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AA5001: Difference between revisions
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It is intended to be used in conjunction with the [[SG5010]]. | It is intended to be used in conjunction with the [[SG5010]]. | ||
The '''DA4084''' is a modified variant of the AA5001 that replaces IM measurement with a SINAD function for radio equipment maintenance and characterization. The THD+N measurement of the regular AA5001 fails to measure signals with more than 10% noise content accurately because the autotuning of the notch filter will fail at these high noise levels. The SINAD function in the DA4084 performs the same measurement as THD+N but uses additional circuitry to lock the internal notch filter onto the audio tone at a low noise signal, and then maintains this lock for high noise signals up to 50%, which is sufficient for normal SINAD testing to find radio receivers sensitivity levels. | The '''DA4084''' is a modified variant of the AA5001 that replaces IM measurement with a SINAD function for radio equipment maintenance and characterization. The THD+N measurement of the regular AA5001 fails to measure signals with more than 10% noise content accurately because the autotuning of the notch filter will fail at these high noise levels. The SINAD function in the DA4084 performs the same measurement as THD+N but uses additional circuitry to lock the internal notch filter onto the audio tone at a low noise signal, and then maintains this lock for high noise signals up to 50%, which is sufficient for normal SINAD testing to find radio receivers' sensitivity levels. | ||
The DA4084 was supplied in a modified [[TM5003]] rack with an unusable left slot and a linear regulating power supply, but also works in generic TM5000 mainframes. | The DA4084 was supplied in a modified [[TM5003]] rack with an unusable left slot and a linear regulating power supply, but also works in generic TM5000 mainframes. | ||