
10e-2 1.5 X 10e-10
10e-1 1.5 X 10e-11
10e0 1 X 10e-11
10e1 1 X 10e-11
-----------------------------------------
Table 2: Frequency Domain Stability
-----------------------------------------
Offset from 5 MHz Phase Noise Ratio
f [Hz] L(f) [dBc]
-----------------------------------------
10e0 -90
10e1 -120
10e2 -126
10e3 -146
10e4 -150
-----------------------------------------
As a Function of Ambient Temperature: Frequency change is less than
2.5 X 10e-9 total from 0 degrees C to +50 degrees C.
As a Function of Load: +/-2 X 10e-11 from open circuit to short,
50 ohm R, L, or C load change.
As a Function of Supply Voltage: +/-5 X 10e-11 for 22-30V dc from
26V dc reference (battery operation, 105B) and for 115/230V +/-10%.
Frequency Adjustments:
Fine Adjustments: Front-panel control with +/-5 X 10e-8 range, with
digital dial reading parts in 10e10.
Coarse Adjustments: 1 X 10e-6, coarse control is screwdriver
adjustment at front panel.
Phase Locking Capability:
An external +5V to -5V applied to EFC connector allows >2 parts in 10e8
frequency control for locking to an external source.
Warm-up (at 25 degrees C):
To within 1 X 10e-7 in 15 min., 1 X 10e-8 in 20 min., 1 X 10e-9 in 30 min.
of final value (24 hours after turn-on).
Outputs:
Frequencies: 5 MHz, 1 MHz, 100 kHz
Voltage Levels: >=1V rms into 50 ohm; clock drive >=0.5V rms into
1 Mohm.
Connectors: 5 MHz, 1 MHz, 100 kHz front- and rear-panel BNC
connectors, clock drive, and electronic frequency control
rear-panel BNC connectors.
Harmonic Distortion: (5 MHz, 1 MHz, 100 kHz) down more than
40 dB from rated output.
Spurious Phase Modulation: (Discrete sidebands 10 Hz to 25 kHz)
down more than 80 dB from rated output (5 MHz, 1 MHz, 100 kHz).
HP 105B Quartz Frequency Standard
Opt 908 Rack Flange Kit
PN 5060-0049 Board Extender, 15 pin
PN 5060-0630 Board Extender, 22 pin
PN 1251-0126 Connector (EXT DC, 5 pin)
HP 5085A Standby Power Supply (40 to 70 hours)
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