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Upgrade firmware

Question asked by gopyan on Apr 4, 2013
Latest reply on Apr 4, 2013 by tabbott
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Hello Friends. I'am happy user of E4438C signal generator.

This excerpt of *403 option* description:

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The calibrated noise personality is recommended for flexible stand-alone AWGN generation and for setting signal-to-noise ratios directly within select E4438C ESG signal creation software. The uncorrelated nature of the test stimulus is ideal for generating noise interference and is especially important for determining receiver performance. The arbitrary waveform playback mode provides a repeatable noise stimulus used to isolate and debug the cause of received bit errors under various signal-to-noise ratio conditions

This option can be added as a product upgrade
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Please help me out, what does mean this phrase *This option can be added as a product upgrade*  
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