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8901A Agilent Analyzer

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The 8901A is an analyzer from Agilent HP. Analyzers are key tools to test electronic equipment in the engineering, medical, automotive, and technological industries. Use analyzers for monitoring the performances of many different types of electronic devices. You may need analyzers for the measurement of components such as audio spectrums, voltages and currents, signals, and frequencies.

Additional Features:

  • Measures AM and FM to 1% accuracy
  • Measures RF frequency
  • Measures RF power
  • Low internal noise
  • Completely automatic

RF Input 

  • Frequency Range: 150 kHz to 1300 MHz
  • Operating Level: 12 mV rms to 7 V rms
  • Input Impedance: 50 Ω nominal
  • Tuning: Manual frequency entry, automatic, or track
  • Acquisition Time (automatic operation): ~1.5 s
  • Maximum Safe Input Level (typical): 35 V rms (25 W for source SWR <4), ac; 40 V, dc

Frequency Modulation

  • Rates: 20 Hz to 200 kHz
  • Deviations: To 400 kHz
  • Accuracy: ±2% of reading ±1 digit, 20 Hz to 10 kHz rates, 250 kHz to 10 MHz; ±1% of reading ±1 digit, 50 Hz to 100 kHz rates, 10 to 1300 MHz
  • Demodulated Output Distortion: <0.1% THD
  • AM Rejection (for 50% AM at 400 Hz and 1 kHz rates): <20 Hz peak deviation measured in a 50 Hz to 3 kHz BW
  • Residual FM (50 Hz to 3 kHz BW): <8 Hz rms @ 1300 MHz, decreasing linearly with frequency to <1 Hz rms for 100 MHz and below
  • Maximum Deviation Resolution: 1 Hz
  • Stereo Separation (50 Hz to 15 kHz): >47 dB typical

Phase Modulation

  • Carrier Frequency: 10 to 1300 MHz
  • Rates: 200 Hz to 20 kHz; typically usable from 20 Hz to 100 kHz with degraded performance
  • Deviation: To 400 radians
  • Maximum Deviation Resolution: 0.001 radian
  • Accuracy: ±3% of reading ±1 digit
  • Demodulated Output Distortion: <0.1% THD
  • AM Rejection (for 50% AM at 1 kHz rate): <0.03 radian peak deviation (50 Hz to 3 kHz BW)

Amplitude Modulation

  • Rates: 20 Hz to 100 kHz
  • Depth: To 99%
  • Accuracy: ±2% of reading ±1 digit, 50 Hz to 10 kHz rates, 150 kHz to 10 MHz; ±1% of reading ±1 digit, 50 Hz to 50 kHz rates, 10 to 1300 MHz
  • Flatness (variation in indicated AM depth for constant depth on input signal): ±0.3% of reading ±1 digit
  • Demodulated Output Distortion: <0.3% THD
  • FM Rejection (at 400 Hz and 1 kHz rates, 50 Hz to 3 kHz BW): <0.2% AM
  • Residual AM (50 Hz to 3 kHz BW): <0.01% rms
  • Maximum Depth Resolution: 0.01%

Frequency Counter

  • Range: 150 kHz to 1300 MHz
  • Accuracy: ±3 counts of least significant digit ± reference accuracy
  • Internal Reference
  • Frequency: 10 MHz
  • Aging rate: <1 x 10–6/month (optional: 1 x10–9/day)
  • Maximum Resolution: 10 Hz for frequencies <1 GHz; 100 Hz for frequencies ≥1 GHz

The Agilent 8901A modulation analyzer combines the capabilities of several RF instruments to give complete, accurate characterization of modulated signals in the 150 kHz to 1300 MHz frequency range. The 8901A very accurately measures modulation and recovers the modulation signal. The 8901A determines RF frequency and measures RF power. The 8901A is fully automatic and makes all major measurements at the press of a key or under GPIB control.

The Agilent 8901A is an excellent lab and production tool for accurately characterizing RF signals. Use the 8901A to make accurate AM/FM and FM/AM conversion measurements of phase- and amplitude-sensitive devices such as bandpass filters and multiple-channel receivers. Excellent isolation between AM and FM make it simple to separate the AM and FM of AM stereo, the incidental AM of FM transmitters, and the AM, FM, and FM components of complex signals.

The 8901A is an important component of automatic RF test systems. All functions are fully automatic and easily programmed. With these measurements combined into one instrument, interfacing requirements, hardware costs, and software-development time are reduced.

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