Manuali

HP 5384a - HP 5385a - -Operating and Service manual   168 pg

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HP 5384A Frequency counter

The Keysight 5384A Frequency Counter utilizes interpolar-enhanced reciprocal counting to provide outstanding performance at a low cost. Frequency coverage allows measurements from 10 Hz to 225 MHz, with resolution of 9 digits per second. The 5384A 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 5384A 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 oven oscillator for higher accuracy.

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

• Range: 50 to 225 MHz
• Sensitivity: 10 mVrms 50 to 200 MHz, 15 mVrms 200 to 225 MHz
• Dynamic Range: 10 mV to 1 Vrms
• Coupling: AC
• Impedance: 50 ohm NOMINAL
• Attenuator Level:
• Manual: variable from X1 to X5 (0 to 14 dB) NOMINAL
• Auto: AGC mode for improved noise suppression.
• Damage Level: 350 VDC + 5 Vrms AC

Timebase

• Frequency: 10 MHz
• Aging Rate: <3 × 10e-7/mo.
• Temperature: <5 × 10e-6, 0 degrees to 50 degrees C. Ref. to 25 degrees C.
• Line Voltage: <1 × 10e-7 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

• High input sensitivity extends applications
• Extensive input conditioning improves accuracy
• Variable display digits improve readability
• External dc operation extends portability
• Proven reliability
• For complete details, click on the Data Sheet link.
• High Input Sensitivity
• At least 15 mV rms sensitivity reduces the need for preamps and improves low-level signal measurement accuracy.
• Extensive Input Conditioning
• A low pass filter, automatic or manual attenuator and trigger level control features provide versatile signal-to-noise conditioning for optimum accuracy.
• Variable Display Digits
• View only readable digits from stable signals by controlling the number of display digits. Use as few as 3 or as many as 11 digits.
• External dc Operation

• Wide range (9-15V) external dc input power allows use of sources such as 12V automobile power to keep the timebase warm, or charge the battery option while in transit to remote sites.