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The HP 8901B 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. Both instruments very accurately measure modulation and recover the modulation signal. They determine RF frequency and measure RF power. The additional capabilities of the HP 8901B are its improved power meter accuracy, its ability to use external power sensors, to make adjacent channel power measurements or carrier noise measurements (with options 030-037) and its ability to count audio frequencies and measure distortion on 400 Hz and 1 kHz signals. Both instruments are fully automatic and make all major measurements with the push of a key or under HP- IB control. RF Input Frequency range: 150 kHz to 1300 MHz. RF Input Operating level: 12 mV rms to 7 V rms. RF Input impedance: 50 ohm nominal. Frequency Modulation Rates: 20 Hz to 200 kHz. Frequency Modulation Deviations: to 400 kHz. FM 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 MHz to 1300 MHz. Phase Modulation Carrier frequency: 10 MHz to 1300 MHz. Phase Modulation Rates: 200 Hz to 20 kHz; typically usable from 20 Hz to 100 kHz with degraded performance. Phase Modulation Deviation: to 400 radians. Amplitude Modulation Rates: 20 Hz to 100 kHz. Amplitude Modulation Depth: to 99%. Amplitude Modulation 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 MHz to 1300 MHz. Frequency Counter Range: 150 kHz to 1300 MHz. Frequency Counter Accuracy: ±3 counts of least significant digit ± reference accuracy. Options. Opt 001: RF connectors on rear panel only. Opt 002: 1 x 10^-9 / day internal reference. Opt 003: Connections for external local oscillator. Opt 004: Operation from 48 to 440 Hz power (Temp. <40°C). Opt 021: Add HP 11722A Sensor Module. Opt 030: High selectivity (select only 2 filter options) (Options 032-037 require Option 030; Option 030 includes Option 003 connections for external local oscillators.) Opt 032: 12.5 kHz filter. Opt 033: 20.0 / 25.0 kHz filter. Opt 035: Cellular Radio Filter. Opt 037: Carrier Noise Filter
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