Agilent / HP 4333A Distortion Analyzer

The Agilent HP 4333A Distortion Analyzer measures total harmonic distortion down to 0.01% full scale at 41 spot frequencies between 10 Hz and 100 kHz; harmonics are indicated up to 600 kHz. Automatic fundamental nulling reduces critical manual nulling operations where only coarse tuning of the frequencies is required. A 1 kHz high-pass filter is available (front panel switch) is available for reducing the effects of hum components below 400 Hz. A high sensitivity voltmeter mode offers 13 ranges in 10 dB steps; the range is from 100 µV to 100 V rms full scale. The 4333A has a bandwidth of 10 Hz to 600 kHz for the 300 µV to 100 V ranges and 10 Hz to 200 kHz for the 100 V range. Meter indication is proportional to the average value of the sine wave and calibrated in rms volts/%; dB scale is calibrated dBv.

Other specifications include:

• Distortion measurement range: distortion levels of 0.01% to 100% are measured full scale in nine positions of meter range.
• Frequency range for distortion measurement: frequency and multiplier controls 41 spot frequencies (not including overlapping points) for choosing between 10 Hz through 100 kHz in a 1, 1.5,2,3,4, 5,6,7, 8, 9, 10 sequence. Any set frequency is variable more than f 8% with frequency vernier.
• Distortion Measurement Accuracy:
  • Harmonic Measurement Accuracy (full scale):

• Elimination characteristics
  • Fundamental rejection:
    •  > 100 dB, 10 Hz to 10 kHz (multiplier X 10, X 100, X 1 K)
    • >95 dB, 10 kHz to 100 kHz (multiplier X 10 K)
  • Second harmonic accuracy: better than f 0.6 dB, 10 Hz to 100 kHz
  • Distortion introduced by instrument:
    • >-95 dB (0.0018%) from 10 Hz to 10 kHz (multiplier X 10, X 100, X 1 K)
    • >-90 dB (0.0032%) from 10 kHz to 30 kHz (multiplier X 10 K)
    • >-85 dB (0.0056%) from 40 kHz to 100 kHz (multiplier X 10 K)
  • lnput Impedance: 100 kO f 5% shunted by <80 pF Single ended, low side chassis ground
  • lnput level for distortion measurement: for 100% (0 dB) set level 1.0 V rms to 130 V rms. Minimum input for auto nulling is 1.0 V rms.
  • Voltmeter range: 100 µV to 100 V rms full scale (13 ranges) I0 dB per range.
  • Frequency range for voltage measurement:
    • 10 Hz to 600 kHz: (300 µV - 100 V range)
    • 10 HZ to 200 kHz: (100 µV range)
    • Voltmeter Accuracy:

•  Voltmeter residual noise (600O termination):
  • 300 µV range: <25 µV rms
  • 100 µV range: <10 mV rms
  • Monitor output: 0.1 V rms f 0.01 V rms open circuit for full scale meter indication. 2 kO +/-f 10% output impedance.
  • High-pass filter: 3 dB point at 400 Hz with 18 dB per octave rolloff. Normally used only with fundamental frequencies greater than 1 kHz.