HP 105B Quartz Frequency Standard

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.

[ Features ]

Guaranteed aging rate of less than 5 x 10e-10 per 24 hours
Well-buffered outputs for added stability
Battery backup included
Fast Charge/Float Charge switch
Compact, light, and rugged package
Guaranteed aging
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.
Well-buffered
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.
Battery
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.
Fast Charge
A switch permits rapid battery recharge after an extended period of battery use.

[ Specifications ]

Frequency Stability:

	Long-Term Stability (Aging Rate): <5 X 10e-10 per 24 hours

	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).

[ Ordering ]

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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