Keysight formerly Agilent T&M 332A

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The HP 332A distortion analyzer is a solid state instrument for measuring distortion and ac voltages. Distortion levels of 0.1% to 100% full scale are measured in seven ranges for any fundamental frequency from 5 Hz to 600 kHz. Harmonics are indicated up to 3 MHz. The distortion characteristics can be monitored at the OUTPUT connectors with an oscilloscope, a TRMS voltmeter, or a wave analyzer. The voltmeter inside the 332A can be used separately for general purpose voltage and gain measurements.

The 332A includes amplitude modulation detection. The RF detector is untuned and accepts RF signals >1 V within a range of 550 kHz to 65 MHz. In the broadcast band (550 to 1600 kHz), the detector introduces less than 0.3% distortion into signals carried on 3-8 Vrms carriers modulated 30%.

• Distortion measurement range: 5 Hz to 600 kHz
• Distortion measurement accuracy: Distortion levels of 0.1% to 100% full scale are measured in seven ranges for frequencies of 5 Hz to 600 kHz
• Frequency calibration accuracy: Better than ±5% from 5 Hz to 300 kHz; better than ±10% from 300 kHz to 600 kHz
• Input impedance: 1 MΩ
• Input level for distortion measurements: 0.3 Vrms for 100% set level or 0.245 V for 0 dB set level (up to 300 V may be attenuated to set level reference)
• DC isolation: Signal ground can be ±400 Vdc from external chassis
• Voltmeter range: 300 µV to 300 Vrms full scale (13 ranges) 10 dB per range
• Voltmeter accuracy: ±2%, ±5% depending on voltage range and frequency
• Voltmeter frequency range: 5 Hz to 3 MHz
• Voltmeter residual noise measurements: <25 µVrms or <30 µVrms depending on termination
• Output: 0.1 Vrms ±0.01 Vrms and 0.05 Vrms ±0.005 V into 2 kΩ for full scale meter deflection
• AM detector: High impedance dc restoring peak detector with semi-conductor diode operates from 55 kHz to >65 MHz, broadband input, maximum input is 40 Vp-p ac or 40 V peak transient
• Carrier frequency:
  • 550 kHz to 1.6 MHz: Distortion introduced by detector is <0.3% for 3 to 8 V carriers modulated 30%
  • 1.6 MHz to 65 MHz: Distortion introduced by detector is <1% for 3 to 8 Vrms modulated 30%
• Option 01 meter with VU characteristics meets FCC requirements for AM, FM, and TV broadcasting