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The HP 85081B Input Module (100 kHz to 1 GHz, high impedance probe inputs) is for use with a 8508A and HP 70138A vector voltmeter. It provides the accuracy and dynamic range to make measurements on active and passive components. Module Specifications with a 8508A or 70138A. Frequency Range: 100 kHz to 1 GHz. Maximum Input: 2 V peak ac, ± 50 Vdc. A (ref) Channel Minimum: 10 mV, 100 kHz to 300 kHz; 1 mV, 300 kHz to 3 MHz; 300 uV, 3 MHz to 1 GHz. B Channel Noise Level: 10 uV. Input Crosstalk: > 100 dB, 1 MHz to 500 MHz > 80 dB, 500 MHz to 1 GHz. Magnitude Accuracy Absolute accuracy (A, B 100 mV, 15° to 30° C): + 1/ -1.5 dB, 100 kHz to 300 kHz, to ± 1 dB, 300 MHz to 1 GHz. Magnitude Accuracy Ratio accuracy (A, B 100 mV, 15° to 30° C): ± 1 dB, 100 kHz to 300 kHz, to ± .6 dB, 300 MHz to 1 GHz. Magnitude Accuracy Phase accuracy (A, B 100 mV, 15° to 30° C): ± 4, 300 kHz to 1 MHz, to ±6, 300 MHz to 1 GHz. Search and Lock Time: Lockup (within one range): 40 ms, frequencies up to 3 MHz; 20 ms, frequencies greater than 3 MHz.
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