HP 5385A Frequency Counter

Product Summary

The HP 5385A Frequency Counter utilizes interpolar-enhanced reciprocal counting to provide outstanding performance at a low cost. Frequency coverage allows measurements from 10 Hz to 1 GHz, with resolution of 9 digits per second. The HP 5385A incorporates a programmable alphanumeric display, accessible remotely via either HP-IB (standard) or HP-IL (optional). The liquid crystal display (LCD) reduces component count, is easy to read (indoors or out), and improves counter reliability and serviceability.

The half-rack width HP 5385A instrument is portable, rackable, and stackable for use in the field, at a workbench, or as part of an ATE system. Options include a four-hour-capacity battery pack, and a high-stability ovenized oscillator for higher accuracy.

Product Features

• High input sensitivity extends applications

• Extensive input conditioning improves accuracy

• Variable display digits improve readability

• External DC operation extends portability

• Standard TCXO timebase

• Proven reliability

High Input Sensitivity

Extensive Input Conditioning

Variable Display Digits

External DC Operation

Product Specifications

Channel A Characteristics


Range: 10 Hz to 100 MHz

Sensitivity: [MAIN LEVEL] off

	
	15 mVrms sine wave 50 Hz to 100 MHz

	25 mVrms sine wave 10 Hz to 50 Hz

	45 mV pk-pk 5 ns minimum pulse width

	
Dynamic Range: 45 mV to 4 V pk-pk × attenuator setting.

Coupling: AC

Impedance:

	
	X1: 1 Mohm NOMINAL | | <25 pF

	X20: 500 kohm NOMINAL | | <25 pF

	
Attenuator: X1 or X20 NOMIONAL, X20 increases to X40 below 50 Hz

Low Pass Filter: 100 kHz NOMINAL 3 dB point


Channel B Characteristics


Fused input! (Front panel accessible)

Range: 90 to 1000 MHz

Sensitivity:

	
	10 mVrms (-27 dBm) 100-1000 MHz

	15 mVrms (-33 dBm) 90-100 MHz

	
Dynamic Range: 10 mV to 7 Vrms (-27 to +30 dBm)

Coupling: AC

Impedance: 50 ohm NOMINAL

Attenuator Level:

	
	Manual: variable from X1 to X18 (0 to25 dB) NOMINAL

	Auto: AGC mode for improved noise suppression.

	
Damage Level:

	
	AC > 1 MHz +30 dBm (7 Vrms)

	AC <1 MHz 2 Vrms

	DC +/- 5V

	

Timebase (TCXO)


Frequency: 10 MHz

Aging Rate: <1 × 10e-7/mo.

Temperature: 

	<2 × 10e-6, 0-40 degrees C 

	(± 1 × 10e-6, 0-40 degrees C if referenced to 25 degrees C, 

	and set to the offset frequency.)

Line Voltage: <5 × 10e-8 for ±10% variation.


Frequency A and B

Range Channel A: 10 Hz - 100 MHz

Range Channel B: 50 MHz - 225 MHz

LSD Displayed: 10 Hz to 1 nHz

LSD ((4 nsec) / (Gate Time))  × FREQ

Resolution: ±1 LSD ± ((1.4 × Trigger Error + 1 nsec rms) / (Gate Time)) × Freq

Accuracy: ± Resolution ± Time Base Error × Period

Product Ordering Information

HP 5385A	Frequency Counter 1.0 GHz
   Opt 004	High Stability Ovenized Timebase
   Opt 005	Battery Pack


HP 34110A       Vinyl Carrying/Operating Case
HP 82167A       HP-IL Cable, 0.5 m
PN 5061-1171    Side Handle Kit
PN 5060-0173    Rack Mount Kit (single)
PN 5060-0174    Rack Mount Kit (dual)

To help you make the right instrument 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.

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Page Updated: Thursday June 19 16:21:11 UTC 1997